From 0308eb9eefb171ccd6cd3601b608b93106be7806 Mon Sep 17 00:00:00 2001
From: GGThed <mafiaggia@outlook.com>
Date: Tue, 11 Aug 2026 13:09:00 -0400
Subject: [PATCH] refactor(validation): un schema a la frontiere des matchs
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ARCH-005, premiere moitie. matches.py et team_matches.py lisaient une
quarantaine de champs sur request.form a la main et les croyaient tous.

Ce que ca produisait n etait pas bruyant :

- edit_match attrapait une heure invalide et faisait start_time = None,
  puis annoncait que le match etait mis a jour. Le match perdait son
  heure et le calendrier l affichait a minuit ;
- match_type etait accepte tel quel. Une valeur inconnue creait un match
  auquel aucun joueur n etait rattache, sans un mot ;
- une fin avant le debut etait enregistree telle quelle ;
- title est NOT NULL dans le modele et n etait pas verifie dans la route,
  donc un titre vide etait un 500 ;
- 'a,b' dans la selection de joueurs arrivait sur int() sans garde.

app/forms.py rassemble les deux fonctions de frontiere, qui vivaient dans
users/_shared.py parce que c est la qu elles avaient d abord servi. Elles
y restent re-exportees, donc aucun des trente appels n a bouge.

Le mixin des schemas lit desormais un champ vide comme un champ absent.
C est ce qui rendait ces formulaires invalidables : un formulaire HTML
envoie tout ce qu il affiche, donc une date optionnelle non remplie
arrive comme '' et non comme rien. Seuls les champs declares optionnels
sont concernes ; un champ requis laisse vide doit toujours echouer.

Deux duplications absorbees au passage, toutes deux nommees par l audit :
la boucle de creation des participants, ecrite deux fois et deja divergee
— la copie de edit_match gardait ses identifiants en chaines et appelait
int() une ligne plus loin — et le contexte de re-affichage du formulaire,
dont les versions courtes faisaient mourir un refus dans tojson sur un
Undefined : un message de validation devenait un 500.

Limite connue et consignee : le formulaire revient rempli avec les
valeurs enregistrees, pas avec la saisie refusee. Reafficher la
soumission demande de toucher aux gabarits, c est un autre changement.

19 tests neufs sur ces routes, qui n en avaient aucun. 447 au total.
---
 app/forms.py                   |  63 ++++++
 app/routes/matches.py          | 384 ++++++++++++---------------------
 app/routes/team_matches.py     | 129 ++++-------
 app/routes/users/_shared.py    |  35 +--
 app/validators.py              | 194 ++++++++++++++++-
 tests/test_match_scheduling.py | 322 +++++++++++++++++++++++++++
 6 files changed, 769 insertions(+), 358 deletions(-)
 create mode 100644 app/forms.py
 create mode 100644 tests/test_match_scheduling.py

diff --git a/app/forms.py b/app/forms.py
new file mode 100644
index 0000000..4a435e8
--- /dev/null
+++ b/app/forms.py
@@ -0,0 +1,63 @@
+"""The boundary between an HTTP form and a validated payload (ARCH-005).
+
+Every POST in this application arrives as a `werkzeug.MultiDict` of strings.
+Turning that into typed, checked values was done inline, differently, in each
+route: `int(x) if x else None` here, `datetime.strptime` inside a bare `try`
+there, and in several places not at all. The failures that produced were not
+loud ones — a bad time silently became `None` and the page said the match had
+been updated.
+
+Two functions here, one schema module next to them (`app.validators`):
+
+    payload = form_payload(list_fields=('player_ids',))
+    try:
+        data = MatchSchema().load(payload)
+    except ValidationError as err:
+        flash_validation_errors(err)
+        return _rerender()
+
+Both were originally inside `app/routes/users/_shared.py`, which is where
+they were first needed. They are re-exported from there so that nothing had
+to be renamed when the match and tryout routes started using them too.
+"""
+
+from flask import flash, request
+from flask_babel import gettext as _
+
+
+def flash_validation_errors(err):
+    """Surface marshmallow errors, one flash per problem.
+
+    The uniform reporting half of ARCH-005: before this, a bad date flashed
+    'Invalid date format.' from one route, redirected from another, and was
+    silently dropped by a third.
+    """
+    for field, messages in err.messages.items():
+        for msg in messages:
+            flash(_('%(field)s: %(msg)s', field=field, msg=msg), 'danger')
+
+
+def form_payload(*, checkboxes=(), list_fields=('games',), optional_blank=('password',)):
+    """Turn the multi-valued request form into a plain dict for marshmallow.
+
+    request.form.to_dict() keeps only the first value of a repeated key, so
+    list fields have to be re-read with getlist(). Unchecked HTML checkboxes
+    are simply absent from the submission, which is not the same as a schema
+    default, so they are injected explicitly. Blank optional fields are
+    dropped rather than sent as '' — an empty password means "leave the
+    current one alone", not "set the password to the empty string".
+
+    Args:
+        checkboxes: Names to report as True/False on presence.
+        list_fields: Names to read with getlist(), always producing a list.
+        optional_blank: Names to drop entirely when submitted empty.
+    """
+    payload = request.form.to_dict()
+    for name in list_fields:
+        payload[name] = request.form.getlist(name)
+    for name in checkboxes:
+        payload[name] = name in request.form
+    for name in optional_blank:
+        if not payload.get(name):
+            payload.pop(name, None)
+    return payload
diff --git a/app/routes/matches.py b/app/routes/matches.py
index 8101bc0..9580dec 100644
--- a/app/routes/matches.py
+++ b/app/routes/matches.py
@@ -8,9 +8,11 @@ from datetime import datetime, timedelta
 from flask import Blueprint, flash, jsonify, redirect, render_template, request, url_for
 from flask_babel import gettext as _
 from flask_login import current_user, login_required
+from marshmallow import ValidationError
 from sqlalchemy.orm import joinedload
 
 from app.extensions import db
+from app.forms import flash_validation_errors, form_payload
 from app.models import (
     Admin,
     Coach,
@@ -29,10 +31,62 @@ from app.models import (
     User,
 )
 from app.services.scheduling import notify_participants, zip_participants
+from app.validators import MatchEditSchema, MatchSchema
 
 matches_bp = Blueprint('matches', __name__, url_prefix='/matches')
 
 
+def match_form_payload():
+    """The match form, shaped for marshmallow.
+
+    `player_ids` is a repeated checkbox, so it needs getlist(); `games` — the
+    default list field — has nothing to do with this form.
+    """
+    return form_payload(list_fields=('player_ids',), optional_blank=())
+
+
+#: How long a match lasts when the form gives a start and no end.
+DEFAULT_MATCH_MINUTES = 30
+
+
+def default_end_time(date, start_time):
+    """End time for a match whose form left it blank."""
+    return (datetime.combine(date, start_time) + timedelta(minutes=DEFAULT_MATCH_MINUTES)).time()
+
+
+def create_participants(match, data):
+    """Attach participants to a match, per its type.
+
+    Was written out twice, in create_match and in edit_match, and had already
+    drifted: the copy in edit_match kept its player ids as strings and called
+    int() on them one line later, the one in create_match did not (ARCH-005).
+
+    Returns:
+        tuple: (player ids to notify, the participant rows created).
+    """
+    sides = []
+    if match.match_type == 'team_vs_team':
+        for side, team_id in ((1, match.team1_id), (2, match.team2_id)):
+            if team_id:
+                members = TeamMember.query.filter_by(team_id=team_id).all()
+                sides.append((side, [m.player_id for m in members]))
+    elif match.match_type == 'player_vs_player':
+        sides = [(1, data['team1_player_ids']), (2, data['team2_player_ids'])]
+    elif match.match_type == 'player_scrim':
+        sides = [(None, data['player_ids'])]
+
+    player_ids = []
+    participant_ids = []
+    for side, ids in sides:
+        for player_id in ids:
+            participant = MatchParticipant(match_id=match.id, player_id=player_id, team_side=side)
+            db.session.add(participant)
+            db.session.flush()
+            participant_ids.append(participant.id)
+            player_ids.append(player_id)
+    return player_ids, participant_ids
+
+
 def can_schedule_match():
     """Check if user can schedule matches (Admin, Manager, Coach, Scout)."""
     return isinstance(current_user, (Admin, Manager, Coach, Scout))
@@ -319,129 +373,53 @@ def create_match(tryout_id):
     all_players = sorted([p for p in all_players if p], key=lambda x: x.username)
     prefill_date = request.args.get('date', '')
 
+    def rerender():
+        return render_template(
+            'pages/match_form.html',
+            tryout=tryout,
+            teams=teams,
+            all_players=all_players,
+            prefill_date=prefill_date,
+        )
+
     if request.method == 'POST':
-        title = request.form.get('title')
-        description = request.form.get('description')
-        date_str = request.form.get('date')
-        start_time_str = request.form.get('start_time')
-        end_time_str = request.form.get('end_time')
-        location = request.form.get('location')
-        match_type = request.form.get('match_type')
-
-        if not start_time_str:
-            flash(_('Start time is required. Please select a time slot.'), 'danger')
-            return render_template(
-                'pages/match_form.html',
-                tryout=tryout,
-                teams=teams,
-                all_players=all_players,
-                prefill_date=prefill_date,
-            )
+        payload = match_form_payload()
+        # A tryout match with no date of its own happens on the tryout's day.
+        payload.setdefault('date', tryout.date.isoformat())
 
         try:
-            date_obj = datetime.strptime(date_str, '%Y-%m-%d').date() if date_str else tryout.date
-        except (ValueError, TypeError):
-            flash(_('Invalid date format.'), 'danger')
-            return render_template(
-                'pages/match_form.html',
-                tryout=tryout,
-                teams=teams,
-                all_players=all_players,
-                prefill_date=prefill_date,
-            )
-
-        start_time = None
-        end_time = None
-        try:
-            start_time = datetime.strptime(start_time_str, '%H:%M').time()
-            if end_time_str:
-                end_time = datetime.strptime(end_time_str, '%H:%M').time()
-            else:
-                start_dt = datetime.combine(date_obj, start_time)
-                end_dt = start_dt + timedelta(minutes=30)
-                end_time = end_dt.time()
-        except ValueError:
-            flash(_('Invalid time format.'), 'danger')
-            return render_template(
-                'pages/match_form.html', tryout=tryout, teams=teams, all_players=all_players
-            )
+            data = MatchSchema().load(payload)
+        except ValidationError as err:
+            flash_validation_errors(err)
+            return rerender()
 
         match = Match(
             tryout_id=tryout_id,
-            title=title,
-            description=description,
-            date=date_obj,
-            start_time=start_time,
-            end_time=end_time,
-            location=location,
-            match_type=match_type,
+            title=data['title'],
+            description=data['description'],
+            date=data['date'],
+            start_time=data['start_time'],
+            end_time=data['end_time'] or default_end_time(data['date'], data['start_time']),
+            location=data['location'],
+            match_type=data['match_type'],
             created_by=current_user.id,
         )
         db.session.add(match)
         db.session.flush()
 
-        notified_player_ids = []
-        notified_participant_ids = []
+        if data['match_type'] == 'team_vs_team':
+            match.team1_id = data['team1_id']
+            match.team2_id = data['team2_id']
 
-        if match_type == 'team_vs_team':
-            team1_id = request.form.get('team1_id')
-            team2_id = request.form.get('team2_id')
-            match.team1_id = int(team1_id) if team1_id else None
-            match.team2_id = int(team2_id) if team2_id else None
-            if match.team1_id:
-                for m in TeamMember.query.filter_by(team_id=match.team1_id).all():
-                    participant = MatchParticipant(
-                        match_id=match.id, player_id=m.player_id, team_side=1
-                    )
-                    db.session.add(participant)
-                    db.session.flush()
-                    notified_participant_ids.append(participant.id)
-                    notified_player_ids.append(m.player_id)
-            if match.team2_id:
-                for m in TeamMember.query.filter_by(team_id=match.team2_id).all():
-                    participant = MatchParticipant(
-                        match_id=match.id, player_id=m.player_id, team_side=2
-                    )
-                    db.session.add(participant)
-                    db.session.flush()
-                    notified_participant_ids.append(participant.id)
-                    notified_player_ids.append(m.player_id)
-        elif match_type == 'player_vs_player':
-            team1_player_ids = request.form.get('team1_player_ids', '')
-            team2_player_ids = request.form.get('team2_player_ids', '')
-            team1_ids = (
-                [int(p) for p in team1_player_ids.split(',') if p] if team1_player_ids else []
-            )
-            team2_ids = (
-                [int(p) for p in team2_player_ids.split(',') if p] if team2_player_ids else []
-            )
-            for pid in team1_ids:
-                participant = MatchParticipant(match_id=match.id, player_id=pid, team_side=1)
-                db.session.add(participant)
-                db.session.flush()
-                notified_participant_ids.append(participant.id)
-            for pid in team2_ids:
-                participant = MatchParticipant(match_id=match.id, player_id=pid, team_side=2)
-                db.session.add(participant)
-                db.session.flush()
-                notified_participant_ids.append(participant.id)
-            notified_player_ids = team1_ids + team2_ids
-        elif match_type == 'player_scrim':
-            player_ids = request.form.getlist('player_ids')
-            for pid in player_ids:
-                participant = MatchParticipant(match_id=match.id, player_id=int(pid))
-                db.session.add(participant)
-                db.session.flush()
-                notified_participant_ids.append(participant.id)
-            notified_player_ids = [int(p) for p in player_ids]
+        notified_player_ids, notified_participant_ids = create_participants(match, data)
 
         db.session.commit()
 
         notify_participants(
             title=match.title,
-            date=date_obj,
-            start_time=start_time,
-            end_time=end_time,
+            date=match.date,
+            start_time=match.start_time,
+            end_time=match.end_time,
             participants=zip_participants(notified_player_ids, notified_participant_ids),
             fallback_id=match.id,
         )
@@ -449,13 +427,7 @@ def create_match(tryout_id):
         flash(_('Match scheduled successfully!'), 'success')
         return redirect(url_for('tryouts.view_tryout', tryout_id=tryout_id))
 
-    return render_template(
-        'pages/match_form.html',
-        tryout=tryout,
-        teams=teams,
-        all_players=all_players,
-        prefill_date=prefill_date,
-    )
+    return rerender()
 
 
 @matches_bp.route('/<int:match_id>/edit', methods=['GET', 'POST'])
@@ -481,126 +453,74 @@ def edit_match(match_id):
     team1_player_ids = [p.player_id for p in match.participants.filter_by(team_side=1).all()]
     team2_player_ids = [p.player_id for p in match.participants.filter_by(team_side=2).all()]
 
+    def rerender():
+        """The form, with everything the template needs.
+
+        One context, used by the GET and by a rejected POST alike. The
+        rejection paths used to pass a shorter list, and match_form.html
+        serialises participants_map into a <script> block — so a rejected
+        edit died in `tojson` on an Undefined, turning a validation message
+        into a 500.
+        """
+        participants_map = {
+            p.player_id: {
+                'participant_id': p.id,
+                'attendance_confirmed': p.attendance_confirmed,
+                'team_side': p.team_side,
+            }
+            for p in match.participants.all()
+        }
+        return render_template(
+            'pages/match_form.html',
+            match=match,
+            tryout=tryout,
+            teams=teams,
+            all_players=all_players,
+            current_player_ids=current_player_ids,
+            team1_player_ids=team1_player_ids,
+            team2_player_ids=team2_player_ids,
+            participants_map=participants_map,
+        )
+
     if request.method == 'POST':
-        match.title = request.form.get('title')
-        match.description = request.form.get('description')
-        date_str = request.form.get('date')
-        start_time_str = request.form.get('start_time')
-        end_time_str = request.form.get('end_time')
-        location = request.form.get('location')
-        status = request.form.get('status')
-
         try:
-            match.date = datetime.strptime(date_str, '%Y-%m-%d').date()
-        except (ValueError, TypeError):
-            flash(_('Invalid date format.'), 'danger')
-            return render_template(
-                'pages/match_form.html',
-                match=match,
-                tryout=tryout,
-                teams=teams,
-                all_players=all_players,
-                current_player_ids=current_player_ids,
-            )
+            data = MatchEditSchema().load(match_form_payload())
+        except ValidationError as err:
+            flash_validation_errors(err)
+            return rerender()
 
-        if not start_time_str:
-            flash(_('Start time is required.'), 'danger')
-            return render_template(
-                'pages/match_form.html',
-                match=match,
-                tryout=tryout,
-                teams=teams,
-                all_players=all_players,
-                current_player_ids=current_player_ids,
-            )
-
-        try:
-            match.start_time = datetime.strptime(start_time_str, '%H:%M').time()
-            if end_time_str:
-                match.end_time = datetime.strptime(end_time_str, '%H:%M').time()
-            else:
-                start_dt = datetime.combine(match.date, match.start_time)
-                end_dt = start_dt + timedelta(minutes=30)
-                match.end_time = end_dt.time()
-        except ValueError:
-            match.start_time = None
-
-        match.location = location
-        if status in ['scheduled', 'completed', 'cancelled']:
-            match.status = status
+        # Assigned only once the whole form has been accepted. Assigning as
+        # each field was read meant a form rejected halfway had already
+        # changed the record in the session.
+        match.title = data['title']
+        match.description = data['description']
+        match.date = data['date']
+        match.start_time = data['start_time']
+        match.end_time = data['end_time'] or default_end_time(data['date'], data['start_time'])
+        match.location = data['location']
+        match.status = data['status']
 
         notified_player_ids = []
         notified_participant_ids = []
 
         if match.match_type == 'team_vs_team':
-            team1_id = request.form.get('team1_id')
-            team2_id = request.form.get('team2_id')
-            new_team1_id = int(team1_id) if team1_id else None
-            new_team2_id = int(team2_id) if team2_id else None
-
-            if new_team1_id != match.team1_id or new_team2_id != match.team2_id:
+            teams_changed = data['team1_id'] != match.team1_id or data['team2_id'] != match.team2_id
+            if teams_changed:
                 MatchParticipant.query.filter_by(match_id=match.id).delete()
-                match.team1_id = new_team1_id
-                match.team2_id = new_team2_id
-                if match.team1_id:
-                    for m in TeamMember.query.filter_by(team_id=match.team1_id).all():
-                        participant = MatchParticipant(
-                            match_id=match.id, player_id=m.player_id, team_side=1
-                        )
-                        db.session.add(participant)
-                        db.session.flush()
-                        notified_participant_ids.append(participant.id)
-                        notified_player_ids.append(m.player_id)
-                if match.team2_id:
-                    for m in TeamMember.query.filter_by(team_id=match.team2_id).all():
-                        participant = MatchParticipant(
-                            match_id=match.id, player_id=m.player_id, team_side=2
-                        )
-                        db.session.add(participant)
-                        db.session.flush()
-                        notified_participant_ids.append(participant.id)
-                        notified_player_ids.append(m.player_id)
+                match.team1_id = data['team1_id']
+                match.team2_id = data['team2_id']
+                notified_player_ids, notified_participant_ids = create_participants(match, data)
             else:
-                if match.team1_id:
-                    notified_player_ids.extend(
-                        [
-                            m.player_id
-                            for m in TeamMember.query.filter_by(team_id=match.team1_id).all()
-                        ]
-                    )
-                if match.team2_id:
-                    notified_player_ids.extend(
-                        [
-                            m.player_id
-                            for m in TeamMember.query.filter_by(team_id=match.team2_id).all()
-                        ]
-                    )
-        elif match.match_type == 'player_vs_player':
+                # Same teams: the roster stands, but everyone is told again,
+                # because the date or the time may have moved.
+                for team_id in (match.team1_id, match.team2_id):
+                    if team_id:
+                        notified_player_ids.extend(
+                            m.player_id for m in TeamMember.query.filter_by(team_id=team_id).all()
+                        )
+        else:
             MatchParticipant.query.filter_by(match_id=match.id).delete()
-            team1_str = request.form.get('team1_player_ids', '')
-            team2_str = request.form.get('team2_player_ids', '')
-            t1_ids = [p for p in team1_str.split(',') if p.strip()] if team1_str else []
-            t2_ids = [p for p in team2_str.split(',') if p.strip()] if team2_str else []
-            for pid in t1_ids:
-                participant = MatchParticipant(match_id=match.id, player_id=int(pid), team_side=1)
-                db.session.add(participant)
-                db.session.flush()
-                notified_participant_ids.append(participant.id)
-            for pid in t2_ids:
-                participant = MatchParticipant(match_id=match.id, player_id=int(pid), team_side=2)
-                db.session.add(participant)
-                db.session.flush()
-                notified_participant_ids.append(participant.id)
-            notified_player_ids = [int(p) for p in t1_ids] + [int(p) for p in t2_ids]
-        elif match.match_type == 'player_scrim':
-            MatchParticipant.query.filter_by(match_id=match.id).delete()
-            player_ids = request.form.getlist('player_ids')
-            for pid in player_ids:
-                participant = MatchParticipant(match_id=match.id, player_id=int(pid))
-                db.session.add(participant)
-                db.session.flush()
-                notified_participant_ids.append(participant.id)
-            notified_player_ids = [int(p) for p in player_ids]
+            notified_player_ids, notified_participant_ids = create_participants(match, data)
 
         db.session.commit()
 
@@ -616,25 +536,7 @@ def edit_match(match_id):
         flash(_('Match updated successfully!'), 'success')
         return redirect(url_for('tryouts.view_tryout', tryout_id=tryout.id))
 
-    participants_map = {}
-    for p in match.participants.all():
-        participants_map[p.player_id] = {
-            'participant_id': p.id,
-            'attendance_confirmed': p.attendance_confirmed,
-            'team_side': p.team_side,
-        }
-
-    return render_template(
-        'pages/match_form.html',
-        match=match,
-        tryout=tryout,
-        teams=teams,
-        all_players=all_players,
-        current_player_ids=current_player_ids,
-        team1_player_ids=team1_player_ids,
-        team2_player_ids=team2_player_ids,
-        participants_map=participants_map,
-    )
+    return rerender()
 
 
 @matches_bp.route('/api/manageable-tryouts')
diff --git a/app/routes/team_matches.py b/app/routes/team_matches.py
index 1d28c0f..cf9dc2d 100644
--- a/app/routes/team_matches.py
+++ b/app/routes/team_matches.py
@@ -3,13 +3,15 @@
 Uses polymorphic isinstance checks instead of role-string comparisons.
 """
 
-from datetime import datetime, timedelta
+from datetime import datetime
 
 from flask import Blueprint, flash, jsonify, redirect, render_template, request, url_for
 from flask_babel import gettext as _
 from flask_login import current_user, login_required
+from marshmallow import ValidationError
 
 from app.extensions import db
+from app.forms import flash_validation_errors, form_payload
 from app.models import (
     Admin,
     Coach,
@@ -21,7 +23,9 @@ from app.models import (
     TeamPlayer,
 )
 from app.permissions import can_manage_org_team, coach_org_teams, visible_org_teams
+from app.routes.matches import default_end_time
 from app.services.scheduling import notify_participants, zip_participants
+from app.validators import TeamMatchSchema
 
 team_matches_bp = Blueprint('team_matches', __name__, url_prefix='/team-matches')
 
@@ -130,27 +134,16 @@ def create_match(team_id):
         )
 
     if request.method == 'POST':
-        title = request.form.get('title', default_title)
-        opponent = request.form.get('opponent', '').strip() if not is_practice else None
-        description = request.form.get('description', '')
-        date_str = request.form.get('date')
-        start_time_str = request.form.get('start_time')
-        end_time_str = request.form.get('end_time')
-        location = request.form.get('location', '')
-
-        if not date_str:
-            flash(_('Date is required.'), 'danger')
-            return render_template(
-                'pages/team_match_form.html',
-                team=team,
-                team_players=team_players,
-                prefill_date=prefill_date,
-            )
+        payload = form_payload(list_fields=(), optional_blank=())
+        # A practice has no opponent, whatever the form sent.
+        payload.setdefault('title', default_title)
+        if is_practice:
+            payload.pop('opponent', None)
 
         try:
-            date_obj = datetime.strptime(date_str, '%Y-%m-%d').date()
-        except (ValueError, TypeError):
-            flash(_('Invalid date format.'), 'danger')
+            data = TeamMatchSchema().load(payload)
+        except ValidationError as err:
+            flash_validation_errors(err)
             return render_template(
                 'pages/team_match_form.html',
                 team=team,
@@ -159,36 +152,18 @@ def create_match(team_id):
                 is_practice=is_practice,
             )
 
-        start_time = None
-        end_time = None
-        if start_time_str:
-            try:
-                start_time = datetime.strptime(start_time_str, '%H:%M').time()
-                if end_time_str:
-                    end_time = datetime.strptime(end_time_str, '%H:%M').time()
-                else:
-                    start_dt = datetime.combine(date_obj, start_time)
-                    end_dt = start_dt + timedelta(minutes=30)
-                    end_time = end_dt.time()
-            except ValueError:
-                flash(_('Invalid time format.'), 'danger')
-                return render_template(
-                    'pages/team_match_form.html',
-                    team=team,
-                    team_players=team_players,
-                    prefill_date=prefill_date,
-                    is_practice=is_practice,
-                )
+        start_time = data['start_time']
+        end_time = data['end_time'] or default_end_time(data['date'], start_time)
 
         team_match = TeamMatch(
             org_team_id=team_id,
-            title=title,
-            description=description or None,
-            opponent=opponent or None,
-            date=date_obj,
+            title=data['title'],
+            description=data['description'],
+            opponent=data['opponent'],
+            date=data['date'],
             start_time=start_time,
             end_time=end_time,
-            location=location or None,
+            location=data['location'],
             created_by=current_user.id,
         )
         db.session.add(team_match)
@@ -208,7 +183,7 @@ def create_match(team_id):
 
         notify_participants(
             title=team_match.title,
-            date=date_obj,
+            date=team_match.date,
             start_time=start_time,
             end_time=end_time,
             participants=zip_participants(
@@ -217,7 +192,9 @@ def create_match(team_id):
             fallback_id=team_match.id,
         )
 
-        flash(_('Team match "%(title)s" scheduled successfully!', title=title), 'success')
+        flash(
+            _('Team match "%(title)s" scheduled successfully!', title=team_match.title), 'success'
+        )
         return redirect(url_for('team_matches.list_matches'))
 
     return render_template('pages/team_match_form.html', team=team, team_players=team_players)
@@ -235,42 +212,30 @@ def edit_match(match_id):
         return redirect(url_for('team_matches.list_matches'))
 
     if request.method == 'POST':
-        team_match.title = request.form.get('title', team_match.title)
-        team_match.description = request.form.get('description', '') or None
-        team_match.opponent = request.form.get('opponent', '').strip() or None
+        # The three date and time fields used to be checked one at a time,
+        # each flashing and redirecting on its own: a form with two mistakes
+        # took two round trips to be told about both. One schema now, every
+        # problem reported at once and in place.
+        #
+        # Known limit: the re-render reads the stored record, so what was
+        # typed is not echoed back. Repopulating the form from the
+        # submission is a separate change to the template.
+        try:
+            data = TeamMatchSchema().load(form_payload(list_fields=(), optional_blank=()))
+        except ValidationError as err:
+            flash_validation_errors(err)
+            return render_template(
+                'pages/team_match_form.html', match=team_match, team=team, team_players=[]
+            )
 
-        date_str = request.form.get('date')
-        if date_str:
-            try:
-                team_match.date = datetime.strptime(date_str, '%Y-%m-%d').date()
-            except (ValueError, TypeError):
-                flash(_('Invalid date format.'), 'danger')
-                return redirect(url_for('team_matches.edit_match', match_id=match_id))
-
-        # Both used to `except ValueError: pass`, three lines below a date
-        # field that flashes and redirects. A mistyped time was therefore
-        # accepted by the form, discarded, and the old value kept — with the
-        # page reporting success. Same treatment as the date now.
-        start_time_str = request.form.get('start_time')
-        if start_time_str:
-            try:
-                team_match.start_time = datetime.strptime(start_time_str, '%H:%M').time()
-            except (ValueError, TypeError):
-                flash(_('Invalid start time format.'), 'danger')
-                return redirect(url_for('team_matches.edit_match', match_id=match_id))
-
-        end_time_str = request.form.get('end_time')
-        if end_time_str:
-            try:
-                team_match.end_time = datetime.strptime(end_time_str, '%H:%M').time()
-            except (ValueError, TypeError):
-                flash(_('Invalid end time format.'), 'danger')
-                return redirect(url_for('team_matches.edit_match', match_id=match_id))
-
-        team_match.location = request.form.get('location', '') or None
-        status = request.form.get('status')
-        if status in ['scheduled', 'completed', 'cancelled']:
-            team_match.status = status
+        team_match.title = data['title']
+        team_match.description = data['description']
+        team_match.opponent = data['opponent']
+        team_match.date = data['date']
+        team_match.start_time = data['start_time']
+        team_match.end_time = data['end_time'] or default_end_time(data['date'], data['start_time'])
+        team_match.location = data['location']
+        team_match.status = data['status']
 
         db.session.commit()
         flash(_('Match updated successfully!'), 'success')
diff --git a/app/routes/users/_shared.py b/app/routes/users/_shared.py
index 72a851e..5ad0267 100644
--- a/app/routes/users/_shared.py
+++ b/app/routes/users/_shared.py
@@ -4,10 +4,15 @@ Nothing here touches the blueprint: these are plain functions, so a test
 can call them with a request context and nothing else.
 """
 
-from flask import flash, request
+from flask import request
 from flask_babel import gettext as _
 
 from app.extensions import db
+
+# Re-exported: these two moved to app/forms.py once the match and tryout
+# routes needed them as well (ARCH-005). Importing them from here still
+# works, so the thirty call sites in this package did not have to move.
+from app.forms import flash_validation_errors, form_payload  # noqa: F401
 from app.models import GAME_PLATFORMS, Admin, Coach, Manager, Player, Scout, UserGamertag
 
 ALLOWED_CONTRACT_EXTENSIONS = {'pdf'}
@@ -57,34 +62,6 @@ def pdf_upload_error(file, allowed_extensions):
     return None
 
 
-def flash_validation_errors(err):
-    """Surface marshmallow errors the same way auth.py already does."""
-    for field, messages in err.messages.items():
-        for msg in messages:
-            flash(_('%(field)s: %(msg)s', field=field, msg=msg), 'danger')
-
-
-def form_payload(*, checkboxes=(), list_fields=('games',), optional_blank=('password',)):
-    """Turn the multi-valued request form into a plain dict for marshmallow.
-
-    request.form.to_dict() keeps only the first value of a repeated key, so
-    list fields have to be re-read with getlist(). Unchecked HTML checkboxes
-    are simply absent from the submission, which is not the same as a schema
-    default, so they are injected explicitly. Blank optional fields are
-    dropped rather than sent as '' — an empty password means "leave the
-    current one alone", not "set the password to the empty string".
-    """
-    payload = request.form.to_dict()
-    for name in list_fields:
-        payload[name] = request.form.getlist(name)
-    for name in checkboxes:
-        payload[name] = name in request.form
-    for name in optional_blank:
-        if not payload.get(name):
-            payload.pop(name, None)
-    return payload
-
-
 def update_user_gamertags(user, selected_games):
     """Update gamertags for a user based on form input."""
     existing_gamertags = {gt.game: gt for gt in user.gamertags}
diff --git a/app/validators.py b/app/validators.py
index 1c6e981..b52369d 100644
--- a/app/validators.py
+++ b/app/validators.py
@@ -137,18 +137,55 @@ class StripMixin(Schema):
         unknown = EXCLUDE  # Ignore csrf_token and other unknown fields
 
     @pre_load
-    def strip_strings(self, data, **kwargs):
-        """Strip whitespace from all string values in the input data.
+    def normalise_form_values(self, data, **kwargs):
+        """Strip whitespace, and read an empty input as an absent one.
+
+        Both halves in one hook rather than two: marshmallow gives no
+        ordering guarantee between several pre_load hooks on the same schema,
+        and these two have to happen in this order.
+
+        The second half is what let the match and tryout forms be validated
+        at all (ARCH-005). An HTML form submits every field it renders, so an
+        untouched optional date arrives as '' rather than not arriving —
+        and '' is not a date, so a schema written the obvious way rejected
+        every form with a blank optional field. Dropping the key instead lets
+        `load_default` do its job.
+
+        Only fields the schema declares as optional are dropped. A blank
+        *required* field still has to fail, and say so.
 
         Args:
             data: The input dictionary.
 
         Returns:
-            dict: Data with stripped strings.
+            dict: Data with stripped strings and blank optionals removed.
         """
-        if isinstance(data, dict):
-            return {k: v.strip() if isinstance(v, str) else v for k, v in data.items()}
-        return data
+        if not isinstance(data, dict):
+            return data
+
+        stripped = {k: v.strip() if isinstance(v, str) else v for k, v in data.items()}
+        return {
+            key: value
+            for key, value in stripped.items()
+            if value != '' or self._is_required(key) or self._accepts_blank(key)
+        }
+
+    def _is_required(self, key):
+        field = self.fields.get(key)
+        return field is not None and field.required
+
+    def _accepts_blank(self, key):
+        """True when '' is a value this field means to receive.
+
+        A plain String is one: `description=''` on an edit form means "clear
+        the description", not "leave it alone". An Email is not — there is no
+        such thing as an empty address, so a blank one is an absent one.
+
+        Typed fields (Integer, Date, Time, List) are not Strings and so are
+        never kept blank, which is the whole point of the hook.
+        """
+        field = self.fields.get(key)
+        return isinstance(field, fields.String) and not isinstance(field, fields.Email)
 
 
 class LoginSchema(StripMixin):
@@ -470,3 +507,148 @@ class DisponibilityAddSchema(StripMixin):
         required=True,
         validate=validate.Regexp(r'^\d{2}:\d{2}$', error=_l('Start time must be in HH:MM format.')),
     )
+
+
+# =============================================================================
+# Scheduling — matches and tryouts (ARCH-005)
+# =============================================================================
+
+#: The three shapes a tryout match can take. Read by the route to decide how
+#: participants are drawn; a value outside this set produced a match with no
+#: participants at all and no complaint.
+MATCH_TYPES = ('team_vs_team', 'player_vs_player', 'player_scrim')
+
+#: Match lifecycle. Was checked with an inline `if status in [...]` that
+#: silently kept the old value on anything else.
+MATCH_STATUSES = ('scheduled', 'completed', 'cancelled')
+
+
+class CommaSeparatedIds(fields.Field):
+    """A hidden input holding '3,7,12' — ids picked in the page.
+
+    The match form posts its player selections this way. Every route parsed
+    it by hand, and each did it slightly differently: one dropped empty
+    segments, another did not, a third called int() on whatever came out and
+    would have raised a 500 on 'a,b'.
+    """
+
+    default_error_messages = {'invalid': _l('Player selection is malformed.')}
+
+    def _deserialize(self, value, attr, data, **kwargs):
+        if value is None or value == '':
+            return []
+        if isinstance(value, (list, tuple)):
+            parts = value
+        else:
+            parts = str(value).split(',')
+        try:
+            return [int(part) for part in (str(p).strip() for p in parts) if part]
+        except (TypeError, ValueError) as exc:
+            raise self.make_error('invalid') from exc
+
+
+class ScheduledEventSchema(StripMixin):
+    """What every scheduled thing has: a title, a day, and a window on it.
+
+    Shared by matches and team matches, which is also what BaseMatch says at
+    the model level. Times are real time objects here rather than strings —
+    the point of validating at the boundary is that a route never handles a
+    '18:00' again.
+    """
+
+    title = fields.String(
+        required=True,
+        validate=validate.Length(min=1, max=200, error=_l('A title is required.')),
+    )
+    description = fields.String(
+        validate=validate.Length(max=5000),
+        allow_none=True,
+        load_default=None,
+    )
+    date = fields.Date(
+        required=True,
+        error_messages={'invalid': _l('Invalid date format.')},
+    )
+    start_time = fields.Time(
+        required=True,
+        error_messages={
+            'invalid': _l('Invalid time format.'),
+            'required': _l('Start time is required. Please select a time slot.'),
+        },
+    )
+    end_time = fields.Time(
+        allow_none=True,
+        load_default=None,
+        error_messages={'invalid': _l('Invalid time format.')},
+    )
+    location = fields.String(
+        validate=validate.Length(max=200),
+        allow_none=True,
+        load_default=None,
+    )
+    status = fields.String(
+        validate=validate.OneOf(MATCH_STATUSES, error=_l('Unknown match status.')),
+        load_default='scheduled',
+    )
+
+    @validates_schema
+    def validate_window(self, data, **kwargs):
+        """An event cannot end before it starts.
+
+        Nothing checked this. A match from 20:00 to 18:00 was accepted, shown
+        on the calendar as a negative-length block, and announced by Discord
+        as exactly that.
+        """
+        start = data.get('start_time')
+        end = data.get('end_time')
+        if start and end and end <= start:
+            raise ValidationError(
+                _l('The end time must come after the start time.'), field_name='end_time'
+            )
+
+
+class MatchSchema(ScheduledEventSchema):
+    """A match inside a tryout.
+
+    match_type is required on creation and immutable afterwards — the edit
+    form posts it as a hidden field and the route reads it off the record,
+    not off the form.
+    """
+
+    match_type = fields.String(
+        required=True,
+        validate=validate.OneOf(MATCH_TYPES, error=_l('Unknown match type.')),
+    )
+    team1_id = fields.Integer(allow_none=True, load_default=None)
+    team2_id = fields.Integer(allow_none=True, load_default=None)
+    team1_player_ids = CommaSeparatedIds(load_default=list)
+    team2_player_ids = CommaSeparatedIds(load_default=list)
+    player_ids = fields.List(fields.Integer(), load_default=list)
+
+    @validates_schema
+    def validate_sides(self, data, **kwargs):
+        """A team cannot play itself."""
+        if data.get('team1_id') and data.get('team1_id') == data.get('team2_id'):
+            raise ValidationError(_l('A team cannot play against itself.'), field_name='team2_id')
+
+
+class MatchEditSchema(MatchSchema):
+    """The same match, being edited.
+
+    match_type is not accepted here at all: it decides how participants are
+    drawn, and changing it on an existing match would leave the old ones
+    behind. The route takes it from the record.
+    """
+
+    match_type = fields.String(load_default=None)
+
+
+class TeamMatchSchema(ScheduledEventSchema):
+    """A regular-season match for an organisation team."""
+
+    opponent = fields.String(
+        validate=validate.Length(max=200),
+        allow_none=True,
+        load_default=None,
+    )
+    is_practice = fields.Boolean(load_default=False)
diff --git a/tests/test_match_scheduling.py b/tests/test_match_scheduling.py
new file mode 100644
index 0000000..f7ae3cb
--- /dev/null
+++ b/tests/test_match_scheduling.py
@@ -0,0 +1,322 @@
+"""Scheduling a match, through the form (ARCH-005).
+
+Before this, `matches.py` read fifteen fields off `request.form` by hand and
+believed all of them. What that produced was not loud:
+
+  - `edit_match` caught a bad time and set `start_time = None`, then said the
+    match had been updated. The match lost its time and the calendar showed
+    it at midnight;
+  - `match_type` was accepted as any string. An unknown one created a match
+    with no participants and no complaint;
+  - an end time before the start was stored as given;
+  - `title` is NOT NULL in the model and unvalidated in the route, so an
+    empty one was a 500.
+
+The route now loads a schema and reports every rejection the same way.
+"""
+
+from datetime import date, time
+
+import pytest
+
+from app.extensions import db
+from app.models import (
+    Match,
+    MatchParticipant,
+    OrgTeam,
+    Team,
+    TeamMatch,
+    TeamMember,
+    Tryout,
+)
+
+
+@pytest.fixture
+def tryout_setup(app, as_role, make_user):
+    """A tryout run by the logged-in admin, with two teams and four players."""
+    admin_id = as_role('admin')
+    player_ids = [make_user('player') for _ in range(4)]
+
+    with app.app_context():
+        org_team = OrgTeam(name='Varsity', created_by=admin_id)
+        db.session.add(org_team)
+        db.session.flush()
+
+        tryout = Tryout(
+            title='Spring',
+            game='Valorant',
+            date=date(2030, 4, 1),
+            created_by=admin_id,
+            target_org_team_id=org_team.id,
+        )
+        db.session.add(tryout)
+        db.session.flush()
+
+        alpha = Team(tryout_id=tryout.id, name='Alpha', created_by=admin_id)
+        beta = Team(tryout_id=tryout.id, name='Beta', created_by=admin_id)
+        db.session.add_all([alpha, beta])
+        db.session.flush()
+
+        db.session.add_all(
+            [
+                TeamMember(team_id=alpha.id, player_id=player_ids[0]),
+                TeamMember(team_id=alpha.id, player_id=player_ids[1]),
+                TeamMember(team_id=beta.id, player_id=player_ids[2]),
+                TeamMember(team_id=beta.id, player_id=player_ids[3]),
+            ]
+        )
+        db.session.commit()
+
+        return {
+            'tryout_id': tryout.id,
+            'alpha_id': alpha.id,
+            'beta_id': beta.id,
+            'players': player_ids,
+        }
+
+
+VALID = {
+    'title': 'Scrim night',
+    'date': '2030-04-01',
+    'start_time': '18:00',
+    'end_time': '20:00',
+    'location': 'Arena',
+    'match_type': 'player_scrim',
+}
+
+
+def _create(client, setup, **overrides):
+    payload = dict(VALID)
+    payload.update(overrides)
+    return client.post(f'/matches/create/{setup["tryout_id"]}', data=payload, follow_redirects=True)
+
+
+def _only_match(app):
+    with app.app_context():
+        return Match.query.one_or_none()
+
+
+class TestCreating:
+    def test_a_valid_scrim_is_stored_with_typed_values(self, app, client, tryout_setup):
+        _create(client, tryout_setup, player_ids=[str(p) for p in tryout_setup['players'][:2]])
+
+        match = _only_match(app)
+        assert match is not None
+        assert match.title == 'Scrim night'
+        assert match.date == date(2030, 4, 1)
+        assert match.start_time == time(18, 0)
+        assert match.end_time == time(20, 0)
+
+    def test_a_missing_end_time_defaults_to_thirty_minutes(self, app, client, tryout_setup):
+        _create(client, tryout_setup, end_time='')
+
+        assert _only_match(app).end_time == time(18, 30)
+
+    def test_a_team_match_draws_its_players_from_the_teams(self, app, client, tryout_setup):
+        _create(
+            client,
+            tryout_setup,
+            match_type='team_vs_team',
+            team1_id=str(tryout_setup['alpha_id']),
+            team2_id=str(tryout_setup['beta_id']),
+        )
+
+        with app.app_context():
+            participants = MatchParticipant.query.all()
+            assert len(participants) == 4
+            assert {p.team_side for p in participants} == {1, 2}
+
+    def test_a_player_vs_player_match_reads_the_comma_separated_ids(
+        self, app, client, tryout_setup
+    ):
+        players = tryout_setup['players']
+        _create(
+            client,
+            tryout_setup,
+            match_type='player_vs_player',
+            team1_player_ids=f'{players[0]},{players[1]}',
+            team2_player_ids=f'{players[2]},{players[3]}',
+        )
+
+        with app.app_context():
+            sides = {p.player_id: p.team_side for p in MatchParticipant.query.all()}
+            assert sides[players[0]] == 1
+            assert sides[players[3]] == 2
+
+
+class TestRefusals:
+    """Every one of these used to be accepted."""
+
+    def test_an_unknown_match_type_is_refused(self, app, client, tryout_setup):
+        """It used to create a match that no player was ever attached to."""
+        _create(client, tryout_setup, match_type='battle_royale')
+
+        assert _only_match(app) is None
+
+    def test_an_empty_title_is_refused(self, app, client, tryout_setup):
+        """title is NOT NULL: unvalidated, this was an IntegrityError."""
+        _create(client, tryout_setup, title='')
+
+        assert _only_match(app) is None
+
+    def test_an_end_before_the_start_is_refused(self, app, client, tryout_setup):
+        _create(client, tryout_setup, start_time='20:00', end_time='18:00')
+
+        assert _only_match(app) is None
+
+    def test_a_malformed_time_is_refused(self, app, client, tryout_setup):
+        _create(client, tryout_setup, start_time='six o clock')
+
+        assert _only_match(app) is None
+
+    def test_a_malformed_date_is_refused(self, app, client, tryout_setup):
+        _create(client, tryout_setup, date='next tuesday')
+
+        assert _only_match(app) is None
+
+    def test_a_team_cannot_play_itself(self, app, client, tryout_setup):
+        _create(
+            client,
+            tryout_setup,
+            match_type='team_vs_team',
+            team1_id=str(tryout_setup['alpha_id']),
+            team2_id=str(tryout_setup['alpha_id']),
+        )
+
+        assert _only_match(app) is None
+
+    def test_a_malformed_player_selection_is_refused_not_crashed(self, app, client, tryout_setup):
+        """'a,b' reached int() unguarded and was a 500."""
+        response = _create(
+            client, tryout_setup, match_type='player_vs_player', team1_player_ids='a,b'
+        )
+
+        assert response.status_code == 200
+        assert _only_match(app) is None
+
+
+class TestEditing:
+    def _edit(self, client, app, tryout_setup, **overrides):
+        _create(client, tryout_setup)
+        match = _only_match(app)
+        payload = dict(VALID, title='Renamed', status='scheduled')
+        payload.update(overrides)
+        return client.post(
+            f'/matches/{match.id}/edit', data=payload, follow_redirects=True
+        ), match.id
+
+    def test_a_valid_edit_is_applied(self, app, client, tryout_setup):
+        _, match_id = self._edit(client, app, tryout_setup)
+
+        with app.app_context():
+            assert db.session.get(Match, match_id).title == 'Renamed'
+
+    def test_a_bad_time_no_longer_wipes_the_one_that_was_there(self, app, client, tryout_setup):
+        """The defect this whole change exists for.
+
+        `except ValueError: match.start_time = None` — the form was accepted,
+        the time was destroyed, and the page said the match had been updated.
+        """
+        _, match_id = self._edit(client, app, tryout_setup, start_time='25:99')
+
+        with app.app_context():
+            match = db.session.get(Match, match_id)
+            assert match.start_time == time(18, 0), 'the stored time must survive a bad edit'
+            assert match.title == 'Scrim night', 'and so must everything else on the form'
+
+    def test_an_unknown_status_is_refused_rather_than_ignored(self, app, client, tryout_setup):
+        _, match_id = self._edit(client, app, tryout_setup, status='postponed')
+
+        with app.app_context():
+            assert db.session.get(Match, match_id).title == 'Scrim night'
+
+    def test_the_match_type_cannot_be_changed_by_the_form(self, app, client, tryout_setup):
+        """It decides how participants are drawn; changing it would strand
+        the ones already attached."""
+        _, match_id = self._edit(client, app, tryout_setup, match_type='team_vs_team')
+
+        with app.app_context():
+            assert db.session.get(Match, match_id).match_type == 'player_scrim'
+
+
+class TestTeamMatchEditing:
+    """Regular-season matches went through the same treatment.
+
+    Their edit path checked date, start time and end time one at a time,
+    each flashing and redirecting on its own — so a mistyped end time threw
+    away everything the person had typed into the other ten fields.
+    """
+
+    @pytest.fixture
+    def team_match(self, app, as_role):
+        admin_id = as_role('admin')
+        with app.app_context():
+            org_team = OrgTeam(name='Varsity', created_by=admin_id)
+            db.session.add(org_team)
+            db.session.flush()
+
+            match = TeamMatch(
+                org_team_id=org_team.id,
+                title='League night',
+                date=date(2030, 5, 1),
+                start_time=time(19, 0),
+                end_time=time(21, 0),
+                created_by=admin_id,
+            )
+            db.session.add(match)
+            db.session.commit()
+            return match.id
+
+    VALID = {
+        'title': 'League night',
+        'date': '2030-05-01',
+        'start_time': '19:00',
+        'end_time': '21:00',
+        'status': 'scheduled',
+    }
+
+    def _edit(self, client, match_id, **overrides):
+        return client.post(
+            f'/team-matches/{match_id}/edit',
+            data=dict(self.VALID, **overrides),
+            follow_redirects=True,
+        )
+
+    def test_a_valid_edit_is_applied(self, app, client, team_match):
+        self._edit(client, team_match, title='Renamed', location='Arena')
+
+        with app.app_context():
+            match = db.session.get(TeamMatch, team_match)
+            assert match.title == 'Renamed'
+            assert match.location == 'Arena'
+
+    def test_a_bad_end_time_changes_nothing_and_says_so_in_place(self, app, client, team_match):
+        """It used to redirect, one redirect per bad field.
+
+        Known limit, and the reason this asserts on the message rather than
+        on the inputs: the form is re-rendered from the stored record, so the
+        submitted values are not echoed back. Every problem is now reported
+        at once and in place, which is the part that changed.
+        """
+        response = self._edit(client, team_match, title='Renamed', end_time='half past nine')
+
+        with app.app_context():
+            match = db.session.get(TeamMatch, team_match)
+            assert match.title == 'League night'
+            assert match.end_time == time(21, 0)
+        assert 'alert-danger' in response.get_data(as_text=True)
+
+    def test_an_end_before_the_start_is_refused(self, app, client, team_match):
+        self._edit(client, team_match, start_time='21:00', end_time='19:00')
+
+        with app.app_context():
+            assert db.session.get(TeamMatch, team_match).start_time == time(19, 0)
+
+    def test_an_empty_title_is_refused(self, app, client, team_match):
+        """`request.form.get('title', team_match.title)` only defaulted on an
+        absent key, and a form always sends the key — so a cleared title was
+        stored as an empty string in a NOT NULL column."""
+        self._edit(client, team_match, title='')
+
+        with app.app_context():
+            assert db.session.get(TeamMatch, team_match).title == 'League night'