Enhance Club Selection Form in EventAdmin Action

Refactors the set_club_action method to improve form handling: - Add
validation for club selection - Improve form initialization with hidden
fields - Update template to match Django admin form conventions - Add
error handling and more robust user feedback

tournaments/admin.py

@@ -151,12 +151,15 @@ class EventAdmin(SyncedObjectAdmin):
         """Action to set club for selected events"""
         from django import forms
         from django.contrib.admin.widgets import ForeignKeyRawIdWidget
+        from django.contrib.admin import helpers
+        from django.core.exceptions import ValidationError
 
         class ClubSelectionForm(forms.Form):
-            club = forms.ModelChoiceField(
-                queryset=Club.objects.all(),
-                required=True,
+            _selected_action = forms.CharField(widget=forms.MultipleHiddenInput)
+            action = forms.CharField(widget=forms.HiddenInput)
+            club_id = forms.CharField(
                 label='Club',
+                required=True,
                 help_text='Enter Club ID or use the search icon to find a club',
                 widget=ForeignKeyRawIdWidget(
                     Event._meta.get_field('club').remote_field,
@@ -164,10 +167,20 @@ class EventAdmin(SyncedObjectAdmin):
                 )
             )
 
+            def clean_club_id(self):
+                club_id = self.cleaned_data['club_id']
+                try:
+                    club = Club.objects.get(pk=club_id)
+                    return club
+                except Club.DoesNotExist:
+                    raise ValidationError(f'Club with ID {club_id} does not exist.')
+                except (ValueError, TypeError) as e:
+                    raise ValidationError(f'Invalid Club ID format: {club_id}')
+
         if 'apply' in request.POST:
             form = ClubSelectionForm(request.POST)
             if form.is_valid():
-                club = form.cleaned_data['club']
+                club = form.cleaned_data['club_id']  # This is now a Club instance
                 updated_count = queryset.update(club=club)
                 self.message_user(
                     request,
@@ -175,14 +188,28 @@ class EventAdmin(SyncedObjectAdmin):
                     messages.SUCCESS
                 )
                 return None
-        else:
-            form = ClubSelectionForm()
+            else:
+                # Show form errors
+                self.message_user(
+                    request,
+                    f'Form validation failed. Errors: {form.errors}',
+                    messages.ERROR
+                )
+
+        # Initial form display
+        form = ClubSelectionForm(initial={
+            '_selected_action': request.POST.getlist(helpers.ACTION_CHECKBOX_NAME),
+            'action': 'set_club_action',
+        })
 
         context = {
             'form': form,
             'events': queryset,
+            'action_checkbox_name': helpers.ACTION_CHECKBOX_NAME,
             'action_name': 'set_club_action',
             'title': 'Set Club for Events',
+            'media': form.media,
+            'has_change_permission': True,
         }
         return render(request, 'admin/tournaments/set_club_action.html', context)
 

tournaments/templates/admin/tournaments/set_club_action.html

@@ -3,7 +3,21 @@
 
 {% block extrahead %}
     {{ block.super }}
-    {{ form.media }}
+    {{ media }}
+    <script type="text/javascript" src="{% url 'admin:jsi18n' %}"></script>
+{% endblock %}
+
+{% block extrastyle %}
+    {{ block.super }}
+    <link rel="stylesheet" type="text/css" href="{% static 'admin/css/forms.css' %}">
+{% endblock %}
+
+{% block breadcrumbs %}
+<div class="breadcrumbs">
+    <a href="{% url 'admin:index' %}">Home</a>
+    &rsaquo; <a href="{% url 'admin:tournaments_event_changelist' %}">Events</a>
+    &rsaquo; Set Club
+</div>
 {% endblock %}
 
 {% block content %}
@@ -26,41 +40,42 @@
     </ul>
 </div>
 
-<form method="post">
+<form method="post" id="club-form" action="">
     {% csrf_token %}
 
+    {# Hidden fields to preserve the selection #}
+    {% for hidden in form.hidden_fields %}
+        {{ hidden }}
+    {% endfor %}
+
+    {% if form.non_field_errors %}
+        <div class="errors">
+            {{ form.non_field_errors }}
+        </div>
+    {% endif %}
+
     <div style="margin: 20px 0;">
-        <div class="form-row">
-            {{ form.club.errors }}
-            <div>
-                <label for="{{ form.club.id_for_label }}">{{ form.club.label }}:</label>
-                <div class="help">{{ form.club.help_text }}</div>
-                {{ form.club }}
+        <fieldset class="module aligned">
+            <div class="form-row field-club_id">
+                <div>
+                    <label for="{{ form.club_id.id_for_label }}" class="required">{{ form.club_id.label }}:</label>
+                    <div class="related-widget-wrapper">
+                        {{ form.club_id }}
+                    </div>
+                    {% if form.club_id.help_text %}
+                        <div class="help">{{ form.club_id.help_text }}</div>
+                    {% endif %}
+                    {% if form.club_id.errors %}
+                        <div class="errors">{{ form.club_id.errors }}</div>
+                    {% endif %}
+                </div>
             </div>
-        </div>
+        </fieldset>
     </div>
 
-    <div style="margin-top: 20px;">
-        <input type="submit" name="apply" value="Set Club" class="button default" style="
-            background-color: #417690;
-            color: white;
-            padding: 10px 20px;
-            border: none;
-            border-radius: 4px;
-            cursor: pointer;
-            font-size: 14px;
-            margin-right: 10px;
-        "/>
-
-        <a href="{% url 'admin:tournaments_event_changelist' %}" class="button" style="
-            display: inline-block;
-            padding: 10px 20px;
-            background-color: #6c757d;
-            color: white;
-            text-decoration: none;
-            border-radius: 4px;
-            font-size: 14px;
-        ">Cancel</a>
+    <div class="submit-row" style="margin-top: 20px; padding: 10px; text-align: right;">
+        <input type="submit" name="apply" value="Set Club" class="default" style="margin-right: 10px;"/>
+        <a href="{% url 'admin:tournaments_event_changelist' %}" class="button cancel-link">Cancel</a>
     </div>
 </form>
 {% endblock %}