Versuch Admin-Ansicht zu reparieren

tournaments/admin.py

@@ -0,0 +1,38 @@
+from django.contrib import admin
+from .models import Tournament, Registration, Round, Match
+
+
+class RegistrationInline(admin.TabularInline):
+    model = Registration
+    extra = 0
+    # autocomplete_fields entfernt, um Startkonflikte zu vermeiden.
+    # Normale Select-Boxen sind für <= 50 Spieler besser!
+
+@admin.register(Tournament)
+class TournamentAdmin(admin.ModelAdmin):
+    list_display = ('name', 'date', 'participant_count')
+    search_fields = ('name',)
+    inlines = [RegistrationInline]
+
+    def participant_count(self, obj):
+        return obj.registrations.count()
+    participant_count.short_description = "Teilnehmer"
+
+
+class MatchInline(admin.TabularInline):
+    model = Match
+    extra = 0
+    # autocomplete_fields hier ebenfalls entfernt
+
+@admin.register(Round)
+class RoundAdmin(admin.ModelAdmin):
+    list_display = ('tournament', 'round_number')
+    list_filter = ('tournament',)
+    inlines = [MatchInline]
+
+
+@admin.register(Match)
+class MatchAdmin(admin.ModelAdmin):
+    list_display = ('round_detail', 'player_white', 'player_black', 'result')
+    list_filter = ('result', 'round_detail__tournament')
+