old_contents: from django.contrib import admin
  
  from coach.models import Coach
  from core.models import EventPageContent
  
  
  class CoachInline(admin.TabularInline):
      model = EventPageContent.coaches.through
      extra = 1
      verbose_name_plural = 'Coaches'
  
  
  class CoachAdmin(admin.ModelAdmin):
      list_display = ('name', 'photo_display_for_admin', 'twitter_handle', 'url')
      search_fields = ('name', 'twitter_handle', 'url')
  
      def get_queryset(self, request):
          qs = super().get_queryset(request)
          if request.user.is_superuser:
              return qs
          return qs.filter(eventpagecontent__event__team=request.user).distinct()
  
      def get_form(self, request, obj=None, **kwargs):
          form = super().get_form(request, obj, **kwargs)
          if not request.user.is_superuser:
              if 'eventpagecontent' in form.base_fields:
                  qs = EventPageContent.objects.filter(
                      event__team=request.user
                  )
                  form.base_fields['eventpagecontent'].queryset = qs
          return form
  
  
  admin.site.register(Coach, CoachAdmin)
  
new_contents: from django.contrib import admin
  
  from coach.models import Coach
  from core.models import EventPageContent
  
  
  class CoachInline(admin.TabularInline):
      model = EventPageContent.coaches.through
      extra = 1
      verbose_name_plural = 'Coaches'
  
  
  class CoachAdmin(admin.ModelAdmin):
      list_display = ('name', 'photo_display_for_admin', 'twitter_handle', 'url')
      search_fields = ('name', 'twitter_handle', 'url')
  
      def get_queryset(self, request):
          qs = super().get_queryset(request)
          if request.user.is_superuser:
              return qs
          return qs.filter(eventpagecontent__event__team=request.user)
  
      def get_form(self, request, obj=None, **kwargs):
          form = super().get_form(request, obj, **kwargs)
          if not request.user.is_superuser:
              if 'eventpagecontent' in form.base_fields:
                  qs = EventPageContent.objects.filter(
                      event__team=request.user
                  )
                  form.base_fields['eventpagecontent'].queryset = qs
          return form
  
  
  admin.site.register(Coach, CoachAdmin)
  
subject: Remove distinct from the coaches queryset to allow deletion. [#739]