diff --git a/bda/admin.py b/bda/admin.py
index 02eebad5..0cc66d43 100644
--- a/bda/admin.py
+++ b/bda/admin.py
@@ -29,55 +29,46 @@ class ChoixSpectacleInline(admin.TabularInline):
     sortable_field_name = "priority"
 
 
-class AttributionAdminForm(forms.ModelForm):
+class AttributionTabularAdminForm(forms.ModelForm):
+    listing = None
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.fields['spectacle'].queryset = (
-            Spectacle.objects
-            .select_related('location')
-        )
+        spectacles = Spectacle.objects.select_related('location')
+        if self.listing is not None:
+            spectacles = spectacles.filter(listing=self.listing)
+        self.fields['spectacle'].queryset = spectacles
 
 
-class AttributionNoListingAdminForm(AttributionAdminForm):
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.fields['spectacle'].queryset = (
-            self.fields['spectacle'].queryset
-            .filter(listing=False)
-        )
+class WithoutListingAttributionTabularAdminForm(AttributionTabularAdminForm):
+    listing = False
 
 
-class AttributionListingAdminForm(AttributionAdminForm):
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.fields['spectacle'].queryset = (
-            self.fields['spectacle'].queryset
-            .filter(listing=True)
-        )
+class WithListingAttributionTabularAdminForm(AttributionTabularAdminForm):
+    listing = True
 
 
-class AttributionInlineListing(admin.TabularInline):
+class AttributionInline(admin.TabularInline):
     model = Attribution
     extra = 0
-    form = AttributionListingAdminForm
+    listing = None
 
     def get_queryset(self, request):
         qs = super().get_queryset(request)
-        return qs.filter(spectacle__listing=True)
+        if self.listing is not None:
+            qs.filter(spectacle__listing=self.listing)
+        return qs
 
 
-class AttributionInlineNoListing(admin.TabularInline):
-    model = Attribution
+class WithListingAttributionInline(AttributionInline):
+    form = WithListingAttributionTabularAdminForm
+    listing = True
+
+
+class WithoutListingAttributionInline(AttributionInline):
     exclude = ('given', )
-    extra = 0
-    form = AttributionNoListingAdminForm
-
-    def get_queryset(self, request):
-        qs = super().get_queryset(request)
-        return qs.filter(spectacle__listing=False)
+    form = WithoutListingAttributionTabularAdminForm
+    listing = False
 
 
 class ParticipantAdminForm(forms.ModelForm):
@@ -91,7 +82,7 @@ class ParticipantAdminForm(forms.ModelForm):
 
 
 class ParticipantAdmin(ReadOnlyMixin, admin.ModelAdmin):
-    inlines = [AttributionInlineListing, AttributionInlineNoListing]
+    inlines = [WithListingAttributionInline, WithoutListingAttributionInline]
 
     def get_queryset(self, request):
         return Participant.objects.annotate(nb_places=Count('attributions'),