add translations

election/forms.py

@@ -106,15 +106,6 @@ class RoleForm(forms.ModelForm):
             is_board=True, club__in=election.clubs.all()
         )
 
-    def clean(self):
-        cleaned_data = super().clean()
-        title = cleaned_data.get("title")
-        election = cleaned_data.get("election")
-        if Role.objects.filter(title=title, election=election).exists():
-            raise forms.ValidationError(
-                _("This role already exists for this election"), code="invalid"
-            )
-
 
 class ElectionListForm(forms.ModelForm):
     class Meta:

election/migrations/0006_role_club_role_alter_role_description.py

@@ -50,4 +50,13 @@ class Migration(migrations.Migration):
                 default=1, verbose_name="max choice"
             ),
         ),
+        migrations.AddConstraint(
+            model_name="role",
+            constraint=models.UniqueConstraint(
+                fields=("title", "election"),
+                name="title_election_unique_constraint",
+                violation_error_code="invalid",
+                violation_error_message="This role already exists for this election",
+            ),
+        ),
     ]

election/models.py

@@ -130,6 +130,16 @@ class Role(OrderedModel):
 
     order_with_respect_to = "election"
 
+    class Meta(OrderedModel.Meta):
+        constraints = [
+            models.UniqueConstraint(
+                fields=["title", "election"],
+                name="title_election_unique_constraint",
+                violation_error_message=_("This role already exists for this election"),
+                violation_error_code="invalid",
+            )
+        ]
+
     def __str__(self):
         return f"{self.title} - {self.election.title}"