.

idhub/admin/views.py

@@ -870,7 +870,12 @@ class SchemasDeleteView(SchemasMix):
     def get(self, request, *args, **kwargs):
         self.check_valid_user()
         self.pk = kwargs['pk']
-        self.object = get_object_or_404(Schemas, pk=self.pk)
+        schema.vcredentials.filter(status=VerificableCredential.Status.ISSUED).count()
+        self.object = get_object_or_404(
+            Schemas,
+            pk=self.pk,
+            vcredentials__status=VerificableCredential.Status.ISSUED
+        )
         self.object.delete()
 
         return redirect('idhub:admin_schemas')

idhub/models.py

@@ -527,6 +527,11 @@ class Schemas(models.Model):
 
         return name
 
+    @property
+    def has_credentials(self, request=None):
+        return self.vcredentials.filter(
+            status=VerificableCredential.Status.ISSUED).exists()
+
     def _get_language_code(self, request=None):
         language_code = settings.LANGUAGE_CODE
         if request:

idhub/templates/idhub/admin/schemas.html

@@ -13,6 +13,7 @@
 </div>
 <!-- Modal -->
 {% for schema in object_list %}
+{% if not schema.has_credentials %}
 <div class="modal" id="confirm-delete-{{ schema.id }}" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
   <div class="modal-dialog">
     <div class="modal-content">
@@ -30,5 +31,6 @@
     </div>
   </div>
 </div>
+{% endif %}
 {% endfor %}
 {% endblock %}