Další drobné úpravy: admin_url potřebuje app_label

seminar/models/base.py

@@ -14,8 +14,9 @@ class SeminarModelBase(models.Model):
 	# 	return "https://" + str(get_current_site(None)) + self.verejne_url()
 
 	def admin_url(self):
+		app_name = self._meta.app_label
 		model_name = self.__class__.__name__.lower()
-		return reverse('admin:seminar_{}_change'.format(model_name), args=(self.id, ))
+		return reverse('admin:{}_{}_change'.format(app_name, model_name), args=(self.id, ))
 
 # def verejne_url(self):
 # 	return None

tvorba/models.py

@@ -522,7 +522,7 @@ class Problem(SeminarModelBase,PolymorphicModel):
 		return reverse('seminar_problem', kwargs={'pk': self.id})
 
 	def admin_url(self):
-			return reverse('admin:seminar_problem_change', args=(self.id, ))
+			return reverse('admin:tvorba_problem_change', args=(self.id, ))
 
 	@cached_property
 	def hlavni_problem(self):