Prevent creating custom kaehmy role with existing name

webapp/forms.py

@@ -38,7 +38,15 @@ class KaehmyForm_Form(forms.ModelForm):
         if number.isdigit():
             return number
         else:
-            raise ValidationError(_('Invalid value'))
+            raise ValidationError(_('Invalid phone number'))
+
+    def clean_custom_role_name(self):
+        """Check that no other custom role with same name exists."""
+        custom_name = self.cleaned_data.get('custom_role_name')
+        if CustomKaehmyRole.objects.get(name=custom_name) is None:
+            return custom_name
+        else:
+            raise ValidationError(_('Custom role with the same name already exists.'))
 
 
 class KaehmyCommentForm(forms.ModelForm):

webapp/views.py

@@ -235,7 +235,8 @@ def kaehmy_comment(request, *args, **kwargs):
                 'Käy lukemassa viesti osoitteessa http://sika.sahkoinsinoorikilta.fi/kaehmy').format(name.capitalize())
 
         send_email(email, subject, body)
-        logging.debug('Sent kaehmy comment email to recipient <{}>'.format(email))
+        logging.debug(
+            'Sent kaehmy comment email to recipient <{}>'.format(email))
 
         return redirect('/kaehmy')
     else: