Validates open posts field of assignment form (Fixes #2623)

openslides/assignments/serializers.py

@@ -22,6 +22,15 @@ from .models import (
 )
 
 
+def posts_validator(data):
+    """
+    Validator for open posts. It checks that the values for the open posts are greater than 0.
+    """
+    if (data['open_posts'] and data['open_posts'] is not None and data['open_posts'] < 1):
+        raise ValidationError({'detail': _('Value for {} must be greater than 0').format('open_posts')})
+    return data
+
+
 class AssignmentRelatedUserSerializer(ModelSerializer):
     """
     Serializer for assignment.models.AssignmentRelatedUser objects.
@@ -198,6 +207,7 @@ class AssignmentFullSerializer(ModelSerializer):
             'polls',
             'agenda_item_id',
             'tags',)
+        validators = (posts_validator,)
 
 
 class AssignmentShortSerializer(AssignmentFullSerializer):
@@ -220,3 +230,4 @@ class AssignmentShortSerializer(AssignmentFullSerializer):
             'polls',
             'agenda_item_id',
             'tags',)
+        validators = (posts_validator,)

openslides/assignments/static/js/assignments/site.js

@@ -180,6 +180,7 @@ angular.module('OpenSlidesApp.assignments.site', [
                     templateOptions: {
                         label: gettextCatalog.getString('Number of persons to be elected'),
                         type: 'number',
+                        min: 1,
                         required: true
                     }
                 },