Bugfix #117: API Event tags

Add API for tags so events can get the related field.

webapp/serializers.py

@@ -14,19 +14,28 @@ class EventSerializer(serializers.HyperlinkedModelSerializer):
     signup_id = serializers.PrimaryKeyRelatedField(
         many=True,
         source="signupForm",
-        queryset=SignupForm.objects.all())
+        queryset=SignupForm.objects.all()
+    )
+    tag_id = serializers.PrimaryKeyRelatedField(
+        many=True,
+        source="tags",
+        queryset=Tag.objects.all()
+    )
 
     class Meta:
         model = Event
-        fields = ('id', 'tags', 'visible', 'title', 'description',
+        fields = ('id', 'tag_id', 'tags', 'visible', 'title', 'description',
                   'content', 'start_time', 'end_time', 'signup_id', 'signupForm')
         depth = 1
 
     def create(self, validated_data):
         signupForms = validated_data.pop('signupForm')
+        tags = validated_data.pop('tags')
         event = Event.objects.create(**validated_data)
         for form in signupForms:
             event.signupForm.add(form)
+        for tag in tags:
+            event.tags.add(tag)
         event.save()
         return event