Add id to Tag data

webapp/serializers.py

@@ -66,9 +66,10 @@ class SavedQuestionsSerializer(serializers.ModelSerializer):
         fields = ('id', 'name', 'question')
 
 class TagSerializer(serializers.ModelSerializer):
+    id = serializers.ReadOnlyField()
     class Meta:
         tag = Tag
-        fields = ('slug', 'name', 'icon')
+        fields = ('id', 'slug', 'name', 'icon')
 
 class FeedSerializer(serializers.ModelSerializer):
     tags = TagSerializer(many=True, read_only=True, required=True)