Class hierarchy cleaned

backend/migrations/0002_auto_20180830_1623.py

+# Generated by Django 2.0.3 on 2018-08-30 14:23
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('backend', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='countrytaggeditem',
+            name='country',
+            field=models.OneToOneField(on_delete=django.db.models.deletion.PROTECT, primary_key=True, related_name='country_items', serialize=False, to='backend.Country'),
+        ),
+    ]

backend/models/location/cityTaggedItem.py

 from django.db import models
-from backend.models.module import BasicModule, BasicModuleSerializer, BasicModuleViewSet
+from backend.models.tag import TaggedItem, TaggedItemSerializer, TaggedItemViewSet
 from backend.models.location import City
-from backend.models.tag import Tag
 
 
-class CityTaggedItem(BasicModule):
+class CityTaggedItem(TaggedItem):
     city = models.OneToOneField(
         City, on_delete=models.PROTECT, related_name='city_items', primary_key=True)
-    tag = models.ForeignKey(Tag, related_name='+', on_delete=models.PROTECT)
 
     @classmethod
     def get_serializer(cls):
@@ -17,13 +15,13 @@ class CityTaggedItem(BasicModule):
         unique_together = ('city', 'tag')
 
 
-class CityTaggedItemSerializer(BasicModuleSerializer):
+class CityTaggedItemSerializer(TaggedItemSerializer):
     class Meta:
         model = CityTaggedItem
         fields = '__all__'
 
 
-class CityTaggedItemViewSet(BasicModuleViewSet):
+class CityTaggedItemViewSet(TaggedItemViewSet):
 
     queryset = CityTaggedItem.objects.all()  # pylint: disable=E1101
     serializer_class = CityTaggedItemSerializer

backend/models/location/countryTaggedItem.py

 from django.db import models
-from backend.models.module import BasicModule, BasicModuleSerializer, BasicModuleViewSet
+from backend.models.tag import TaggedItem, TaggedItemSerializer, TaggedItemViewSet
 from backend.models.location import Country
-from backend.models.tag import Tag
 
 
-class CountryTaggedItem(BasicModule):
+class CountryTaggedItem(TaggedItem):
     country = models.OneToOneField(
-        Country, on_delete=models.PROTECT, related_name='city_items', primary_key=True)
-    tag = models.ForeignKey(Tag, related_name='+', on_delete=models.PROTECT)
+        Country, on_delete=models.PROTECT, related_name='country_items', primary_key=True)
 
     @classmethod
     def get_serializer(cls):
@@ -17,13 +15,13 @@ class CountryTaggedItem(BasicModule):
         unique_together = ('country', 'tag')
 
 
-class CountryTaggedItemSerializer(BasicModuleSerializer):
+class CountryTaggedItemSerializer(TaggedItemSerializer):
     class Meta:
         model = CountryTaggedItem
         fields = '__all__'
 
 
-class CountryTaggedItemViewSet(BasicModuleViewSet):
+class CountryTaggedItemViewSet(TaggedItemViewSet):
 
     queryset = CountryTaggedItem.objects.all()  # pylint: disable=E1101
     serializer_class = CountryTaggedItemSerializer

backend/models/tag/__init__.py

 from .tag import Tag, TagSerializer, TagViewSet  # noqa: F401
+from .taggedItem import TaggedItem, TaggedItemSerializer, TaggedItemViewSet  # noqa: F401

backend/models/tag/taggedItem.py

+from django.db import models
+from backend.models.module import BasicModule, BasicModuleSerializer, BasicModuleViewSet
+from .tag import Tag
+
+
+class TaggedItem(BasicModule):
+    tag = models.ForeignKey(Tag, related_name='+', on_delete=models.PROTECT)
+
+    class Meta:
+        abstract = True
+
+
+class TaggedItemSerializer(BasicModuleSerializer):
+    pass
+
+
+class TaggedItemViewSet(BasicModuleViewSet):
+    pass

backend/models/university/campusTaggedItem.py

 from django.db import models
-from backend.models.module import BasicModule, BasicModuleSerializer, BasicModuleViewSet
 from backend.models.university import Campus
-from backend.models.tag import Tag
+from backend.models.tag import TaggedItem, TaggedItemSerializer, TaggedItemViewSet
 
 
-class CampusTaggedItem(BasicModule):
+class CampusTaggedItem(TaggedItem):
     campus = models.OneToOneField(
         Campus, on_delete=models.PROTECT, related_name='city_items', primary_key=True)
-    tag = models.ForeignKey(Tag, related_name='+', on_delete=models.PROTECT)
 
     @classmethod
     def get_serializer(cls):
@@ -17,13 +15,13 @@ class CampusTaggedItem(BasicModule):
         unique_together = ('campus', 'tag')
 
 
-class CampusTaggedItemSerializer(BasicModuleSerializer):
+class CampusTaggedItemSerializer(TaggedItemSerializer):
     class Meta:
         model = CampusTaggedItem
         fields = '__all__'
 
 
-class CampusTaggedItemViewSet(BasicModuleViewSet):
+class CampusTaggedItemViewSet(TaggedItemViewSet):
 
     queryset = CampusTaggedItem.objects.all()  # pylint: disable=E1101
     serializer_class = CampusTaggedItemSerializer

backend/models/university/universityTaggedItem.py

 from django.db import models
-from backend.models.module import BasicModule, BasicModuleSerializer, BasicModuleViewSet
+from backend.models.tag import TaggedItem, TaggedItemSerializer, TaggedItemViewSet
 from backend.models.university import University
-from backend.models.tag import Tag
 
 
-class UniversityTaggedItem(BasicModule):
+class UniversityTaggedItem(TaggedItem):
     university = models.OneToOneField(
         University, on_delete=models.PROTECT, related_name='city_items', primary_key=True)
-    tag = models.ForeignKey(Tag, related_name='+', on_delete=models.PROTECT)
 
     @classmethod
     def get_serializer(cls):
@@ -17,13 +15,13 @@ class UniversityTaggedItem(BasicModule):
         unique_together = ('university', 'tag')
 
 
-class UniversityTaggedItemSerializer(BasicModuleSerializer):
+class UniversityTaggedItemSerializer(TaggedItemSerializer):
     class Meta:
         model = UniversityTaggedItem
         fields = '__all__'
 
 
-class UniversityTaggedItemViewSet(BasicModuleViewSet):
+class UniversityTaggedItemViewSet(TaggedItemViewSet):
 
     queryset = UniversityTaggedItem.objects.all()  # pylint: disable=E1101
     serializer_class = UniversityTaggedItemSerializer