feat: Add support for defining a custom serializer

djangoldp/__init__.py

@@ -4,4 +4,4 @@ __version__ = '0.0.0'
 options.DEFAULT_NAMES += (
     'lookup_field', 'rdf_type', 'rdf_context', 'auto_author', 'owner_field', 'view_set', 'container_path',
     'permission_classes', 'serializer_fields', 'nested_fields', 'depth', 'anonymous_perms', 'authenticated_perms',
-    'owner_perms')
+    'owner_perms', 'ldp_read_serializer', 'ldp_write_serializer')

djangoldp/views.py

+from inspect import isclass
+
 from django.apps import apps
 from django.conf import settings
-from django.conf.urls import url, include
+from django.conf.urls import include, url
 from django.contrib.auth import get_user_model
 from django.core.exceptions import FieldDoesNotExist
 from django.core.urlresolvers import get_resolver
@@ -20,7 +22,6 @@ from djangoldp.endpoints.webfinger import WebFingerEndpoint, WebFingerError
 from djangoldp.models import LDPSource, Model
 from djangoldp.permissions import LDPPermissions
 
-
 get_user_model()._meta.rdf_context = {"get_full_name": "rdfs:label"}
 
 
@@ -120,22 +121,39 @@ class LDPViewSet(LDPViewSetGenerator):
     def build_read_serializer(self):
         model_name = self.model._meta.object_name.lower()
         lookup_field = get_resolver().reverse_dict[model_name + '-detail'][0][0][1][0]
-        meta_args = {'model': self.model, 'extra_kwargs': {
-            '@id': {'lookup_field': lookup_field}},
-                     'depth': getattr(self, 'depth', Model.get_meta(self.model, 'depth', 0)),
-                     'extra_fields': self.nested_fields}
+        meta_args = {
+            "model": self.model,
+            "meta": self.model._meta,
+            "extra_kwargs": {
+                "@id": {"lookup_field": lookup_field}
+            },
+            "depth": getattr(self, "depth", Model.get_meta(self.model, "depth", 0)),
+            "extra_fields": self.nested_fields
+        }
         return self.build_serializer(meta_args, 'Read')
 
     def build_write_serializer(self):
         model_name = self.model._meta.object_name.lower()
-        lookup_field = get_resolver().reverse_dict[model_name + '-detail'][0][0][1][0]
-        meta_args = {'model': self.model, 'extra_kwargs': {
-            '@id': {'lookup_field': lookup_field}},
-                     'depth': 10,
-                     'extra_fields': self.nested_fields}
-        return self.build_serializer(meta_args, 'Write')
+        lookup_field = get_resolver().reverse_dict[model_name + "-detail"][0][0][1][0]
+        meta_args = {
+            "model": self.model,
+            "meta": self.model._meta,
+            "extra_kwargs": {
+                "@id": {"lookup_field": lookup_field}
+            },
+            "depth": 10,
+            "extra_fields": self.nested_fields
+        }
+        return self.build_serializer(meta_args, "Write")
 
     def build_serializer(self, meta_args, name_prefix):
+        #  If the model specifies a custom write serializer, let's respect that choice
+        lower_name_prefix = name_prefix.lower()
+        ldp_serializer = getattr(meta_args["meta"], "ldp_{}_serializer".format(lower_name_prefix), None)
+        from djangoldp.serializers import LDPSerializer
+        if isclass(ldp_serializer) and issubclass(ldp_serializer, LDPSerializer):
+            return ldp_serializer
+        
         if self.fields:
             meta_args['fields'] = self.fields
         else: