Check resource name on included serializer in to_internal_value (django-json-api#306)

* Fix resource_name support for ResourceRelatedField

* Check resource name on included serializer in to_internal_value

* Revert "Fix resource_name support for ResourceRelatedField"

This reverts commit 484adc2.

* Improve identification of root serializer

* Add tests for resource_name support

* Fix field_name support in to_internal_value

* Refactor tests to use pytest monkeypatch

* Minor refactoring based on feedback

Author: czosel

AUTHORS

@@ -1,4 +1,5 @@
 Jerel Unruh <mail@unruhdesigns.com>
 Greg Aker <greg@gregaker.net>
 Adam Wróbel <https://adamwrobel.com>
+Christian Zosel <https://zosel.ch>
 

CHANGELOG.md

@@ -4,6 +4,7 @@ v2.3.0
   attributes and relations to snake\_case format. This conversion was unexpected
   and there was no way to turn it off.
 * Fix for apps that don't use `django.contrib.contenttypes`.
+* Fix `resource_name` support for POST requests and nested serializers
 
 v2.2.0
 

example/tests/integration/test_model_resource_name.py

@@ -1,9 +1,11 @@
 import pytest
-from django.core.urlresolvers import reverse
+from copy import deepcopy
+from example import models, serializers, views
+from example.tests.utils import dump_json, load_json
+from rest_framework import status
 
-from example.tests.utils import load_json
+from django.core.urlresolvers import reverse
 
-from example import models, serializers, views
 pytestmark = pytest.mark.django_db
 
 
@@ -37,6 +39,24 @@ def _check_relationship_and_included_comment_type_are_the_same(django_client, ur
 @pytest.mark.usefixtures("single_entry")
 class TestModelResourceName:
 
+    create_data = {
+        'data': {
+            'type': 'resource_name_from_JSONAPIMeta',
+            'id': None,
+            'attributes': {
+                'body': 'example',
+            },
+            'relationships': {
+                'entry': {
+                    'data': {
+                        'type': 'resource_name_from_JSONAPIMeta',
+                        'id': 1
+                    }
+                }
+            }
+        }
+    }
+
     def test_model_resource_name_on_list(self, client):
         models.Comment.__bases__ += (_PatchedModel,)
         response = client.get(reverse("comment-list"))
@@ -46,7 +66,7 @@ def test_model_resource_name_on_list(self, client):
             'resource_name from model incorrect on list')
 
     # Precedence tests
-    def test_resource_name_precendence(self, client):
+    def test_resource_name_precendence(self, client, monkeypatch):
         # default
         response = client.get(reverse("comment-list"))
         data = load_json(response.content)['data'][0]
@@ -61,29 +81,44 @@ def test_resource_name_precendence(self, client):
             'resource_name from model incorrect on list')
 
         # serializer > model
-        serializers.CommentSerializer.Meta.resource_name = "resource_name_from_serializer"
+        monkeypatch.setattr(serializers.CommentSerializer.Meta, 'resource_name', 'resource_name_from_serializer', False)
         response = client.get(reverse("comment-list"))
         data = load_json(response.content)['data'][0]
         assert (data.get('type') == 'resource_name_from_serializer'), (
             'resource_name from serializer incorrect on list')
 
         # view > serializer > model
-        views.CommentViewSet.resource_name = 'resource_name_from_view'
+        monkeypatch.setattr(views.CommentViewSet, 'resource_name', 'resource_name_from_view', False)
         response = client.get(reverse("comment-list"))
         data = load_json(response.content)['data'][0]
         assert (data.get('type') == 'resource_name_from_view'), (
             'resource_name from view incorrect on list')
 
+    def test_model_resource_name_create(self, client):
+        models.Comment.__bases__ += (_PatchedModel,)
+        models.Entry.__bases__ += (_PatchedModel,)
+        response = client.post(reverse("comment-list"),
+                               dump_json(self.create_data),
+                               content_type='application/vnd.api+json')
+
+        assert response.status_code == status.HTTP_201_CREATED
+
+    def test_serializer_resource_name_create(self, client, monkeypatch):
+        monkeypatch.setattr(serializers.CommentSerializer.Meta, 'resource_name', 'renamed_comments', False)
+        monkeypatch.setattr(serializers.EntrySerializer.Meta, 'resource_name', 'renamed_entries', False)
+        create_data = deepcopy(self.create_data)
+        create_data['data']['type'] = 'renamed_comments'
+        create_data['data']['relationships']['entry']['data']['type'] = 'renamed_entries'
+
+        response = client.post(reverse("comment-list"),
+                               dump_json(create_data),
+                               content_type='application/vnd.api+json')
+
+        assert response.status_code == status.HTTP_201_CREATED
+
     def teardown_method(self, method):
         models.Comment.__bases__ = (models.Comment.__bases__[0],)
-        try:
-            delattr(serializers.CommentSerializer.Meta, "resource_name")
-        except AttributeError:
-            pass
-        try:
-            delattr(views.CommentViewSet, "resource_name")
-        except AttributeError:
-            pass
+        models.Entry.__bases__ = (models.Entry.__bases__[0],)
 
 
 @pytest.mark.usefixtures("single_entry")

rest_framework_json_api/relations.py

@@ -1,8 +1,10 @@
 import collections
+import inflection
 import json
 
 from rest_framework.fields import MISSING_ERROR_MESSAGE, SerializerMethodField
 from rest_framework.relations import *
+from rest_framework.serializers import Serializer
 from django.utils.translation import ugettext_lazy as _
 from django.db.models.query import QuerySet
 
@@ -123,7 +125,12 @@ def to_internal_value(self, data):
                 self.fail('incorrect_type', data_type=type(data).__name__)
         if not isinstance(data, dict):
             self.fail('incorrect_type', data_type=type(data).__name__)
+
         expected_relation_type = get_resource_type_from_queryset(self.queryset)
+        serializer_resource_type = self.get_resource_type_from_included_serializer()
+
+        if serializer_resource_type is not None:
+            expected_relation_type = serializer_resource_type
 
         if 'type' not in data:
             self.fail('missing_type')
@@ -142,19 +149,44 @@ def to_representation(self, value):
         else:
             pk = value.pk
 
-        # check to see if this resource has a different resource_name when
-        # included and use that name
-        resource_type = None
-        root = getattr(self.parent, 'parent', self.parent)
-        field_name = self.field_name if self.field_name else self.parent.field_name
-        if getattr(root, 'included_serializers', None) is not None:
-            includes = get_included_serializers(root)
-            if field_name in includes.keys():
-                resource_type = get_resource_type_from_serializer(includes[field_name])
-
-        resource_type = resource_type if resource_type else get_resource_type_from_instance(value)
+        resource_type = self.get_resource_type_from_included_serializer()
+        if resource_type is None:
+            resource_type = get_resource_type_from_instance(value)
+
         return OrderedDict([('type', resource_type), ('id', str(pk))])
 
+    def get_resource_type_from_included_serializer(self):
+        """
+        Check to see it this resource has a different resource_name when
+        included and return that name, or None
+        """
+        field_name = self.field_name or self.parent.field_name
+        parent = self.get_parent_serializer()
+
+        if parent is not None:
+            # accept both singular and plural versions of field_name
+            field_names = [
+                inflection.singularize(field_name),
+                inflection.pluralize(field_name)
+            ]
+            includes = get_included_serializers(parent)
+            for field in field_names:
+                if field in includes.keys():
+                    return get_resource_type_from_serializer(includes[field])
+
+        return None
+
+    def get_parent_serializer(self):
+        if hasattr(self.parent, 'parent') and self.is_serializer(self.parent.parent):
+            return self.parent.parent
+        elif self.is_serializer(self.parent):
+            return self.parent
+
+        return None
+
+    def is_serializer(self, candidate):
+        return isinstance(candidate, Serializer)
+
     def get_choices(self, cutoff=None):
         queryset = self.get_queryset()
         if queryset is None:
@@ -219,4 +251,4 @@ def to_representation(self, value):
         if isinstance(value, collections.Iterable):
             base = super(SerializerMethodResourceRelatedField, self)
             return [base.to_representation(x) for x in value]
-        return super(SerializerMethodResourceRelatedField, self).to_representation(value)
+        return super(SerializerMethodResourceRelatedField, self).to_representation(value)