Prevent lower api to erase higher namespace

Before, an API plugged to a namespace (for instance /account/{pk}/)
would erase API plugged to the same namespace with additional URL
segments: (for instance /account/{user_id}/book/{pk}/)

rest_framework/schemas.py

@@ -176,18 +176,16 @@ class SchemaGenerator(object):
         Return a tuple of strings, indicating the identity to use for a
         given endpoint. eg. ('users', 'list').
         """
-        category = None
+        category = []
         for item in path.strip('/').split('/'):
             if '{' in item:
-                break
+                continue
-            category = item
+            category.append(item)
 
         actions = getattr(callback, 'actions', self.default_mapping)
         action = actions[method.lower()]
 
-        if category:
+        return (' '.join(category), action)
-            return (category, action)
-        return (action,)
 
     # Methods for generating each individual `Link` instance...
 

tests/test_schemas.py

@@ -6,7 +6,7 @@ from django.test import TestCase, override_settings
 from rest_framework import filters, pagination, permissions, serializers
 from rest_framework.compat import coreapi
 from rest_framework.response import Response
-from rest_framework.routers import DefaultRouter
+from rest_framework.routers import DefaultRouter, SimpleRouter
 from rest_framework.schemas import SchemaGenerator
 from rest_framework.test import APIClient
 from rest_framework.views import APIView
@@ -55,6 +55,14 @@ urlpatterns2 = [
 ]
 
 
+router = SimpleRouter()
+router.register('example', ExampleViewSet, base_name='example')
+urlpatterns3 = [
+    url(r'^', include(router.urls)),
+    url(r'^(?P<example_id>\w+)/example-view/$', ExampleView.as_view(), name='example-view')
+]
+
+
 @unittest.skipUnless(coreapi, 'coreapi is not installed')
 @override_settings(ROOT_URLCONF='tests.test_schemas')
 class TestRouterGeneratedSchema(TestCase):
@@ -179,3 +187,87 @@ class TestSchemaGenerator(TestCase):
             }
         )
         self.assertEquals(schema, expected)
+
+
+@unittest.skipUnless(coreapi, 'coreapi is not installed')
+class TestSchemaAndSubSchemaGenerator(TestCase):
+    def test_view(self):
+        schema_generator = SchemaGenerator(title='Test View', patterns=urlpatterns3)
+        schema = schema_generator.get_schema()
+        expected = coreapi.Document(
+            url='',
+            title='Test View',
+            content={
+                'example': {
+                    'list': coreapi.Link(
+                        url='/example/',
+                        action='get',
+                        fields=[
+                            coreapi.Field('page', required=False, location='query'),
+                            coreapi.Field('ordering', required=False, location='query')
+                        ]
+                    ),
+                    'create': coreapi.Link(
+                        url='/example/',
+                        action='post',
+                        encoding='application/json',
+                        fields=[
+                            coreapi.Field('a', required=True, location='form', description='About a'),
+                            coreapi.Field('b', required=False, location='form', description='About b')
+                        ]
+                    ),
+                    'retrieve': coreapi.Link(
+                        url='/example/{pk}/',
+                        action='get',
+                        fields=[
+                            coreapi.Field('pk', required=True, location='path')
+                        ]
+                    ),
+                    'update': coreapi.Link(
+                        url='/example/{pk}/',
+                        action='put',
+                        encoding='application/json',
+                        fields=[
+                            coreapi.Field('pk', required=True, location='path'),
+                            coreapi.Field('a', required=True, location='form', description='About a'),
+                            coreapi.Field('b', required=False, location='form', description='About b')
+                        ]
+                    ),
+                    'partial_update': coreapi.Link(
+                        url='/example/{pk}/',
+                        action='patch',
+                        encoding='application/json',
+                        fields=[
+                            coreapi.Field('pk', required=True, location='path'),
+                            coreapi.Field('a', required=False, location='form', description='About a'),
+                            coreapi.Field('b', required=False, location='form', description='About b')
+                        ]
+                    ),
+                    'destroy': coreapi.Link(
+                        url='/example/{pk}/',
+                        action='delete',
+                        fields=[
+                            coreapi.Field('pk', required=True, location='path')
+                        ]
+                    )
+                },
+                'example-view': {
+                    'create': coreapi.Link(
+                        url='/{example_id}/example-view/',
+                        action='post',
+                        fields=[
+                            coreapi.Field('example_id', required=True, location='path')
+                        ]
+                    ),
+                    'read': coreapi.Link(
+                        url='/{example_id}/example-view/',
+                        action='get',
+                        description='get documentation',
+                        fields=[
+                            coreapi.Field('example_id', required=True, location='path')
+                        ]
+                    )
+                },
+            }
+        )
+        self.assertEquals(schema, expected)