From 77d061d234e03004f34058028707ecddfc730fae Mon Sep 17 00:00:00 2001
From: Brandon Cazander
Date: Wed, 28 Jan 2015 17:08:34 -0800
Subject: Provide rest_framework.resolve. Fixes #2489

---
 rest_framework/relations.py  |  7 ++++---
 rest_framework/reverse.py    | 15 ++++++++++++++-
 rest_framework/versioning.py | 16 ++++++++++++++++
 3 files changed, 34 insertions(+), 4 deletions(-)

(limited to 'rest_framework')

diff --git a/rest_framework/relations.py b/rest_framework/relations.py
index 66857a41..809d3db9 100644
--- a/rest_framework/relations.py
+++ b/rest_framework/relations.py
@@ -1,7 +1,7 @@
 # coding: utf-8
 from __future__ import unicode_literals
 from django.core.exceptions import ObjectDoesNotExist, ImproperlyConfigured
-from django.core.urlresolvers import resolve, get_script_prefix, NoReverseMatch, Resolver404
+from django.core.urlresolvers import get_script_prefix, NoReverseMatch, Resolver404
 from django.db.models.query import QuerySet
 from django.utils import six
 from django.utils.encoding import smart_text
@@ -9,7 +9,7 @@ from django.utils.six.moves.urllib import parse as urlparse
 from django.utils.translation import ugettext_lazy as _
 from rest_framework.compat import OrderedDict
 from rest_framework.fields import get_attribute, empty, Field
-from rest_framework.reverse import reverse
+from rest_framework.reverse import reverse, resolve
 from rest_framework.utils import html
 
 
@@ -205,6 +205,7 @@ class HyperlinkedRelatedField(RelatedField):
         return self.reverse(view_name, kwargs=kwargs, request=request, format=format)
 
     def to_internal_value(self, data):
+        request = self.context.get('request', None)
         try:
             http_prefix = data.startswith(('http:', 'https:'))
         except AttributeError:
@@ -218,7 +219,7 @@ class HyperlinkedRelatedField(RelatedField):
                 data = '/' + data[len(prefix):]
 
         try:
-            match = self.resolve(data)
+            match = self.resolve(data, request=request)
         except Resolver404:
             self.fail('no_match')
 
diff --git a/rest_framework/reverse.py b/rest_framework/reverse.py
index 8fcca55b..0d1d94a7 100644
--- a/rest_framework/reverse.py
+++ b/rest_framework/reverse.py
@@ -1,12 +1,25 @@
 """
-Provide reverse functions that return fully qualified URLs
+Provide urlresolver functions that return fully qualified URLs or view names
 """
 from __future__ import unicode_literals
 from django.core.urlresolvers import reverse as django_reverse
+from django.core.urlresolvers import resolve as django_resolve
 from django.utils import six
 from django.utils.functional import lazy
 
 
+def resolve(path, urlconf=None, request=None):
+    """
+    If versioning is being used then we pass any `resolve` calls through
+    to the versioning scheme instance, so that the resulting view name
+    can be modified if needed.
+    """
+    scheme = getattr(request, 'versioning_scheme', None)
+    if scheme is not None:
+        return scheme.resolve(path, urlconf, request)
+    return django_resolve(path, urlconf)
+
+
 def reverse(viewname, args=None, kwargs=None, request=None, format=None, **extra):
     """
     If versioning is being used then we pass any `reverse` calls through
diff --git a/rest_framework/versioning.py b/rest_framework/versioning.py
index a07b629f..a76da17a 100644
--- a/rest_framework/versioning.py
+++ b/rest_framework/versioning.py
@@ -1,6 +1,8 @@
 # coding: utf-8
 from __future__ import unicode_literals
 from django.utils.translation import ugettext_lazy as _
+from django.core.urlresolvers import resolve as django_resolve
+from django.core.urlresolvers import ResolverMatch
 from rest_framework import exceptions
 from rest_framework.compat import unicode_http_header
 from rest_framework.reverse import _reverse
@@ -24,6 +26,9 @@ class BaseVersioning(object):
     def reverse(self, viewname, args=None, kwargs=None, request=None, format=None, **extra):
         return _reverse(viewname, args, kwargs, request, format, **extra)
 
+    def resolve(self, path, urlconf=None):
+        return django_resolve(path, urlconf)
+
     def is_allowed_version(self, version):
         if not self.allowed_versions:
             return True
@@ -127,6 +132,17 @@ class NamespaceVersioning(BaseVersioning):
             viewname, args, kwargs, request, format, **extra
         )
 
+    def resolve(self, path, urlconf=None, request=None):
+        match = django_resolve(path, urlconf)
+        if match.namespace:
+            _, view_name = match.view_name.split(':')
+            return ResolverMatch(func=match.func,
+                                 args=match.args,
+                                 kwargs=match.kwargs,
+                                 url_name=view_name,
+                                 app_name=match.app_name)
+        return match
+
 
 class HostNameVersioning(BaseVersioning):
     """
-- 
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