Added unit test for issue 810.

The problem seems to be that code called by post_internal() relies on the
Flask request object, even though the current request may not be a POST
to the given resource.

eve/methods/common.py

@@ -1080,6 +1080,8 @@ def resource_link():
     """
     path = request.path.strip('/')
 
+    assert request.routing_exception is None, 'Routing error for %s: %s' % (request.url, request.routing_exception)
+
     if '|item' in request.endpoint:
         path = path[:path.rfind('/')]
 

eve/tests/endpoints.py

@@ -218,6 +218,27 @@ def test_api_prefix(self):
         r = self.test_prefix.get('/prefix/contacts/')
         self.assert200(r.status_code)
 
+        r = self.test_prefix.post('/prefix/contacts/', data='{}',
+                                  content_type='application/json')
+        self.assert201(r.status_code)
+
+    def test_api_prefix_post_internal(self):
+        from eve.methods.post import post_internal
+
+        settings_file = os.path.join(self.this_directory, 'test_prefix.py')
+        self.app = Eve(settings=settings_file)
+        self.test_prefix = self.app.test_client()
+
+        # This works fine
+        with self.app.test_request_context(method='POST', path='/prefix/contacts'):
+            r, _, _, status_code = post_internal('contacts', {})
+        self.assert201(status_code)
+
+        # This fails
+        with self.app.test_request_context():
+            r, _, _, status_code = post_internal('contacts', {})
+        self.assert201(status_code)
+
     def test_api_prefix_version(self):
         settings_file = os.path.join(self.this_directory,
                                      'test_prefix_version.py')

eve/tests/test_prefix.py

@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
 
+RESOURCE_METHODS = ['GET', 'POST']
 URL_PREFIX = 'prefix'
 DOMAIN = {'contacts': {}}