Added get_courses_for_wiki(self, wiki_slug) to mongo, xml and mixed modulestores.

This method returns a list of courses which use the particular wiki_slug. It is used for
checking permissions in the course_wiki app.

LMS-2136

common/lib/xmodule/xmodule/modulestore/mixed.py

@@ -417,6 +417,17 @@ class MixedModuleStore(ModuleStoreWriteBase):
         for course in store.get_courses():
             loc_mapper().translate_location(course.location.course_id, course.location)
 
+    def get_courses_for_wiki(self, wiki_slug):
+        """
+        Return the list of courses which use this wiki_slug
+        :param wiki_slug: the course wiki root slug
+        :return: list of course locations
+        """
+        courses = []
+        for modulestore in self.modulestores.values():
+            courses.extend(modulestore.get_courses_for_wiki(wiki_slug))
+        return courses
+
 
 def _compare_stores(left, right):
     """

common/lib/xmodule/xmodule/modulestore/mongo/base.py

@@ -880,8 +880,8 @@ class MongoModuleStore(ModuleStoreWriteBase):
 
     def get_courses_for_wiki(self, wiki_slug):
         """
-        Return the list of courses which use this wiki
-        :param wiki_slug: the wiki id
+        Return the list of courses which use this wiki_slug
+        :param wiki_slug: the course wiki root slug
         :return: list of course locations
         """
         courses = self.collection.find({'definition.data.wiki_slug': wiki_slug})

common/lib/xmodule/xmodule/modulestore/split_mongo/split.py

@@ -1645,3 +1645,14 @@ class SplitMongoModuleStore(ModuleStoreWriteBase):
         be a json dict key.
         """
         structure['blocks'][LocMapperStore.encode_key_for_mongo(block_id)] = content
+
+    def get_courses_for_wiki(self, wiki_slug):
+        """
+        Return the list of courses which use this wiki_slug
+        :param wiki_slug: the course wiki root slug
+        :return: list of course locations
+
+        Todo: Needs to be implemented.
+        """
+        courses = []
+        return courses
\ No newline at end of file

common/lib/xmodule/xmodule/modulestore/tests/test_mixed_modulestore.py

@@ -368,6 +368,24 @@ class TestMixedModuleStore(LocMapperSetupSansDjango):
         orphans = self.store.get_orphans(self.course_locations[self.MONGO_COURSEID], None)
         self.assertEqual(len(orphans), 0, "unexpected orphans: {}".format(orphans))
 
+    @ddt.data('direct')
+    def test_get_courses_for_wiki(self, default_ms):
+        """
+        Test the get_courses_for_wiki method
+        """
+        self.initdb(default_ms)
+        course_locations = self.store.get_courses_for_wiki('toy')
+        self.assertEqual(len(course_locations), 1)
+        self.assertIn(Location('i4x', 'edX', 'toy', 'course', '2012_Fall'), course_locations)
+
+        course_locations = self.store.get_courses_for_wiki('simple')
+        self.assertEqual(len(course_locations), 1)
+        self.assertIn(Location('i4x', 'edX', 'simple', 'course', '2012_Fall'), course_locations)
+
+        self.assertEqual(len(self.store.get_courses_for_wiki('edX.simple.2012_Fall')), 0)
+        self.assertEqual(len(self.store.get_courses_for_wiki('no_such_wiki')), 0)
+
+
 #=============================================================================================================
 # General utils for not using django settings
 #=============================================================================================================

common/lib/xmodule/xmodule/modulestore/tests/test_mongo.py

@@ -278,20 +278,38 @@ class TestMongoModuleStore(object):
         """
         Test the get_courses_for_wiki method
         """
-        for course_id in self.courses:
-            courses = self.store.get_courses_for_wiki(course_id)
-            assert_equals(len(courses), 1)
-            assert_equals(Location('i4x', 'edX', course_id, 'course', '2012_Fall'), courses[0])
-        course_locs = self.store.get_courses_for_wiki('no_such_wiki')
-        assert_equals(len(course_locs), 0)
-        # now set two to have same wiki
-        course = self.store.get_course('edX/toy/2012_Fall')
-        course.wiki_slug = 'simple'
-        self.store.save_xmodule(course)
-        courses = self.store.get_courses_for_wiki('simple')
-        assert_equals(len(courses), 2)
-        for course_id in ['toy', 'simple']:
-            assert_in(Location('i4x', 'edX', course_id, 'course', '2012_Fall'), courses)
+        for course_number in self.courses:
+            course_locations = self.store.get_courses_for_wiki(course_number)
+            assert_equals(len(course_locations), 1)
+            assert_equals(Location('i4x', 'edX', course_number, 'course', '2012_Fall'), course_locations[0])
+
+        course_locations = self.store.get_courses_for_wiki('no_such_wiki')
+        assert_equals(len(course_locations), 0)
+
+        # set toy course to share the wiki with simple course
+        toy_course = self.store.get_course('edX/toy/2012_Fall')
+        toy_course.wiki_slug = 'simple'
+        self.store.update_item(toy_course)
+
+        # now toy_course should not be retrievable with old wiki_slug
+        course_locations = self.store.get_courses_for_wiki('toy')
+        assert_equals(len(course_locations), 0)
+
+        # but there should be two courses with wiki_slug 'simple'
+        course_locations = self.store.get_courses_for_wiki('simple')
+        assert_equals(len(course_locations), 2)
+        for course_number in ['toy', 'simple']:
+            assert_in(Location('i4x', 'edX', course_number, 'course', '2012_Fall'), course_locations)
+
+        # configure simple course to use unique wiki_slug.
+        simple_course = self.store.get_course('edX/simple/2012_Fall')
+        simple_course.wiki_slug = 'edX.simple.2012_Fall'
+        self.store.update_item(simple_course)
+        # it should be retrievable with its new wiki_slug
+        course_locations = self.store.get_courses_for_wiki('edX.simple.2012_Fall')
+        assert_equals(len(course_locations), 1)
+        assert_in(Location('i4x', 'edX', 'simple', 'course', '2012_Fall'), course_locations)
+
 
 class TestMongoKeyValueStore(object):
     """

common/lib/xmodule/xmodule/modulestore/tests/test_xml.py

@@ -7,8 +7,6 @@ import unittest
 from glob import glob
 from mock import patch
 
-from nose.tools import assert_raises, assert_equals  # pylint: disable=E0611
-
 from xmodule.course_module import CourseDescriptor
 from xmodule.modulestore.xml import XMLModuleStore
 from xmodule.modulestore import Location, XML_MODULESTORE_TYPE
@@ -43,7 +41,7 @@ class TestXMLModuleStore(unittest.TestCase):
 
     def test_xml_modulestore_type(self):
         store = XMLModuleStore(DATA_DIR, course_dirs=['toy', 'simple'])
-        assert_equals(store.get_modulestore_type('foo/bar/baz'), XML_MODULESTORE_TYPE)
+        self.assertEqual(store.get_modulestore_type('foo/bar/baz'), XML_MODULESTORE_TYPE)
 
     def test_unicode_chars_in_xml_content(self):
         # edX/full/6.002_Spring_2012 has non-ASCII chars, and during
@@ -52,7 +50,7 @@ class TestXMLModuleStore(unittest.TestCase):
         # Ensure that there really is a non-ASCII character in the course.
         with open(os.path.join(DATA_DIR, "toy/sequential/vertical_sequential.xml")) as xmlf:
             xml = xmlf.read()
-            with assert_raises(UnicodeDecodeError):
+            with self.assertRaises(UnicodeDecodeError):
                 xml.decode('ascii')
 
         # Load the course, but don't make error modules.  This will succeed,
@@ -78,3 +76,28 @@ class TestXMLModuleStore(unittest.TestCase):
         about_module = course_module[about_location]
         self.assertIn("GREEN", about_module.data)
         self.assertNotIn("RED", about_module.data)
+
+    def test_get_courses_for_wiki(self):
+        """
+        Test the get_courses_for_wiki method
+        """
+        store = XMLModuleStore(DATA_DIR, course_dirs=['toy', 'simple'])
+        for course in store.get_courses():
+            course_locations = store.get_courses_for_wiki(course.wiki_slug)
+            self.assertEqual(len(course_locations), 1)
+            self.assertIn(Location('i4x', 'edX', course.location.course, 'course', '2012_Fall'), course_locations)
+
+        course_locations = store.get_courses_for_wiki('no_such_wiki')
+        self.assertEqual(len(course_locations), 0)
+
+        # now set toy course to share the wiki with simple course
+        toy_course = store.get_course('edX/toy/2012_Fall')
+        toy_course.wiki_slug = 'simple'
+
+        course_locations = store.get_courses_for_wiki('toy')
+        self.assertEqual(len(course_locations), 0)
+
+        course_locations = store.get_courses_for_wiki('simple')
+        self.assertEqual(len(course_locations), 2)
+        for course_number in ['toy', 'simple']:
+            self.assertIn(Location('i4x', 'edX', course_number, 'course', '2012_Fall'), course_locations)

common/lib/xmodule/xmodule/modulestore/xml.py

@@ -790,3 +790,12 @@ class XMLModuleStore(ModuleStoreReadBase):
         "split" for new-style split MongoDB backed courses.
         """
         return XML_MODULESTORE_TYPE
+
+    def get_courses_for_wiki(self, wiki_slug):
+        """
+        Return the list of courses which use this wiki_slug
+        :param wiki_slug: the course wiki root slug
+        :return: list of course locations
+        """
+        courses = self.get_courses()
+        return [course.location for course in courses if (course.wiki_slug == wiki_slug)]