loc_mapper memoize all translations

STUD-1048

cms/djangoapps/contentstore/tests/test_contentstore.py

@@ -7,7 +7,6 @@ from textwrap import dedent
 
 from django.test.utils import override_settings
 from django.conf import settings
-from django.core.urlresolvers import reverse
 from path import path
 from tempdir import mkdtemp_clean
 from fs.osfs import OSFS
@@ -427,7 +426,7 @@ class ContentStoreToyCourseTest(ModuleStoreTestCase):
 
         course = module_store.get_item(course_location)
         num_tabs = len(course.tabs)
-        last_tab = course.tabs[num_tabs - 1]
+        last_tab = course.tabs[-1]
         url_slug = last_tab['url_slug']
         delete_url = self._get_tab_locator(course, last_tab).url_reverse('xblock')
 
@@ -446,7 +445,7 @@ class ContentStoreToyCourseTest(ModuleStoreTestCase):
 
     def _get_tab_locator(self, course, tab):
         """ Returns the locator for a given tab. """
-        tab_location = 'i4x://MITx/999/static_tab/{0}'.format(tab['url_slug'])
+        tab_location = 'i4x://edX/999/static_tab/{0}'.format(tab['url_slug'])
         return loc_mapper().translate_location(
             course.location.course_id, Location(tab_location), False, True
         )

common/lib/xmodule/xmodule/modulestore/django.py

@@ -130,7 +130,7 @@ def loc_mapper():
     # pylint: disable=W0212
     if _loc_singleton is None:
         # instantiate
-        _loc_singleton = LocMapperStore(**settings.DOC_STORE_CONFIG)
+        _loc_singleton = LocMapperStore(get_cache('default'), **settings.DOC_STORE_CONFIG)
     # inject into split mongo modulestore
     if 'split' in _MODULESTORES:
         _MODULESTORES['split'].loc_mapper = _loc_singleton

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

@@ -43,7 +43,10 @@ class TestMigration(unittest.TestCase):
 
     def setUp(self):
         super(TestMigration, self).setUp()
-        self.loc_mapper = LocMapperStore(**self.db_config)
+        noop_cache = mock.Mock(spec=['get', 'set_many'])
+        noop_cache.configure_mock(**{'get.return_value': None})
+        # pylint: disable=W0142
+        self.loc_mapper = LocMapperStore(noop_cache, **self.db_config)
         self.old_mongo = MongoModuleStore(self.db_config, **self.modulestore_options)
         self.draft_mongo = DraftModuleStore(self.db_config, **self.modulestore_options)
         self.split_mongo = SplitMongoModuleStore(

mongo_indexes.md

@@ -16,6 +16,6 @@ location_map:
 =============
 
 ```
-ensureIndex({​'_id.org': 1, '_id.course': 1})
-ensureIndex({​'course_id': 1})
+ensureIndex({'_id.org': 1, '_id.course': 1})
+ensureIndex({'course_id': 1})
 ```