Include mixins in advanced component class loading and preview modules

cms/djangoapps/contentstore/views/component.py

@@ -30,6 +30,7 @@ from .requests import _xmodule_recurse
 from .access import has_access
 from xmodule.x_module import XModuleDescriptor
 from xblock.plugin import PluginMissingError
+from xblock.runtime import Mixologist
 
 __all__ = ['OPEN_ENDED_COMPONENT_TYPES',
            'ADVANCED_COMPONENT_POLICY_KEY',
@@ -137,6 +138,15 @@ def edit_subsection(request, location):
     )
 
 
+def load_mixed_class(category):
+    """
+    Load an XBlock by category name, and apply all defined mixins
+    """
+    component_class = XModuleDescriptor.load_class(category)
+    mixologist = Mixologist(settings.XBLOCK_MIXINS)
+    return mixologist.mix(component_class)
+
+
 @login_required
 def edit_unit(request, location):
     """
@@ -165,7 +175,7 @@ def edit_unit(request, location):
 
     component_templates = defaultdict(list)
     for category in COMPONENT_TYPES:
-        component_class = XModuleDescriptor.load_class(category)
+        component_class = load_mixed_class(category)
         # add the default template
         # TODO: Once mixins are defined per-application, rather than per-runtime,
         # this should use a cms mixed-in class. (cpennington)
@@ -203,7 +213,7 @@ def edit_unit(request, location):
                 # class? i.e., can an advanced have more than one entry in the
                 # menu? one for default and others for prefilled boilerplates?
                 try:
-                    component_class = XModuleDescriptor.load_class(category)
+                    component_class = load_mixed_class(category)
 
                     component_templates['advanced'].append((
                         component_class.display_name.default or category,

cms/djangoapps/contentstore/views/preview.py

@@ -2,6 +2,7 @@ import logging
 import sys
 from functools import partial
 
+from django.conf import settings
 from django.http import HttpResponse, Http404, HttpResponseBadRequest, HttpResponseForbidden
 from django.core.urlresolvers import reverse
 from django.contrib.auth.decorators import login_required
@@ -116,6 +117,7 @@ def preview_module_system(request, preview_id, descriptor):
         user=request.user,
         xblock_field_data=preview_field_data,
         can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
+        mixins=settings.XBLOCK_MIXINS,
     )
 
 

lms/djangoapps/open_ended_grading/tests.py

@@ -169,7 +169,8 @@ class TestPeerGradingService(ModuleStoreTestCase, LoginEnrollmentTestCase):
             replace_urls=None,
             xblock_field_data=lambda d: d._field_data,
             s3_interface=test_util_open_ended.S3_INTERFACE,
-            open_ended_grading_interface=test_util_open_ended.OPEN_ENDED_GRADING_INTERFACE
+            open_ended_grading_interface=test_util_open_ended.OPEN_ENDED_GRADING_INTERFACE,
+            mixins=settings.XBLOCK_MIXINS,
         )
         self.descriptor = peer_grading_module.PeerGradingDescriptor(self.system, field_data, ScopeIds(None, None, None, None))
         self.peer_module = self.descriptor.xmodule(self.system)