TNL-1907 Implement Course Team Membership API

openedx/core/lib/api/view_utils.py

@@ -70,6 +70,16 @@ class DeveloperErrorViewMixin(object):
             raise
 
 
+class ExpandableFieldViewMixin(object):
+    """A view mixin to add expansion information to the serializer context for later use by an ExpandableField."""
+
+    def get_serializer_context(self):
+        """Adds expand information from query parameters to the serializer context to support expandable fields."""
+        result = super(ExpandableFieldViewMixin, self).get_serializer_context()
+        result['expand'] = [x for x in self.request.QUERY_PARAMS.get('expand', '').split(',') if x]
+        return result
+
+
 def view_course_access(depth=0, access_action='load', check_for_milestones=False):
     """
     Method decorator for an API endpoint that verifies the user has access to the course.
@@ -142,6 +152,21 @@ def add_serializer_errors(serializer, data, field_errors):
     return field_errors
 
 
+def build_api_error(message, **kwargs):
+    """Build an error dict corresponding to edX API conventions.
+
+    Args:
+        message (string): The string to use for developer and user messages.
+            The user message will be translated, but for this to work message
+            must have already been scraped. ugettext_noop is useful for this.
+        **kwargs: format parameters for message
+    """
+    return {
+        'developer_message': message.format(**kwargs),
+        'user_message': _(message).format(**kwargs),  # pylint: disable=translation-of-non-string
+    }
+
+
 class RetrievePatchAPIView(RetrieveModelMixin, UpdateModelMixin, GenericAPIView):
     """Concrete view for retrieving and updating a model instance.