Files
edx-platform/cms/lib/xblock/field_data.py
2014-06-20 11:41:22 -04:00

33 lines
1.2 KiB
Python

"""
:class:`~xblock.field_data.FieldData` subclasses used by the CMS
"""
from xblock.field_data import SplitFieldData
from xblock.fields import Scope
class CmsFieldData(SplitFieldData):
"""
A :class:`~xblock.field_data.FieldData` that
reads all UserScope.ONE and UserScope.ALL fields from `student_data`
and all UserScope.NONE fields from `authored_data`. It allows writing to`authored_data`.
"""
def __init__(self, authored_data, student_data):
# Make sure that we don't repeatedly nest CmsFieldData instances
if isinstance(authored_data, CmsFieldData):
authored_data = authored_data._authored_data # pylint: disable=protected-access
self._authored_data = authored_data
self._student_data = student_data
super(CmsFieldData, self).__init__({
Scope.content: authored_data,
Scope.settings: authored_data,
Scope.parent: authored_data,
Scope.children: authored_data,
Scope.user_state_summary: student_data,
Scope.user_state: student_data,
Scope.user_info: student_data,
Scope.preferences: student_data,
})