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