65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
"""
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Serializers for Bookmarks.
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"""
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from rest_framework import serializers
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from openedx.core.lib.api.serializers import CourseKeyField, UsageKeyField
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from . import DEFAULT_FIELDS
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from .models import Bookmark
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class BookmarkSerializer(serializers.ModelSerializer):
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"""
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Serializer for the Bookmark model.
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"""
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id = serializers.SerializerMethodField() # pylint: disable=invalid-name
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course_id = CourseKeyField(source='course_key')
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usage_id = UsageKeyField(source='usage_key')
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block_type = serializers.ReadOnlyField(source='usage_key.block_type')
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display_name = serializers.ReadOnlyField()
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path = serializers.SerializerMethodField()
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def __init__(self, *args, **kwargs):
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# Don't pass the 'fields' arg up to the superclass
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try:
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fields = kwargs['context'].pop('fields', DEFAULT_FIELDS) or DEFAULT_FIELDS
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except KeyError:
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fields = DEFAULT_FIELDS
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# Instantiate the superclass normally
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super(BookmarkSerializer, self).__init__(*args, **kwargs)
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# Drop any fields that are not specified in the `fields` argument.
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required_fields = set(fields)
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all_fields = set(self.fields.keys())
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for field_name in all_fields - required_fields:
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self.fields.pop(field_name)
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class Meta(object):
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""" Serializer metadata. """
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model = Bookmark
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fields = (
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'id',
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'course_id',
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'usage_id',
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'block_type',
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'display_name',
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'path',
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'created',
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)
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def get_id(self, bookmark):
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"""
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Return the REST resource id: {username,usage_id}.
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"""
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return u"{0},{1}".format(bookmark.user.username, bookmark.usage_key)
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def get_path(self, bookmark):
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"""
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Serialize and return the path data of the bookmark.
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"""
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path_items = [path_item._asdict() for path_item in bookmark.path]
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for path_item in path_items:
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path_item['usage_key'] = unicode(path_item['usage_key'])
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return path_items
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