2f7fa6fd8b
Adds a read-only mode to the discussion module which disables any controls for updating the discussion (votes, follows, replies, etc). This mode is enabled for users who are not a member of the team, and are also not moderators, admins, or community TAs.
67 lines
2.6 KiB
Python
67 lines
2.6 KiB
Python
from rest_framework import pagination, serializers
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class PaginationSerializer(pagination.PaginationSerializer):
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"""
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Custom PaginationSerializer for openedx.
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Adds the following fields:
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- num_pages: total number of pages
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- current_page: the current page being returned
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- start: the index of the first page item within the overall collection
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"""
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start_page = 1 # django Paginator.page objects have 1-based indexes
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num_pages = serializers.Field(source='paginator.num_pages')
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current_page = serializers.SerializerMethodField('get_current_page')
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start = serializers.SerializerMethodField('get_start')
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sort_order = serializers.SerializerMethodField('get_sort_order')
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def get_current_page(self, page):
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"""Get the current page"""
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return page.number
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def get_start(self, page):
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"""Get the index of the first page item within the overall collection"""
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return (self.get_current_page(page) - self.start_page) * page.paginator.per_page
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def get_sort_order(self, page): # pylint: disable=unused-argument
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"""Get the order by which this collection was sorted"""
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return self.context.get('sort_order')
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class CollapsedReferenceSerializer(serializers.HyperlinkedModelSerializer):
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"""Serializes arbitrary models in a collapsed format, with just an id and url."""
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url = serializers.HyperlinkedIdentityField(view_name='')
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def __init__(self, model_class, view_name, id_source='id', lookup_field=None, *args, **kwargs):
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"""Configures the serializer.
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Args:
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model_class (class): Model class to serialize.
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view_name (string): Name of the Django view used to lookup the
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model.
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id_source (string): Optional name of the id field on the model.
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Defaults to 'id'. Also used as the property name of the field
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in the serialized representation.
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lookup_field (string): Optional name of the model field used to
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lookup the model in the view. Defaults to the value of
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id_source.
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"""
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if not lookup_field:
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lookup_field = id_source
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self.Meta.model = model_class
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super(CollapsedReferenceSerializer, self).__init__(*args, **kwargs)
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self.fields[id_source] = serializers.CharField(read_only=True, source=id_source)
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self.fields['url'].view_name = view_name
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self.fields['url'].lookup_field = lookup_field
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class Meta(object):
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"""Defines meta information for the ModelSerializer.
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model is set dynamically in __init__.
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"""
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fields = ("url",)
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