52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
import re
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from urllib.parse import urlparse
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from django.core.urlresolvers import reverse
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from rest_framework import response, routers, serializers, viewsets # noqa
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from .exceptions import OpenSlidesError
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router = routers.DefaultRouter()
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class RESTModelMixin:
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"""
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Mixin for django models which are used in our rest api.
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"""
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def get_root_rest_element(self):
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"""
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Returns the root rest instance.
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Uses self as default.
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"""
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return self
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def get_root_rest_url(self):
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"""
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Returns the detail url of the root model of this object.
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"""
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# Gets the default url-name in the same way as django rest framework
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# does in relations.HyperlinkedModelSerializer
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root_instance = self.get_root_rest_element()
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rest_url = '%s-detail' % type(root_instance)._meta.object_name.lower()
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return reverse(rest_url, args=[str(root_instance.pk)])
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def get_collection_and_id_from_url(url):
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"""
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Helper function. Returns a tuple containing the collection name and the id
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extracted out of the given REST api URL.
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For example get_collection_and_id_from_url('http://localhost/api/users/user/3/')
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returns ('users/user', '3').
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Raises OpenSlidesError if the URL is invalid.
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"""
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path = urlparse(url).path
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match = re.match(r'^/rest/(?P<collection>[-\w]+/[-\w]+)/(?P<id>[-\w]+)/$', path)
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if not match:
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raise OpenSlidesError('Invalid REST api URL: %s' % url)
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return match.group('collection'), match.group('id')
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