views.py 文件源码

def perform_create(self, serializer):
        '''Add a new tileset

        When adding a new dataset, we need to enforce permissions as well as
        other rules like the uniqueness of uuids.

        Args:
            serializer (tilsets.serializer.TilesetSerializer): The serializer
            to use to save the request.
        '''

        if 'uid' in self.request.data:
            try:
                self.queryset.get(uuid=self.request.data['uid'])
                # this uid already exists, return an error
                raise rfe.APIException("UID already exists")
            except tm.Tileset.DoesNotExist:
                uid = self.request.data['uid']
        else:
            uid = slugid.nice().decode('utf-8')

        if 'filetype' not in self.request.data:
            raise rfe.APIException('Missing filetype')

        datafile_name = self.request.data.get('datafile').name

        if 'name' in self.request.data:
            name = self.request.data['name']
        else:
            name = op.split(datafile_name)[1]

        if self.request.user.is_anonymous:
            # can't create a private dataset as an anonymous user
            serializer.save(
                owner=gu.get_anonymous_user(),
                private=False,
                name=name,
                uuid=uid
            )
        else:
            serializer.save(owner=self.request.user, name=name, uuid=uid)