Method update_one

mongoengine/queryset/base.py:637–669

Perform an atomic update on the fields of the first document matched by the query. :param upsert: insert if document doesn't exist (default ``False``) :param write_concern: Extra keyword arguments are passed down which will be used as options for the resultant

(
        self,
        upsert=False,
        write_concern=None,
        full_result=False,
        array_filters=None,
        **update,
    )

        return document

    def update_one(
        self,
        upsert=False,
        write_concern=None,
        full_result=False,
        array_filters=None,
        **update,
    ):
        """Perform an atomic update on the fields of the first document
        matched by the query.

        :param upsert: insert if document doesn't exist (default ``False``)
        :param write_concern: Extra keyword arguments are passed down which
            will be used as options for the resultant
            ``getLastError`` command.  For example,
            ``save(..., write_concern={w: 2, fsync: True}, ...)`` will
            wait until at least two servers have recorded the write and
            will force an fsync on the primary server.
        :param full_result: Return the associated ``pymongo.UpdateResult`` rather than just the number
            updated items
        :param array_filters: A list of filters specifying which array elements an update should apply.
        :param update: Django-style update keyword arguments
            full_result
        :returns the number of updated documents (unless ``full_result`` is True)
        """
        return self.update(
            upsert=upsert,
            multi=False,
            write_concern=write_concern,
            full_result=full_result,
            array_filters=array_filters,
            **update,
        )

    def modify(
        self,