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How to use _query_pivot_table method in autotest

Best Python code snippet using autotest_python

model_logic.py

...225            # lookup base object in the dict -- we need to return instances from226            # the dict, not fresh instances of the same models227            base_object = base_objects_by_id[fresh_base_object._get_pk_val()]228            yield base_object, related_object229    def _query_pivot_table(self, base_objects_by_id, pivot_table,230                           pivot_from_field, pivot_to_field):231        """232        @param id_list list of IDs of self.model objects to include233        @param pivot_table the name of the pivot table234        @param pivot_from_field a field name on pivot_table referencing235        self.model236        @param pivot_to_field a field name on pivot_table referencing the237        related model.238        @returns pivot list of IDs (base_id, related_id)239        """240        query = """241        SELECT %(from_field)s, %(to_field)s242        FROM %(table)s243        WHERE %(from_field)s IN (%(id_list)s)244        """ % dict(from_field=pivot_from_field,245                   to_field=pivot_to_field,246                   table=pivot_table,247                   id_list=','.join(str(id_) for id_248                                    in base_objects_by_id.iterkeys()))249        cursor = readonly_connection.connection().cursor()250        cursor.execute(query)251        return cursor.fetchall()252    def _many_to_many_pivot(self, base_objects_by_id, related_model,253                            pivot_table, pivot_from_field, pivot_to_field):254        """255        @param pivot_table: see _query_pivot_table256        @param pivot_from_field: see _query_pivot_table257        @param pivot_to_field: see _query_pivot_table258        @returns a pivot iterator - see _get_pivot_iterator()259        """260        id_pivot = self._query_pivot_table(base_objects_by_id, pivot_table,261                                           pivot_from_field, pivot_to_field)262        all_related_ids = list(set(related_id for base_id, related_id263                                   in id_pivot))264        related_objects_by_id = related_model.objects.in_bulk(all_related_ids)265        for base_id, related_id in id_pivot:266            yield base_objects_by_id[base_id], related_objects_by_id[related_id]267    def populate_relationships(self, base_objects, related_model,268                               related_list_name):269        """270        For each instance of this model in base_objects, add a field named271        related_list_name listing all the related objects of type related_model.272        related_model must be in a many-to-one or many-to-many relationship with273        this model.274        @param base_objects - list of instances of this model...

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