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How to use add_custom_join method in autotest

Best Python code snippet using autotest_python

model_logic.py

Source:model_logic.py

...81        def combine(self, rhs, connector):82            super(ExtendedManager.CustomQuery, self).combine(rhs, connector)83            if hasattr(rhs, '_custom_joins'):84                self._custom_joins.extend(rhs._custom_joins)85        def add_custom_join(self, table, condition, join_type,86                            condition_values=(), alias=None):87            if alias is None:88                alias = table89            join_dict = dict(table=table,90                             condition=condition,91                             condition_values=condition_values,92                             join_type=join_type,93                             alias=alias)94            self._custom_joins.append(join_dict)95        @classmethod96        def convert_query(self, query_set):97            """98            Convert the query set's "query" attribute to a CustomQuery.99            """100            # Make a copy of the query set101            query_set = query_set.all()102            query_set.query = query_set.query.clone(103                klass=ExtendedManager.CustomQuery,104                _custom_joins=[])105            return query_set106    class _WhereClause(object):107        """Object allowing us to inject arbitrary SQL into Django queries.108        By using this instead of extra(where=...), we can still freely combine109        queries with & and |.110        """111        def __init__(self, clause, values=()):112            self._clause = clause113            self._values = values114        def as_sql(self, qn=None, connection=None):115            return self._clause, self._values116        def relabel_aliases(self, change_map):117            return118    def add_join(self, query_set, join_table, join_key, join_condition='',119                 join_condition_values=(), join_from_key=None, alias=None,120                 suffix='', exclude=False, force_left_join=False):121        """Add a join to query_set.122        Join looks like this:123                (INNER|LEFT) JOIN <join_table> AS <alias>124                    ON (<this table>.<join_from_key> = <join_table>.<join_key>125                        and <join_condition>)126        :param join_table table to join to127        :param join_key field referencing back to this model to use for the join128        :param join_condition extra condition for the ON clause of the join129        :param join_condition_values values to substitute into join_condition130        :param join_from_key column on this model to join from.131        :param alias alias to use for for join132        :param suffix suffix to add to join_table for the join alias, if no133                alias is provided134        :param exclude if true, exclude rows that match this join (will use a135        LEFT OUTER JOIN and an appropriate WHERE condition)136        :param force_left_join - if true, a LEFT OUTER JOIN will be used137        instead of an INNER JOIN regardless of other options138        """139        join_from_table = query_set.model._meta.db_table140        if join_from_key is None:141            join_from_key = self.model._meta.pk.name142        if alias is None:143            alias = join_table + suffix144        full_join_key = _quote_name(alias) + '.' + _quote_name(join_key)145        full_join_condition = '%s = %s.%s' % (full_join_key,146                                              _quote_name(join_from_table),147                                              _quote_name(join_from_key))148        if join_condition:149            full_join_condition += ' AND (' + join_condition + ')'150        if exclude or force_left_join:151            join_type = query_set.query.LOUTER152        else:153            join_type = query_set.query.INNER154        query_set = self.CustomQuery.convert_query(query_set)155        query_set.query.add_custom_join(join_table,156                                        full_join_condition,157                                        join_type,158                                        condition_values=join_condition_values,159                                        alias=alias)160        if exclude:161            query_set = query_set.extra(where=[full_join_key + ' IS NULL'])162        return query_set163    def _info_for_many_to_one_join(self, field, join_to_query, alias):164        """165        :param field: the ForeignKey field on the related model166        :param join_to_query: the query over the related model that we're167                joining to168        :param alias: alias of joined table169        """...

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