Python Query.add_extra方法代碼示例

本文整理匯總了Python中django.db.models.sql.query.Query.add_extra方法的典型用法代碼示例。如果您正苦於以下問題：Python Query.add_extra方法的具體用法？Python Query.add_extra怎麽用？Python Query.add_extra使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類django.db.models.sql.query.Query的用法示例。

在下文中一共展示了Query.add_extra方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。

示例1: get_related_where

# 需要導入模塊: from django.db.models.sql.query import Query [as 別名]
# 或者: from django.db.models.sql.query.Query import add_extra [as 別名]
    def get_related_where(self, fk_name, using, type):
        qn = self.get_quote_name(using)

        related_where = ["%s = %s.%s" % (qn(self.model._meta.pk.get_attname_column()[1]), type, qn(fk_name))]
        related_query = Query(self.manager.related.model)
        for name, value in self.filter.iteritems():
            related_query.add_q(Q(**{name: value}))
        for name, value in self.exclude.iteritems():
            related_query.add_q(~Q(**{name: value}))
        related_query.add_extra(
            None,
            None,
            [
                "%s = %s.%s"
                % (
                    qn(self.model._meta.pk.get_attname_column()[1]),
                    type,
                    qn(self.manager.related.field.m2m_column_name()),
                )
            ],
            None,
            None,
            None,
        )
        related_query.add_count_column()
        related_query.clear_ordering(force_empty=True)
        related_query.default_cols = False
        related_filter_where, related_where_params = related_query.get_compiler(using=using).as_sql()
        if related_filter_where is not None:
            related_where.append("(" + related_filter_where + ") > 0")
        return related_where, related_where_params

開發者ID:ErwinJunge，項目名稱:django-denorm，代碼行數:33，代碼來源:denorms.py

示例2: get_related_decrement_value

# 需要導入模塊: from django.db.models.sql.query import Query [as 別名]
# 或者: from django.db.models.sql.query.Query import add_extra [as 別名]
    def get_related_decrement_value(self, using):
        qn = self.get_quote_name(using)

        related_query = Query(self.manager.related.model)
        related_query.add_extra(None, None,
            ["%s = %s.%s" % (qn(self.model._meta.pk.get_attname_column()[1]), 'OLD', qn(self.manager.related.field.m2m_column_name()))],
            None, None, None)
        related_query.add_fields([self.fieldname])
        related_query.clear_ordering(force_empty=True)
        related_query.default_cols = False
        related_filter_where, related_where_params = related_query.get_compiler(using=using).as_sql()
        return "%s - (%s)" % (qn(self.fieldname), related_filter_where)

開發者ID:Kronuz，項目名稱:django-denorm，代碼行數:14，代碼來源:denorms.py

注：本文中的django.db.models.sql.query.Query.add_extra方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。