分类：on_delete

2020
12-02

Django数据模型中on_delete使用详解

on_delete属性针对外键ForeignKey一、django3.0官方文档介绍：Many-to-onerelationships多对一关系Todefineamany-to-onerelationship,usedjango.db.models.ForeignKey.YouuseitjustlikeanyotherFieldtype:byincludingitasaclassattributeofyourmodel.ForeignKeyrequiresapositionalargument:theclasstowhichthemodelisrelated.Forexample,ifaCarmodelhasaManufacturer?thatis,a... 继续阅读 >