http://blog.apps.chicagotribune.com/02/26/best-practices/“rel=“nofollow noreferer”>django dev Best practices 使用的模型领域,极为谨慎。
但是,在现实生活中,你将使用<代码>。 PickledObject Field,以解决哪些具体问题?
我们有一个社会网络“后台”系统,它像“后台信息”、“植被状况”、“植被朋友”等一些通用障碍。 每个后备班与用户之间的联系是“滴扬戈”模式,它使用户、背书名和全权证书得以保存。 现在可以想象有多少宽松的系统: o、便衣口、脸谱 obscure等。 在JSON野心中,我们把所有背书的紧缩数据都放在关于这一模式的字典上,该模型储存在桶子里,我们就能够把任何东西放入它。
http://docs.python.org/library/pickle.html 总的来说,使用这一工具的理由很少;初等干事比较安全,而且更方便。
你可以肯定地替代一名PickledObject Field with JSON和一些额外的逻辑,从JSON中制造一个物体。 归根结底,在考虑使用PickledObject或JSON+logic时,您的用途案例正在把一个灰色物体编成你的数据库。 如果你能够相信斯图尔特的数据,并且知道这些数据将永远可以序列化,那么你就可以合理地利用PickledObject油田。 在我的案件中(我不使用jan,但这仍应适用),我有两种不同的物体类型,可以进入我的PickledObject油田,其定义不断变。 我并非不断更新我的“智者”教义,以制造一种来自“智者”价值观的物体,而我只是利用一个PickledObject油田,仅仅储存不同的物体,然后以完全可行的形式检索这些物体(召回其功能)。 洞穴: 如果你通过PickledObject油田储存物体,那么你会改变物体定义,然后取回物体,旧物体可能难以符合新物体的定义(取决于您的变化)。
有待解决的问题是:、和convenience界定和处理由许多部分组成的复合物。
You can turn each part type into a Model and connect them via ForeignKeys.
Or you can turn each part type into a class, dictionary, list, tuple, enum or whathaveyou to your liking and use PickledObjectField to store and retrieve the whole beast in one step.
如果你永远不会单独操纵部分,那么这种做法就有意义,只是整个复杂的目标。
在我的申请中,有
<代码>PickledObject Field比每个
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