问题描述
保存模型时，我有几个动作要执行，尤其是从管理员那里。我将几个字段都大写并检查以确保一个或另一个字段都已填充。我还创建了字段块。现在，这些功能在覆盖清除功能和保存功能之间是分开的。现在可以使用，但是我对何时使用它们感到好奇。我浏览了一下文档，但没有找到何时使用的具体方法。
I have a couple of actions to perform when saving a models, especially from the admin. I capitalize a couple of fields and check to make sure that either one field or the other is filled. I also create the field slug. RIght now these are split between overriding the clean and the save functions. It works now, but I am curious on when to use each. I looked through the docs, and I couldn't find specifically which to use when.
推荐答案
您应该使用clean进行验证相关的工作，并解析/更改/否则清除输入。在此处可能会发生资本化字段并产生子弹的情况。我还使用clean强制将 post_type 之类的字段设置为代理模型中的特定值。如果在干净的内部引发 django.core.exceptions.ValidationError（'错误文本'），则'错误文本'被添加到 form.non_field_errors 中。
You should use clean to do validation-related work, and to parse/change/otherwise clean the input. Capitalizing fields and generating a slug can happen here. I also use clean to force a field like post_type to a specific value in proxy models. If you raise django.core.exceptions.ValidationError('error text') inside clean, the 'error text' is added to the form.non_field_errors.
保存是更改模型实际保存方式的地方。例如，我使用保存创建了一批上传的图片。如果在这里引发 ValidationError 不会被捕获，我觉得这是两者之间最重要的实际区别。
Save is the place to change the way a model is actually saved. For instance, I've used save to create a crop of an uploaded picture. ValidationErrors are not caught if raised here, and I feel like that's the most important practical difference between the two.
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