Django模型层中GET和FILTER之间的区别 [英] Difference between GET and FILTER in Django model layer

问题描述

有什么区别，请用外行人士的例子解释他们。谢谢！

解决方案

我不知道你真的需要一个例子，这很简单：

• 如果您知道这是一个与您的查询匹配的对象，请使用get。


• 否则使用过滤器，它会提供一个对象列表。

更精确：

• MyTable.objects.get（id = x）.whatever 给你$ 任何对象的属性


• MyTable.objects.filter （somecolumn = x）不仅可用作列表，还可以再次查询，如 MyTable.objects.filter（somecolumn = x）.order_by（'日期'）。


• 原因是它实际上并不是一个列表，而是一个查询对象。您可以像MyTable.objects.filter（somecolumn = x）中的obj列表一样遍历：

What is the difference, please explain them in laymen's terms with examples. Thanks!

解决方案

I don't know if you really need an example, it's quite easy:

• if you know it's one object that matches your query, use get. It will fail if it's more than one.
• otherwise use filter, which gives you a list of objects.

To be more precise:

• MyTable.objects.get(id=x).whatever gives you the whatever property of your object
• MyTable.objects.filter(somecolumn=x) is not only usable as a list, but you can also query it again, something like MyTable.objects.filter(somecolumn=x).order_by('date').
• The reason is that it's not actually a list, but a query object. You can iterate through it like through a list: for obj in MyTable.objects.filter(somecolumn=x)

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