如何过滤 Django2 的 autocomplete_fields 中的选择?
问题描述
在 Django 2.0 中，autocomplete_fields 被添加了，很棒.
In Django 2.0, autocomplete_fields was added, which is great.
如果没有 autocomplete_fields，我可以使用 formfield_for_foreignkey.
Without autocomplete_fields, I can change the queryset of a ForeignKeyField using formfield_for_foreignkey.
但是将两者结合起来是行不通的——看起来自动完成的选项列表是动态的，并且来自不同的 url，而不是来自当前表单.
But combining the two together doesn't work - it looks like the list of options for autocomplete is dynamic and coming from a different url, instead of from the current form.
所以问题是——
如何更改自动完成小部件中的查询集?
How can I change the queryset in the autocomplete widget?
解决方案
覆盖 ModelAdmin 的 get_search_results 方法来使用你想要的查询.您可以在视图的 get_queryset 方法中看到，该视图提供用于获取查询集的自动完成字段的数据 - 此答案的来源是 https://github.com/django/django/blob/03dbdfd9bbbbd0b0172aad648c6bbe3f395/41137/djanconadmin/views/autocomplete.py#L42.
Override the ModelAdmin's get_search_results method to use the query you want. You can see in the get_queryset method for the view providing the data for autocomplete fields that it's used to get the queryset - the source as of this answer is https://github.com/django/django/blob/03dbdfd9bbbbd0b0172aad648c6bbe3f39541137/django/contrib/admin/views/autocomplete.py#L42.
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