在 Django admin 中禁用选择列表，仅用于编辑 [英] Disable choice list in Django admin, only for editing

问题描述

我想在编辑对象时禁用某些字段.我已设法为文本字段执行此操作，但对于下拉列表(选择列表)而言，这是不可能的.

I want to disable some fields when I am editing an object. I have managed to do this for text fields, but it's been impossible for a dropdown list (choice list).

我正在表单的构造函数中执行此操作.

I am doing this action in the constructor of the form.

class OrderModelForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(forms.ModelForm, self).__init__(*args, **kwargs)
        instance = getattr(self, 'instance', None)
        if instance and instance.pk:
            self.fields['description'].widget.attrs['readonly'] = True
            self.fields['city_code'].widget.attrs['disabled'] = True

请注意我是如何使用不同的关键字为两者制作的，但我无法为我的 customer_id 字段制作.

Notice how I made it for both with different keywords, but I can't do it for my customer_id field.

推荐答案

将属性设置为 disabled 或 readonly 只会影响小部件的显示方式.它实际上并没有阻止某人提交更改这些字段的帖子请求.

Setting the attribute to disabled or readonly only affects the way the widgets are displayed. It doesn't actually stop somebody submitting a post request that changes those fields.

这可能是一个更好的方法来覆盖 get_readonly_fields 适用于您的模型.

It might be a better approach to override get_readonly_fields for your model.

class OrderModelAdmin(admin.Model
    def get_readonly_fields(self, request, obj=None):
        if self.obj.pk:
            return ['description', 'city_code', 'customer']
        else:
            return []

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