Django Admin - 覆盖自定义表单字段的小部件 [英] Django Admin - Overriding the widget of a custom form field

问题描述

我有一个自定义 TagField 表单域.

I have a custom TagField form field.

class TagField(forms.CharField):
    def __init__(self, *args, **kwargs):
        super(TagField, self).__init__(*args, **kwargs)
        self.widget = forms.TextInput(attrs={'class':'tag_field'})

如上所示，它使用 TextInput 表单字段小部件.但在管理员中，我希望它使用 Textarea 小部件显示.为此，有 formfield_overrides 钩子，但它不适用于这种情况.

As seen above, it uses a TextInput form field widget. But in admin I would like it to be displayed using Textarea widget. For this, there is formfield_overrides hook but it does not work for this case.

管理员声明是:

class ProductAdmin(admin.ModelAdmin):
    ...
    formfield_overrides = {
        TagField: {'widget': admin.widgets.AdminTextareaWidget},
    }

这对表单字段小部件没有影响，并且 tags 仍然使用 TextInput 小部件呈现.

This has no effect on the form field widget and tags are still rendered with a TextInput widget.

非常感谢任何帮助.

--
奥马特

推荐答案

django 管理员在其许多字段中使用自定义小部件.覆盖字段的方法是创建一个与 ModelAdmin 对象一起使用的表单.

The django admin uses custom widgets for many of its fields. The way to override fields is to create a Form for use with the ModelAdmin object.

# forms.py

from django import forms
from django.contrib import admin

class ProductAdminForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(ProductAdminForm, self).__init__(*args, **kwargs)
        self.fields['tags'].widget = admin.widgets.AdminTextareaWidget()

然后，在您的 ModelAdmin 对象中，指定表单:

Then, in your ModelAdmin object, you specify the form:

from django.contrib import admin
from models import Product
from forms import ProductAdminForm

class ProductAdmin(admin.ModelAdmin):
    form = ProductAdminForm

admin.site.register(Product, ProductAdmin)

此时您也可以覆盖查询集:例如根据模型中的另一个字段过滤对象(因为 limit_choices_to 无法处理)

You can also override the queryset at this time: to filter objects according to another field in the model, for instance (since limit_choices_to cannot handle this)

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