Django-在管理界面的内联表单中添加一个额外字段

假设我在

admin.py

中有以下内容：

class ImageInline(admin.TabularInline):
    model = Image

class ObjectAdmin(admin.ModelAdmin):
    inlines = [ ImageInline, ]

---

如何向

ImageInline

中添加一个不属于

Image

model中的字段的额外字段？

与使用普通ModelAdmin的方法相同。InlineModelAdmin可以接受表单属性。因此，创建一个自定义表单，在内联中添加所需的额外字段：

class ImageInline(admin.TabularInline):
   model = Image
   form = MyCustomForm

---

8年后，被接受的答案将不起作用

例如，在

Django-2.2.3

中的以下设置中呈现

MyInlineForm

中的自定义表单字段：

class MyInlineAdmin(admin.StackedInline):
    model = MyInlineModel
    form = MyInlineForm

@admin.register(MyModelAdmin)
class MyModelAdmin(admn.ModelAdmin):
    inlines = (MyInlineAdmin,)

受此启发，这可以通过重写

ModelFormMetaclass来实现

解决方案1:

from django.forms.models import ModelFormMetaclass


class MyModelFormMetaclass(ModelFormMetaclass):
    def __new__(cls, name, bases, attrs):
        for field in ['test_1', 'test_2', 'test_3']:
            attrs[field] = forms.CharField(max_length=30)
        return super().__new__(cls, name, bases, attrs)


class MyInlinelForm(forms.ModelForm, metaclass=MyModelFormMetaclass):
    class Meta:
        model = MyInlineModel
        fields = '__all__'

class MyInlineForm(forms.ModelForm):
    class Meta:
        model = MyInlineModel
        fields = '__all__'

class MyInlineAdmin(admin.StackedInline):
    model = MyInlineModel
    form = MyInlineForm

@admin.register(MyModelAdmin)
class MyModelAdmin(admn.ModelAdmin):
    inlines = (MyInlineAdmin,)

def get_formsets_with_inlines(self, request, obj=None):
    for inline in self.get_inline_instances(request, obj):
        if isinstance(inline, MyInlineAdmn):
            for field in ['test_1', 'test_2', 'test_3']:
                inline.form.declared_fields[field] = forms.CharField(max_length=30)

        yield inline.get_formset(request, obj), inline

查看相关代码，从中继承
attrs
传递到表单的
声明的\u字段
：

for key, value in list(attrs.items()):
    if isinstance(value, Field):
        current_fields.append((key, value))
        attrs.pop(key)
attrs['declared_fields'] = OrderedDict(current_fields)

基于此观察，并遵循
我尝试使用
ModelAdmin
的方法来丰富
声明的_字段
，它也起到了作用：

解决方案2:

from django.forms.models import ModelFormMetaclass


class MyModelFormMetaclass(ModelFormMetaclass):
    def __new__(cls, name, bases, attrs):
        for field in ['test_1', 'test_2', 'test_3']:
            attrs[field] = forms.CharField(max_length=30)
        return super().__new__(cls, name, bases, attrs)


class MyInlinelForm(forms.ModelForm, metaclass=MyModelFormMetaclass):
    class Meta:
        model = MyInlineModel
        fields = '__all__'

class MyInlineForm(forms.ModelForm):
    class Meta:
        model = MyInlineModel
        fields = '__all__'

class MyInlineAdmin(admin.StackedInline):
    model = MyInlineModel
    form = MyInlineForm

@admin.register(MyModelAdmin)
class MyModelAdmin(admn.ModelAdmin):
    inlines = (MyInlineAdmin,)

def get_formsets_with_inlines(self, request, obj=None):
    for inline in self.get_inline_instances(request, obj):
        if isinstance(inline, MyInlineAdmn):
            for field in ['test_1', 'test_2', 'test_3']:
                inline.form.declared_fields[field] = forms.CharField(max_length=30)

        yield inline.get_formset(request, obj), inline

用于在管理面板上为应用程序模型的枚举字段（如反应）添加下拉菜单功能，用于扩展StackedLine或TablerLine类；这会奏效的。另一种情况的解决方案，类扩展ModelAdmin也在comment
中给出了
MyCustomForm
是否可以在不添加
form
属性的情况下显示初始字段？如中所示，我将只是附加到它，而不是重写字段。某种性质的
super
。好的，我用
ModelForm
和
class Meta:model=Image