python - ModelForm 的额外字段没有标签，不会在 InlineModelAdmin 中呈现

Question

要在管理add页面中添加额外字段，可以使用以下代码:

模型.py:

class Parent(models.Model):
    pass


class Child(models.Model):
    parent = models.ForeignKey(Parent, on_delete=models.PROTECT)

表单.py:

class ChildForm(forms.ModelForm):
    extra_field = forms.CharField()

    class Meta:
        model = Child
        fields = '__all__'

admin.py:

@admin.register(models.Child)
class ChildAdmin(admin.ModelAdmin):
    form = forms.ChildForm

<小时/>

当 Child 内联到 Parent 中的 Parent 时，如何添加相同的额外字段添加页面？

<小时/>

以下 admin.py:

class ChildInline(admin.TabularInline):
    model = models.Child
    form = forms.ChildForm


@admin.register(models.Parent)
class ParentAdmin(admin.ModelAdmin):
    inlines = (ChildInline,)

结果:

Traceback (most recent call last):
  File "django/db/models/options.py", line 617, in get_field
    return self.fields_map[field_name]
KeyError: 'extra_field'

...

django.core.exceptions.FieldDoesNotExist: Child has no field named 'extra_field'

...

AttributeError: Unable to lookup 'extra_field' on Child or ChildInline

Answer 1

根据this answer添加标签将使内联按预期工作:

class ChildForm(forms.ModelForm):
    extra_field = forms.CharField(label='Extra Field')

    class Meta:
        model = Child
        fields = '__all__'

相关票证:https://code.djangoproject.com/ticket/30520#ticket