python - 如何在 Django Admin 中使用 can_add_related

Question

我在这里阅读了有关 can_add_related 功能：https ://code.djangoproject.com/ticket/9071

我尝试以这种方式使用它：

def get_form(self, request, obj=None, **kwargs):
    self.fields['person'].can_add_related = False
    return super(OperationAdmin, self).get_form(request, obj, **kwargs)

但这会引发 TypeError，我不知道如何解决。

有人可以指出我正确的方向吗？

谢谢你。

Answer 1

这可能来晚了。但供其他观众参考，

def get_form(self, request, obj=None, **kwargs):
    form = super(ProductAdmin, self).get_form(request, obj, **kwargs)
    form.base_fields['category'].widget.can_add_related = False
    return form

Answer 2

can_add_related似乎是小部件上的一个属性，而不是字段，所以试试：

self.fields['person'].widget.can_add_related = False

Answer 3

替代方法，通过更改小部件选项 *before* 实例化表单：

class MyAdmin(django.contrib.admin.ModelAdmin):

    def formfield_for_dbfield(self, *args, **kwargs):
        formfield = super().formfield_for_dbfield(*args, **kwargs)
        if hasattr(formfield, "widget"):
            formfield.widget.can_add_related = False
            formfield.widget.can_delete_related = False
            formfield.widget.can_change_related = False
        else:
            pass  # this relation doesn't have an admin page to add/delete/change

        return formfield

Answer 4

另一种方法，如果您要定义一个内联模型并在您的管理员中使用它，将覆盖 get_formset方法：

from django.contrib import admin


class MyModelInline(admin.TabularInline):
    model = MyModel
    extra = 0
    min_num = 1
    max_num = 10
    fields = [
        'some_field'
    ]

    def get_formset(self, request, obj=None, **kwargs):
        fs = super().get_formset(request, obj, **kwargs)
        fs.form.base_fields['some_field'].widget.can_add_related = False
        fs.form.base_fields['some_field'].widget.can_change_related = False
        fs.form.base_fields['some_field'].widget.can_delete_related = False
        return fs