如何从Django中的inlineadmin获取当前的模型实例 [英] How to get the current model instance from inlineadmin in Django

问题描述

我正在使用 formfield_for_manytomany .contrib.admin.ModelAdmin.formfield_for_foreignkeyrel =noreferrer> django文档。
但是在这个函数内部，我需要得到正在编辑的当前父对象。

I am using the formfield_for_manytomany given in django documentation. But inside that function I need to get the current parent object being edited.

def formfield_for_manytomany(self, db_field, request, **kwargs):
    if db_field.name == "car":
        kwargs["queryset"] = Cars.objects.filter(owner=person)
    return super(myModel, self).formfield_for_manytomany(db_field, request, **kwargs)

编辑？

推荐答案

如果人不能从 request ，您可能需要手动传递它，覆盖 ModelAdmin.get_form（）或 InlineModelAdmin.get_formset （）：

If the person cannot be easily got from request, you may need to manually pass it by overriding ModelAdmin.get_form() or InlineModelAdmin.get_formset():

from functools import partial

class MyModelAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        kwargs['formfield_callback'] = partial(self.formfield_for_dbfield, request=request, obj=obj)
        return super(MyModelAdmin, self).get_form(request, obj, **kwargs)

    def formfield_for_dbfield(self, db_field, **kwargs):
        person = kwargs.pop('obj', None)
        formfield = super(MyModelAdmin, self).formfield_for_dbfield(db_field, **kwargs)
        if db_field.name == "car" and person:
            formfield.queryset = Cars.objects.filter(owner=person)
        return formfield 

# or its inline
class MyInlineModelAdmin(admin.StackedInline):
    def get_formset(self, request, obj=None, **kwargs):
        kwargs['formfield_callback'] = partial(self.formfield_for_dbfield, request=request, obj=obj)
        return super(MyInlineModelAdmin, self).get_formset(request, obj, **kwargs)

    def formfield_for_dbfield(self, db_field, **kwargs):
        person = kwargs.pop('obj', None)
        formfield = super(MyInlineModelAdmin, self).formfield_for_dbfield(db_field, **kwargs)
        if db_field.name == "car" and person:
            formfield.queryset = Cars.objects.filter(owner=person)
        return formfield 

或

class MyModelAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        kwargs['formfield_callback'] = partial(self.formfield_for_dbfield, request=request, obj=obj)
        return super(MyModelAdmin, self).get_form(request, obj, **kwargs)

    def formfield_for_dbfield(self, db_field, **kwargs):
        if db_field.name != "car":
            kwargs.pop('obj', None)
        return super(MyModelAdmin, self).formfield_for_dbfield(db_field, **kwargs)

    def formfield_for_manytomany(self, db_field, request=None, **kwargs):
        person = kwargs.pop('obj', None)
        if db_field.name == "car" and person:
            kwargs['queryset'] = Cars.objects.filter(owner=person)
        return super(MyModelAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)

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