id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
30233	add get_queryset_with_parent_obj to InlineModelAdmin to support access parent_model's instance	banxi	nobody	"When subclass admin.InlineModelAdmin.
I want to limit the queryset   related to the parent_models's instance.

In my usecase, there's a Org Tree Model. and We can set managers for Org. So I used  the following ManyToManyField inline:


{{{
class OrgManagerRelationInline(admin.TabularInline):
    model = OrgManagerRelation
    extra = 1

    def get_queryset(self, request):
        qs = super(OrgManagerRelationInline, self).get_queryset(request)
        return qs
}}}

But I want to limit to the manager candicates only belong to higher org levels.
So I need to access the  parent_model's instance. and there's also a SO question 
[https://stackoverflow.com/questions/32150088/django-access-the-parent-instance-from-the-inline-model-admin]
But I dont'k want to use to unrobust hacking method.

So think we should provide a `get_queryset_with_parent_obj` or something like this.

{{{
    def get_queryset(self, request):
        queryset = super().get_queryset(request)
        if not self.has_view_or_change_permission(request):
            queryset = queryset.none()
        return queryset

    def get_queryset_with_parent_obj(self,request,parent_obj):
        return self.get_queryset(request)
}}}

and the calling code in `_create_formsets` can be changed to :


{{{
            formset_params = {
                'instance': obj,
                'prefix': prefix,
                'queryset': inline.get_queryset_with_parent_obj(request,parent_obj=obj),
            }
}}}


"	New feature	closed	contrib.admin	dev	Normal	wontfix			Unreviewed	0	0	0	0	0	0