AdminModel对象没有属性“obj”

Question

我有一个带有manytomany字段的model，在我的AdminModel类的管理面板中，我使用以下代码：

def get_object(self, request, object_id, to_field):
    # Hook obj for use in formfield_for_manytomany
    self.obj = super(GoalAdmin, self).get_object(request, object_id)
    return self.obj

def formfield_for_manytomany(self, db_field, request, **kwargs):
    if db_field.name == "reviewers":
        kwargs["queryset"] = Goal.objects.get(id=self.obj.id).reviewers.all()
    return super(GoalAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)

它工作得很好，直到我尝试从管理面板添加目标。然后我得到这个错误：

^{pr2}$

我怎样才能修好它？在

UPD:此处发生错误：

 kwargs["queryset"] = Goal.objects.get(id=self.obj.id).reviewers.all() 
Variable    Value
self       <goals.admin.GoalAdmin object at 0xa7d472cc>
db_field    <django.db.models.fields.related.ManyToManyField: reviewers>
request     <WSGIRequest: GET '/goals/goal/add/'>
kwargs      {}

Answer 1

您的错误可能是因为get_object在formfield_for_manytomany运行时没有被调用。在

也许有办法解决这个问题，但这确实是错误的做法。这类事情应该通过定义一个自定义表单并在admin类中使用它来完成。在

class GoalAdminForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(GoalAdminForm, self).__init__(*args, **kwargs)
        if self.instance is not None:
            self.fields["reviewers"].queryset = Goal.objects.get(id=self.instance.id).reviewers.all()

class GoalAdmin(admin.ModelAdmin):
    form = GoalAdminForm