Django 未调用mixin中的获取上下文数据

我是Django的新手。我想使用mixin将一些数据返回到多个基于类的视图。看起来我在mixin中定义的

get\u context\u data

没有在view类中调用

class MyMixin(object):
    def get_context_data(self, *args, **kwargs):
        data = super(MyMixin, self).get_context_data(*args, **kwargs)
        from django.utils import timezone
        data['object'].now = timezone.now()
        return data

class PageDetail(DetailView, MyMixin):
    model = MyModel
    template_name = 'page-detail.html'

    def get_context_data(self, *args, **kwargs):
        data = super(PageDetail, self).get_context_data(*args, **kwargs)
        return data

---

按错误的顺序定义基类：

因此不调用任何

super（）

方法

您应该将

PageDetail

定义为：

class PageDetail(MyMixin, DetailView):
    # ...

类页面详细信息（MyMixin，DetailView）：
#…

因此，MRO的定义如下：

>>> PageDetail.__mro__
(<class 'PageDetail'>,
 <class 'django.views.generic.detail.DetailView'>,
 <class 'django.views.generic.detail.SingleObjectTemplateResponseMixin'>,
 <class 'django.views.generic.base.TemplateResponseMixin'>,
 <class 'django.views.generic.detail.BaseDetailView'>,
 <class 'django.views.generic.detail.SingleObjectMixin'>,
 <class 'django.views.generic.base.ContextMixin'>,
 <class 'django.views.generic.base.View'>,
 <class 'MyMixin'>,
 <class 'object'>)

>>> PageDetail.__mro__
(<class 'PageDetail'>,
 <class 'MyMixin'>,
 <class 'django.views.generic.detail.DetailView'>,
 <class 'django.views.generic.detail.SingleObjectTemplateResponseMixin'>,
 <class 'django.views.generic.base.TemplateResponseMixin'>,
 <class 'django.views.generic.detail.BaseDetailView'>,
 <class 'django.views.generic.detail.SingleObjectMixin'>,
 <class 'django.views.generic.base.ContextMixin'>,
 <class 'django.views.generic.base.View'>,
 <class 'object'>)

>>PageDetail.\uu mro__
(,
,
,
,
,
,
,
,
,
)

---

因此，

super（PageDetail，self）.get_context_data（*args，**kwargs）

将调用

MyMixin

类的

get_context_data

，然后在MRO中调用下一个方法。

您应该在

DetailView

之前定义

MyMixin

。

class PageDetail(MyMixin, DetailView):
    # ...

>>> PageDetail.__mro__
(<class 'PageDetail'>,
 <class 'MyMixin'>,
 <class 'django.views.generic.detail.DetailView'>,
 <class 'django.views.generic.detail.SingleObjectTemplateResponseMixin'>,
 <class 'django.views.generic.base.TemplateResponseMixin'>,
 <class 'django.views.generic.detail.BaseDetailView'>,
 <class 'django.views.generic.detail.SingleObjectMixin'>,
 <class 'django.views.generic.base.ContextMixin'>,
 <class 'django.views.generic.base.View'>,
 <class 'object'>)