从direct_to_template移动到Django中的新TemplateView

时间:2012-06-12 22:22:59

标签: django generics migration views

希望将我的项目更新到最新版本的django,并发现通用视图已经发生了很大变化。查看文档,我看到他们将所有通用内容更改为基于类的视图。我理解大部分的用法,但是对于为视图返回大量对象时我需要做的事情很困惑。当前网址可能如下所示:

(r'^$', direct_to_template, { 'template': 'index.html', 'extra_context': { 'form': CodeAddForm, 'topStores': get_topStores, 'newsStories': get_dealStories, 'latestCodes': get_latestCode, 'tags':get_topTags, 'bios':get_bios}},  'index'),

如何将这样的内容转换为这些新视图?

2 个答案:

答案 0 :(得分:29)

Generic Views Migration描述了基于类的视图取代了什么。根据文档,传递extra_context的唯一方法是继承TemplateView并提供自己的get_context_data方法。这是我提出的DirectTemplateView类,与extra_context一样允许direct_to_template

from django.views.generic import TemplateView

class DirectTemplateView(TemplateView):
    extra_context = None
    def get_context_data(self, **kwargs):
        context = super(self.__class__, self).get_context_data(**kwargs)
        if self.extra_context is not None:
            for key, value in self.extra_context.items():
                if callable(value):
                    context[key] = value()
                else:
                    context[key] = value
        return context

使用此类,您将替换:

(r'^$', direct_to_template, { 'template': 'index.html', 'extra_context': { 
    'form': CodeAddForm, 
    'topStores': get_topStores, 
    'newsStories': get_dealStories, 
    'latestCodes': get_latestCode, 
    'tags':get_topTags, 
    'bios':get_bios
}},  'index'),

使用:

(r'^$', DirectTemplateView.as_view(template_name='index.html', extra_context={ 
    'form': CodeAddForm, 
    'topStores': get_topStores, 
    'newsStories': get_dealStories, 
    'latestCodes': get_latestCode, 
    'tags':get_topTags, 
    'bios':get_bios
}), 'index'),

答案 1 :(得分:4)

我使用DirectTemplateView子类遇到了Pykler答案的问题。具体来说,这个错误:

AttributeError at /pipe/data_browse/ 'DirectTemplateView' object has no attribute 'has_header' Request Method:  
  GET Request URL:  http://localhost:8000/pipe/data_browse/ Django Version: 1.5.2
  Exception Type:   AttributeError
  Exception Value:   'DirectTemplateView' object has no attribute 'has_header'
  Exception Location:   /Library/Python/2.7/site-packages/django/utils/cache.py in patch_vary_headers, line 142 
  Python Executable:    /usr/bin/python 
  Python Version:   2.7.2

对我来说有用的是转换任何这样的行:

return direct_to_template(request, 'template.html', {'foo':12, 'bar':13})

到此:

return render_to_response('template.html', {'foo':12, 'bar':13}, context_instance=RequestContext(request))