Django - 如何使变量可用于所有模板? [英] Django - How to make a variable available to all templates?

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问题描述

我想知道如何将变量传递给所有的模板,而不必在我的views.py文件中的每个方法上重复相同的代码。



在下面的示例中,我想使类别(类别对象数组)可用于网络应用程序中的所有模板。

 例如:我想避免写类别:每个方法的类别。可能吗? 

一种查看方法


$ b $

category = Category.objects.all()
如果is_logged_in(请求)为False:
返回render_to_response ('users / signup.html',{'is_logged_in':is_logged_in(request),'categories':categories},context_instance = RequestContext(request))
else:
return render_to_response('users / front_page .html',{'is_logged_in':is_logged_in(request),'categories':categories},context_instance = RequestContext(request))

另一种查看方法

  def another_view_method(request):
类别= Category.objects.all()
返回render_to_response('eg / front_page.html',{'is_logged_in':is_logged_in(request),'categories':categories},context_instance = RequestContext(request))


解决方案

你想要的是一个 TEMPLATE_CONTEXT_PROCESSORS ,它很容易创建一个例如假设你有一个名为 custom_app 你必须按照下面的步骤创建一个。




  • 添加 custom_app to INSTALLED_APPS in settings.py

  • 创建一个 context_processors.py custom_app 文件夹。

  • 添加下一个代码



      def categories_processor(request):
    categories = Category.objects.all()
    return {'categories' :类别}


  • 添加 context_processors.py to TEMPLATE_CONTEXT_PROCESSORS in settings.py

      TEMPLATE_CONTEXT_PROCESSORS + =(custom_app.context_processors.categories_processor,)




现在,您可以在al中使用 {{categories}} l模板:D



从Django 1.8开始



添加 TEMPLATE_CONTEXT_PROCESSORS ,在设置中,您必须添加下一个代码:

  TEMPLATES [ 0] ['OPTIONS'] ['context_processors']。append(custom_app.context_processors.categories_processor)


I would like to know how to pass a variable to all my templates, without repeating the same code on every method in my views.py file?

In the example below I would like to make categories (an array of category objects) available to all templates in the web app.

Eg: I would like to avoid writing 'categories':categories on every method. Is it possible?

One view method

def front_page(request):
    categories = Category.objects.all()
    if is_logged_in(request) is False:
        return render_to_response('users/signup.html', {'is_logged_in': is_logged_in(request), 'categories':categories}, context_instance=RequestContext(request))
    else:
        return render_to_response('users/front_page.html', {'is_logged_in': is_logged_in(request), 'categories':categories},context_instance=RequestContext(request))

Another view method

def another_view_method(request):
    categories = Category.objects.all()
    return render_to_response('eg/front_page.html', {'is_logged_in': is_logged_in(request), 'categories':categories},context_instance=RequestContext(request))

解决方案

What you want It's a TEMPLATE_CONTEXT_PROCESSORS and it's very easy to create one for example assuming you have got an app named custom_app you have to follow the next steps to create one.

  • Add custom_app to INSTALLED_APPS in settings.py
  • Create a context_processors.py into custom_app folder.
  • Add the next code

    def categories_processor(request):
     categories = Category.objects.all()            
     return {'categories': categories}
    

  • Add context_processors.py to TEMPLATE_CONTEXT_PROCESSORS in settings.py

    TEMPLATE_CONTEXT_PROCESSORS += ("custom_app.context_processors.categories_processor", )
    

And now you can use {{categories}} in all the templates :D

As of Django 1.8

To add a TEMPLATE_CONTEXT_PROCESSORS, in the settings you must add the next code:

TEMPLATES[0]['OPTIONS']['context_processors'].append("custom_app.context_processors.categories_processor")

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