什么时候适合使用 Django 上下文处理器? [英] When is it appropriate to use Django context processors?

问题描述

如果我的大约一半视图需要相同的数据集，使用上下文处理器来使数据始终可用是否合适，或者是否有更好的方法来避免重复代码以在不查询的情况下跨多个视图获取数据数据是否不会在视图中使用?

If about half of my views require the same data set, is it appropriate to use a context processor to make the data always available, or is there a better way to avoid repeating the code to get that data across several views without querying the data if it won't be used in the view?

推荐答案

RequestContext 初始值设定项将运行设置文件中列出的任何上下文处理器，但它还需要运行其他处理器的列表.任何通用上下文处理器都可以放在 settings.py 中，更具体的可以根据具体情况添加到 RequestContext 中.

The RequestContext initializer will run any context processors listed in the settings file, but it also takes a list of additional processors to run. Any general purpose context processors can be put in settings.py and more specific ones can be added to the RequestContext on a case-by-case basis.

完全保留 RequestContext 以不运行任何上下文处理器.

Leave RequestContext out altogether to not run any context processors.

# want context processors listed in settings.py as well as some more specific ones
return render_to_response('template.html', {'foo':'bar'}, context_instance=RequestContext(request, processors = extra_processors))

# want only context processors listed in settings.py
return render_to_response('template.html', {'foo':'bar'}, context_instance=RequestContext(request))

# no context processors
return render_to_response('template.html', {'foo':'bar'})

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