如何将变量的集合传递给模板 [英] How to pass collection of variables to templates

问题描述

• 我已经建立了一个使用flask和SqlAlchemy的博客引擎，具有左侧和右侧的通用基础模板右侧边栏以及根据查询动态生成的
  页脚区域。


• 
  $ b
• 在每个视图中都传递了许多变量来填充所述的侧边栏和页脚。 p>我的问题是：
  
  

  
  

  是否有一种方法可以将一组变量传递给烧瓶应用程序中的每个视图，而无需在 render_template（）调用中传递它们
  

  
  

  解决方案

  最简单的方法是将一组变量提供给模板，将它们添加到 flask.g 。
  
  
  

  例如，您可以有 g.left_sidebars ， g.right_sidebars 和 g.footer ，每个数组都包含您正在使用的变量。这些变量可能有预先呈现的HTML（可能缓存，如果可能的话，以避免每次渲染），或者他们可能是包含子模板的名称。
  
  

  由于 flask.g 自动提供给模板，所有你需要做的就是在每个请求期间或者在 before_request 处理程序。

  
  

  I've been building a blog engine with flask and SqlAlchemy and I've reached a point where I have the following:

  • A generic base template which has a left & right sidebar along with footer areas that are dynamically generated based on queries.
  • A number of variables that are being passed in every view to populate said sidebars and footer.

  My question is:

  Is there a means by which I can pass a group of variables to every view in a flask app without having to pass them in the render_template() call?

  解决方案

  The easiest way to make a set of variables available to a template is to add them to flask.g.

  For example, you could have g.left_sidebars, g.right_sidebars and g.footer, each an array with the variables that you are using. These variables could have pre-rendered HTML (maybe cached if possible to avoid rendering them every time), or they could be names of sub-templates to include.

  Since flask.g is made available to the templates automatically all you need to do is populate these arrays during each request or in a before_request handler.

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