Flask 模板中的全局变量 [英] Global variables in Flask templates

问题描述

可能不是准确的标题，因为我是 Flask/python 的新手.我正在开发一个将由不同团队使用的内部工具.每个团队都有不同的部署阶段，例如 alpha、beta|test、prod，他们也有多个区域，例如 NA, EU, AP 等...

Probably not the accurate title since i am new to flask/python. I am working on an internal tool which will be used by different teams. Each team has different stages of their deployments e.g., alpha, beta|test, prod and they also have multiple regions e.g., NA, EU, AP etc ...

现在，当我使用 redirect_template 时，我将 stage 和 region 作为变量发送，然后在模板中使用.然而，为每个 redirect_template 做有点麻烦.有没有更好的方法来解决这个问题?

Right now i when i am using redirect_template i am sending stage and region as variable which are then used in templates. However, doing for every redirect_template is kind of cumbersome. Is there any better approach to this?

推荐答案

我假设您的 Flask 对象的名称是 app(即 app = Flask(__name__)).

I assume your Flaskobject's name is app (i.e., app = Flask(__name__)).

在 app 初始化后立即放置以下代码.

Place the below code right after the app is initialized.

@app.context_processor
def inject_stage_and_region():
    return dict(stage="alpha", region="NA")

在你的 Jinja 模板中，"alpha" 和 "NA" 可以被 {{ stage }} 和 { 引用{ region }}.

In your Jinja templates, "alpha"and "NA" can be referenced by {{ stage }} and {{ region }}.

烧瓶文档:http://flask.pocoo.org/docs/0.12/templating/#context-处理器

为了将新变量自动注入模板的上下文中，Flask 中存在上下文处理器.上下文处理器在呈现模板之前运行，并且能够将新值注入模板上下文.上下文处理器是一个返回字典的函数.该字典的键和值然后与模板上下文合并，用于应用程序中的所有模板

To inject new variables automatically into the context of a template, context processors exist in Flask. Context processors run before the template is rendered and have the ability to inject new values into the template context. A context processor is a function that returns a dictionary. The keys and values of this dictionary are then merged with the template context, for all templates in the app

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