python - 使用 Flask 将变量传递给所有 Jinja2 模板

Question

我的 web 应用程序的导航系统中有一个表格，每次呈现页面时都会填充最新信息。我怎样才能避免在每个 view 中放置以下代码？

def myview():
    mydict = code_to_generate_dict() 
    return render_template('main_page.html',mydict=mydict)

mydict 用于填充表格。该表格将显示在每个页面上

Answer 1

您可以使用 Flask's Context Processors将全局变量注入(inject)到你的神社模板中

这是一个例子:

@app.context_processor
def inject_dict_for_all_templates():
    return dict(mydict=code_to_generate_dict())

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: