问题描述
我如何让 Django 在它遇到例如渲染模板时出现未定义的变量错误时告诉我?
How can I ask Django to tell me when it encounters, for example, an undefined variable error while it's rendering templates?
我已经尝试过明显的 DEBUG = True 和 TEMPLATE_DEBUG = True，但它们没有帮助.
I've tried the obvious DEBUG = True and TEMPLATE_DEBUG = True, but they don't help.
推荐答案
根据 django 文档，默认情况下，未定义的变量被视为 ''(空字符串).而在 if for regroup 中，它是 None.如果您要确定未定义的变量，请在设置中更改 TEMPLATE_STRING_IF_INVALID.'%s' 将无效的变量渲染为它的变量名，这样你就很容易识别了.how-invalid-variables-are-handled
According to the django documentation,undefined variables are treated as ''(empty string) by default. While in if for regroup, it's None.If you are going to identify the variable undefined, change TEMPLATE_STRING_IF_INVALID in settings.'%s' makes the invalid variable to be rendered as its variable name, in this way, u can identify easily.how-invalid-variables-are-handled
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