Jinja2异常处理 [英] Jinja2 Exception Handling

问题描述

在Jinja2的模板中是否有处理异常的方法?

Is there a way to handle exceptions within a template in jinja2?

{% for item in items %}
   {{ item|urlencode }}  <-- item contains a unicode string that contains a character causes urlencode to throw KeyError
{% endfor %}

如何处理该异常，以便我可以跳过该项目或处理该异常而不会强制整个模板渲染失败?

How do I handle that exception so that I can just skip that item or handle it without forcing the entire template rendering to fail?

谢谢！

推荐答案

{% for item in items %}
   {{ item | custom_urlencode_filter }}
{% endfor %}

然后在设置jinja2环境的任何文件中

Then in whatever file you have setting up your jinja2 environment

def custom_urlencode_filter(value):
    try:
        return urlencode(value)
    except:
        # handle the exception


environment.filters['custom_urlencode_filter'] = custom_urlencode_filter

有关自定义jinja2过滤器

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