如何使用变量在jinja2模板中传递过滤器名称

问题描述

我已经定义了一些过滤器，并经常使用它。我需要做一些A / B测试，在某些情况下，一些过滤器应该以不同的方式工作。

最简单的方法是创建一个变量存储过滤器名称的模板。如下所示：

  
已经创建了一个名为filter_name的字符串变量。你应该创建一个过滤器，它会根据它来决定做什么。
  {％set filter_name =' some_name'％} 
 {{my_value | myfilter（filter_name）}} 
 
 $ b $ myfilter（value，filtername）：
 if（filtername is'twice'） 
返回值* 2 
其他
 ..... 
  
 
I have defined some filters and use it very often. I need to do some A/B tests and for this in some situations some of filters should work in different way.
Easiest way to do this would be create a variable in template which store a filter name. something like this:
{% set filter_name = 'some_name' %}
{{ my_value|filter_name }}
But when I try this, I get an error:
TemplateAssertionError: no filter named 'filter_name'
Please help me to find a solution.
 解决方案 
By doing {% set filter_name = 'some_name' %}, you have create a string variable named "filter_name". You should create a filter which takes one more argument on basis of which it decides what to do.
{% set filter_name = 'some_name' %}
{{ my_value|myfilter(filter_name) }}


def myfilter(value, filtername):
    if(filtername is 'twice')
        return value*2
    else
        .....
                        
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