[英]python & jinja2: execute pre-defined list of filters
嘗試做這樣的事情:
filters = ['foo', 'bar']
然后在Jinja2模板中:
<p>{{value|filter for filter in filters}}</p>
foo
和bar
是我定義的Jinja2過濾器。
這是行不通的,但似乎應該很容易完成。 有什么想法嗎?
假設您使用的是長頸瓶(否則只需調整但要定義過濾器),就可以創建一個過濾器以應用命名的過濾器。
在您的過濾器定義中(例如my_filters.py
):
def filter1(x):
return 'filtered1( {} )'.format(x)
app.jinja_env.filters['filter1'] = filter1 # Register filter
def filter2(x):
return 'filtered2( {} )'.format(x)
app.jinja_env.filters['filter2'] = filter2
# Create a filter to apply a list of filters by name...
def apply_filters_by_name(x, filter_names):
result = x
# Loop through filter names and apply them sequentially
for fname in filter_names:
# Get the filter function matching this name
filter_function = app.jinja_env.filters[fname]
# Apply the filter
result = filter_function(result) # apply filter
return result
app.jinja_env.filters['apply_filters_by_name'] = apply_filters_by_name
...因此在您的HTML模板中,例如:
{% set some_filter_names = ['filter1', 'filter2'] %}
{{ 'hello world'|apply_filters_by_name(some_filter_names) }}
在這里,我在模板中設置了some_filter_names,但是顯然您也可以將其作為變量傳遞。
結果是:
filtered2( filtered1( hello world ) )
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