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responder 2.0.0 以降で jinja2 の filter を追加する

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TL;DR

Responder が Ver 2.0.0 になって api から jinja_env が消えて custom filter が使えず困ったので、取り敢えず動作するように解消する話

cutom filter と html

custom_filters.py
def css_filter(path):
    return f"./static/css/{path}"
_layout.html
...
<link rel="stylesheet" href="{{ 'style.css' | css }}">
...

1.3.2 まで

1.3.2までは以下の書き方でfilterの追加が行えていた

app.py
import responder
import custom_filters

api = responder.API()


api.jinja_env.filters.update(
    css=custom_filters.css_filter
)

2.0.0 以降

2.0.0 以降は jinja_env がいないので、取り敢えず以下のように編集した

app.py
import responder
import custom_filters

api = responder.API()


api.templates._env.filters.update(
    css=custom_filters.css_filter
)

_ 付きなので responder 的には、あまり参照することを推奨していないかもしれない...

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