javascript - How to make tojson() filter in Jinja2 output Unicode instead of escape sequences? - Stack Overflow

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My template is used for JS

let SETTINGS = {{settings|tojson(4)}};

My settings is a dict {'name': 'Russian name Саша', 'id': 12345}. If I render it, i get:

let SETTINGS = {
    "name": "Russian name \u0421\u0430\u0448\u0430",
    "id": 12345
}

I need to get non-escaped unicode characters. The same way I can do in python using

json.dumps(data, encure_ascii=False)

But tojson() filter accepts only one parameter (indent).

My template is used for JS

let SETTINGS = {{settings|tojson(4)}};

My settings is a dict {'name': 'Russian name Саша', 'id': 12345}. If I render it, i get:

let SETTINGS = {
    "name": "Russian name \u0421\u0430\u0448\u0430",
    "id": 12345
}

I need to get non-escaped unicode characters. The same way I can do in python using

json.dumps(data, encure_ascii=False)

But tojson() filter accepts only one parameter (indent).

• javascript
• python-3.x
• unicode
• jinja2

Share Improve this question Follow asked May 1, 2020 at 14:25 Alexander CAlexander C 4,05722 gold badges2626 silver badges4242 bronze badges

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1 Answer 1

Sorted by: Reset to default 10

There is a way to supply rest parameters to tojson() filter.

Starting with Jinja 2.9 policies can be configured on the environment which influence how filters and other template constructs behave. It can be done by changing some keys of policies attribute.

For your case there is json.dumps_kwargs policy. This is what you have to do:

env = jinja2.Environment()
env.policies['json.dumps_kwargs']['ensure_ascii'] = False

This modified environment will not escape unicode symbols.

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