How to decode json from unicode to js?

Question

JavaScript

There is a json file on the server, I return data from it when requested, having previously passed it through the json_encode () function in PHP.
Further, from another server I make an ajax request to this URL and get the encoded json.
To use it, I have to run it twice through JSON.parse() . In this regard, there are several questions. 1. In what form is it better to give json when implementing your API? (Encode or not?) 2. If you encode, is it possible to do without using JSON.parse() twice ? json example:
JSON.parse(JSON.parse(xhr.responseText))

"{\r\n\t\"country\": [\r\n\t\t\"\u0410\u0431\u0445\u0430\u0437\u0438\u044f\",\r\n\t\t\"\u0410\u0432\u0441\u0442\u0440\u0430\u043b\u0438\u044f\",
....

Thanks in advance for the replies.

Answer 1

json file by passing it through the json_encode() function

Encode twice => decode twice. Obviously. What's wrong?

Answer 2

If you want the Cyrillic alphabet to be immediately given in the correct form in the answer:

function response($data = [] {
    header("Content-Type: application/json; charset=utf-8");

    $flags = JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_PRETTY_PRINT;

    $fails = implode('|', array_filter([
        '\\\\',
        $flags & JSON_HEX_TAG ? 'u003[CE]' : '',
        $flags & JSON_HEX_AMP ? 'u0026' : '',
        $flags & JSON_HEX_APOS ? 'u0027' : '',
        $flags & JSON_HEX_QUOT ? 'u0022' : '',
    ]));

    $pattern = "/\\\\(?:(?:$fails)(*SKIP)(*FAIL)|u([0-9a-fA-F]{4}))/";

    $callback = function ($m) {
        return html_entity_decode("&#x$m[1];", ENT_QUOTES, 'UTF-8');
    };
    
    echo preg_replace_callback($pattern, $callback, json_encode($data, $flags));
    exit;
}

In general, everything will be correctly decoded on the client side and you don’t have to worry about recoding.

Answer 3

попробуйте вместо PreparateSerializer использовать

from rest_framework.serializers import RelatedField
...
meds = RelatedField(source='med', read_only=True)
...