@opra/elastic/adapter-utils/prepare-patch.js

Opra Elastic Search adapter package

export default function preparePatch(doc) {
    const script = [];
    const params = {};
    _preparePatch(doc, script, params, '');
    return {
        source: script.join('\n'),
        params,
        lang: 'painless',
    };
}
function _preparePatch(src, script, params, path) {
    let f;
    let field;
    for (const [k, v] of Object.entries(src)) {
        f = k.startsWith('*') ? k.substring(1) : k;
        field = path ? path + '.' + f : f;
        if (v == null) {
            script.push(`ctx._source.remove('${field}');`);
            continue;
        }
        if (v &&
            typeof v === 'object' &&
            !Array.isArray(v) &&
            /** If field name starts with "*", do "replace" operation except "merge" */
            !k.startsWith('*')) {
            _preparePatch(v, script, params, field);
            continue;
        }
        script.push(`ctx._source['${field}'] = params['${field}'];`);
        params[field] = v;
    }
}