@directus/api/dist/database/run-ast/lib/apply-query/get-operation.js

Directus is a real-time API and App dashboard for managing SQL database content

import { isObject } from '@directus/utils';
/**
 * Returns null or the operation information form a FieldFilter
 */
export function getOperation(key, value) {
    if (key === '_and' || key === '_or')
        return null;
    if (key.startsWith('_') && key !== '_none' && key !== '_some') {
        return { operator: key, value };
    }
    else if (!isObject(value)) {
        return { operator: '_eq', value };
    }
    const childKey = Object.keys(value)[0];
    if (childKey) {
        return getOperation(childKey, Object.values(value)[0]);
    }
    return null;
}