mayfly-go/frontend/src/common/utils/object.ts

/**
 * 根据对象访问路径，获取对应的值
 *
 * @param obj 对象，如 {user: {name: 'xxx'}, orderNo: 1212211, products: [{id: 12}]}
 * @param path 访问路径，如 orderNo 或者 user.name 或者product[0].id
 * @returns 路径对应的值
 */
export function getValueByPath(obj: any, path: string) {
    const keys = path.split('.');
    let result = obj;
    for (let key of keys) {
        if (!result) {
            return undefined;
        }
        // 如果是字符串，则尝试使用json解析
        if (typeof result == 'string') {
            try {
                result = JSON.parse(result);
            } catch (e) {
                console.error(e);
                return undefined;
            }
        }
        if (typeof result !== 'object') {
            return undefined;
        }

        if (key.includes('[') && key.includes(']')) {
            // 处理包含数组索引的情况
            const arrayKey = key.substring(0, key.indexOf('['));
            const matchIndex = key.match(/\[(.*?)\]/);

            if (!matchIndex) {
                return undefined;
            }

            const index = parseInt(matchIndex[1]);

            let arrValue = result[arrayKey];
            if (typeof arrValue == 'string') {
                try {
                    arrValue = JSON.parse(arrValue);
                } catch (e) {
                    result = undefined;
                    break;
                }
            }

            result = Array.isArray(arrValue) ? arrValue[index] : undefined;
        } else {
            result = result[key];
        }
    }

    return result;
}