javascript - async 和await 函数先于其他函数运行

Question

我的processawait函数不等待preProccess结束:

我有一个调用 Controller 的路由类

exports.Controller = async function (req, res) {

let callbackPreProccess = await Implementation.preProccess(payload, resolve);

let callbackProccess = await Implementation.proccess(callbackPreProccess, resolve);
res.status(200).json(callbackProccess);

//

export class Implementation{

    preProccess(payload: any, resolve: string): Promise<any> {
        return new Promise(async (resolve, reject) => {
            try {
               if (payload.test == true){
                    logger.info('preProccess OK');
               }

               //preProccess connect to the DB and get some informations,
               //enrich the payload and return
               logger.info('preProccess DB access OK');

               resolve(payload);

           }
           catch(error){
               throw new Error("Manual Error");
               reject(error);
           }
    };


    proccess(payload: any, resolve: string): Promise<any> {
        return new Promise(async (resolve, reject) => {
            try {
                logger.info('proccess OK');

                resolve(true);
            }
            catch(error){
                reject(error);
            }
    };
}

我所期望的所有等待函数是怎样的:

info&& 'preProccess OK'
info&& 'preProccess DB access OK'
info&& 'proccess OK'

但是回到我身边:

info&& 'preProccess OK'
info&& 'proccess OK'
info&& 'preProccess DB access OK'

即使我强制抛出错误，期望不运行该过程，它们也会运行

info&& 'preProccess OK'
info&& 'proccess OK'
error&& 'Manual error'

但是当我在 process Controller 上使用 .then 并手动等待 preProccess 时，它工作得很好。

Answer 1

创建新进程时使用await。

 return await new Promise(async (resolve, reject) => {