承诺在使用列表时所有工具均无法正常工作
我希望回调在诺言完成时返回响应。我在答应所有人之前就得到了回应。批处理列表为空,因为它在全部承诺之前返回。
getByReferenceID(object, mode, limit, lastEvaluatedKey, callback){
var results = {};
var requestList = [];
var batchList = [];
var response = {};
new Promise((resolve, reject) => {
this.getRequestList(object, limit, lastEvaluatedKey,function (err, result) {
console.log(result);
results = result;
if(err) {
reject();
} else {
resolve();
}
});
}).then(async () =>
{
requestList = requestList.concat(results.items);
const runAsyncFunctions = async () => {
var promises = [];
requestList.map(async request => {
var promise = await this.getBatchList(request.requestID.S, mode, null, null, function(err, result) {
batchList = batchList.concat(result.items);
});
promises.concat(promise);
});
await Promise.all(
promises
).then(()=>{
response = {
"requests": requestList,
"batches": batchList,
"lastEvaluatedKey": results.LastEvaluatedKey
};
callback("", response);
}).catch((error) => {
console.log(error);
});
};
await runAsyncFunctions();
}).catch((error) => {
callback(error, response);
});
}
回答如下:承诺不是承诺的数组。
行
var promise = await this.getBatchList(request.requestID.S, mode, null, null, function(err, result) {
batchList = batchList.concat(result.items);
});
稍后执行
callback("", response)
我想你想做这样的事情
var promises = [];
for (const request of requestList) {
const promise = this.getBatchList(request.requestID.S, mode, null, null, function (err, result) {
batchList = batchList.concat(result.items);
});
promises.push(promise);
}
await Promise.all(
...
承诺在使用列表时所有工具均无法正常工作
我希望回调在诺言完成时返回响应。我在答应所有人之前就得到了回应。批处理列表为空,因为它在全部承诺之前返回。
getByReferenceID(object, mode, limit, lastEvaluatedKey, callback){
var results = {};
var requestList = [];
var batchList = [];
var response = {};
new Promise((resolve, reject) => {
this.getRequestList(object, limit, lastEvaluatedKey,function (err, result) {
console.log(result);
results = result;
if(err) {
reject();
} else {
resolve();
}
});
}).then(async () =>
{
requestList = requestList.concat(results.items);
const runAsyncFunctions = async () => {
var promises = [];
requestList.map(async request => {
var promise = await this.getBatchList(request.requestID.S, mode, null, null, function(err, result) {
batchList = batchList.concat(result.items);
});
promises.concat(promise);
});
await Promise.all(
promises
).then(()=>{
response = {
"requests": requestList,
"batches": batchList,
"lastEvaluatedKey": results.LastEvaluatedKey
};
callback("", response);
}).catch((error) => {
console.log(error);
});
};
await runAsyncFunctions();
}).catch((error) => {
callback(error, response);
});
}
回答如下:承诺不是承诺的数组。
行
var promise = await this.getBatchList(request.requestID.S, mode, null, null, function(err, result) {
batchList = batchList.concat(result.items);
});
稍后执行
callback("", response)
我想你想做这样的事情
var promises = [];
for (const request of requestList) {
const promise = this.getBatchList(request.requestID.S, mode, null, null, function (err, result) {
batchList = batchList.concat(result.items);
});
promises.push(promise);
}
await Promise.all(
...