Loops 响应重复，但计数显示为1
使用无服务器的Dynamoose ORM。我有一个场景，根据推荐查找用户信息 答复如下Loops 响应重复，但计数显示为1,loops,serverless-framework,dynamoose,Loops,Serverless Framework,Dynamoose,使用无服务器的Dynamoose ORM。我有一个场景，根据推荐查找用户信息 答复如下 { "data": { "results": [ { "specialTip": "Hello World", "recommendation": "Huli ka!", "poi": { "uuid": "poi_555",
{
"data": {
"results": [
{
"specialTip": "Hello World",
"recommendation": "Huli ka!",
"poi": {
"uuid": "poi_555",
"name": "Bukit Panjang",
"images": [
{
"url": "facebook.com",
"libraryUuid": "2222",
"uuid": "9999"
}
]
},
"uuid": "i_8253578c-600d-4dfd-bd40-ce5b9bb89067",
"headline": "Awesome",
"dataset": "attractions",
"insiderUUID": "i_c932e85b-0aee-4462-b930-962f555b64bd",
"insiderInfo": [
{
"gender": "m",
"funFacts": [
{
"type": "knock knock!",
"answer": "Who's there?"
}
],
"profileImage": "newImage.jpg",
"shortDescription": "Samething",
"fullDescription": "Whatever Description",
"interests": [
"HELLO",
"WORLD"
],
"tribes": [
"HELLO",
"WORLD"
],
"uuid": "i_c932e85b-0aee-4462-b930-962f555b64bd",
"personalities": [
"HELLO",
"WORLD"
],
"travelledCities": [
"HELLO",
"WORLD"
]
}
]
},
{
"specialTip": "Hello World",
"recommendation": "Huli ka!",
"poi": {
"uuid": "poi_555",
"name": "Bukit Panjang",
"images": [
{
"url": "facebook.com",
"libraryUuid": "2222",
"uuid": "9999"
}
]
},
"uuid": "i_8253578c-600d-4dfd-bd40-ce5b9bb89067",
"headline": "Awesome",
"dataset": "attractions",
"insiderUUID": "i_c932e85b-0aee-4462-b930-962f555b64bd",
"insiderInfo": [
{
"gender": "m",
"funFacts": [
{
"type": "knock knock!",
"answer": "Who's there?"
}
],
"profileImage": "newImage.jpg",
"shortDescription": "Samething",
"fullDescription": "Whatever Description",
"interests": [
"HELLO",
"WORLD"
],
"tribes": [
"HELLO",
"WORLD"
],
"uuid": "i_c932e85b-0aee-4462-b930-962f555b64bd",
"personalities": [
"HELLO",
"WORLD"
],
"travelledCities": [
"HELLO",
"WORLD"
]
}
]
}
],
"count": 1
},
"statusCode": 200
}
module.exports.index = (_event, _context, callback) => {
Recommendation.scan().exec((_err, recommendations) => {
if (recommendations.count == 0) {
return;
}
let results = [];
recommendations.forEach((recommendation) => {
Insider.query({uuid: recommendation.insiderUUID}).exec((_err, insider) => {
if (insider.count == 0) {
return;
}
recommendation.insiderInfo = insider;
results.push(recommendation);
});
});
const response = {
data: {
results: results,
count: results.count
},
statusCode: 200
};
callback(null, response);
});
};
编辑：我以前的代码忽略了“内部人”查询是异步的这一事实。这段新代码将处理该问题，并与您的编辑匹配
const async = require('async'); // install async with 'npm install --save async'
[...]
module.exports.index = (_event, _context, callback) => {
Recommendation.scan().exec((_err, recommendations) => {
if (_err) {
console.log(_err);
return callback(_err);
}
if (recommendations.count == 0) {
const response = {
data: {
results: [],
count: 0
},
statusCode: 200
};
return callback(null, response);
}
let results = [];
async.each(recommendations, (recommendation, cb) => { // We need to handle each recommendation asynchronously...
Insider.query({uuid: recommendation.insiderUUID}).exec((_err, insider) => { // because this is asynchronous
if (_err) {
console.log(_err);
return callback(_err);
}
if (insider.count == 0) {
return cb(null);
}
recommendation.insiderInfo = insider;
results.push(recommendation);
return cb(null);
});
}, (err) => { // Once all items are handled, this is called
if (err) {
console.log(err);
return callback(err);
}
const response = { // We prepare our response
data: {
results: results, // Results may be in a different order than in the initial `recommendations` array
count: results.count
},
statusCode: 200
};
callback(null, response); // We call our main callback only once
});
});
};
初始（部分错误）答案，供参考。
您正在将映射结果推送到当前映射的对象中，并且在此处多次调用了
回调。这是相当多的意外行为材料。
请尝试以下操作：
let results = [];
recommendations.forEach((recommendation) => {
Insider.query({uuid: recommendation.insiderUUID}).exec((_err, insider) => {
if (insider.count == 0) {
return;
}
recommendation.insiderInfo = insider;
results.push(recommendation);
});
});
let response = {
data: {
results: results,
count: results.count
},
statusCode: 200
};
callback(null, response);
编辑：我以前的代码忽略了“内部人”查询是异步的这一事实。这段新代码将处理该问题，并与您的编辑匹配
const async = require('async'); // install async with 'npm install --save async'
[...]
module.exports.index = (_event, _context, callback) => {
Recommendation.scan().exec((_err, recommendations) => {
if (_err) {
console.log(_err);
return callback(_err);
}
if (recommendations.count == 0) {
const response = {
data: {
results: [],
count: 0
},
statusCode: 200
};
return callback(null, response);
}
let results = [];
async.each(recommendations, (recommendation, cb) => { // We need to handle each recommendation asynchronously...
Insider.query({uuid: recommendation.insiderUUID}).exec((_err, insider) => { // because this is asynchronous
if (_err) {
console.log(_err);
return callback(_err);
}
if (insider.count == 0) {
return cb(null);
}
recommendation.insiderInfo = insider;
results.push(recommendation);
return cb(null);
});
}, (err) => { // Once all items are handled, this is called
if (err) {
console.log(err);
return callback(err);
}
const response = { // We prepare our response
data: {
results: results, // Results may be in a different order than in the initial `recommendations` array
count: results.count
},
statusCode: 200
};
callback(null, response); // We call our main callback only once
});
});
};
初始（部分错误）答案，供参考。
您正在将映射结果推送到当前映射的对象中，并且在此处多次调用了回调。这是相当多的意外行为材料。
请尝试以下操作：
let results = [];
recommendations.forEach((recommendation) => {
Insider.query({uuid: recommendation.insiderUUID}).exec((_err, insider) => {
if (insider.count == 0) {
return;
}
recommendation.insiderInfo = insider;
results.push(recommendation);
});
});
let response = {
data: {
results: results,
count: results.count
},
statusCode: 200
};
callback(null, response);
感谢您指出我的错误，将其推回映射对象。虽然，在我做了更改之后，现在results=>[]
。您是否使用了我编写的代码？如果没有，给我们看新代码。我更新了答案。我错过了代码中的异步请求。现在应该可以了。我对代码做了一些修改，但是你提供的代码也可以。谢谢。谢谢你指出我的错误，把它推回到映射对象。虽然，在我做了更改之后，现在results=>[]
。您是否使用了我编写的代码？如果没有，给我们看新代码。我更新了答案。我错过了代码中的异步请求。现在应该可以了。我对代码做了一些修改，但是你提供的代码也可以。非常感谢。