我有一个使用Sequelize作为ORM表达的应用程序。我有几个模型正常，但我还需要从另一个模型中提取信息以获得过滤列表。该终端控制器的模型只是帮助建议权利
fiveFurthestInsiders(req, res) {
let targetArea = req.params.areaId;
//Set the area we wish to set a match for...
let gender = req.params.gender;
//matches must be of the same gender.
let cty = req.params.country;
//and from the same country
let lang = req.params.language;
//must also speak the same language
let distances = [];
//holds the distance calculations. (calculated for each request.)
let returnUsers = [];
//holds the suggestions to return to the F.E.
return Area.findAll()
//get all the areas and Geo Codes
.then(AreaList => {
AreaList.forEach(x => {
//foreach Area of the Area List
distances.push({
//add to the distance array
target: targetArea,
//area being matched
source: x,
//area for this index
distance: areaController.calcDist(targetArea, x),
//distance from target to x (KM).
country: areaController.determineCountry(targetArea)
//determine if country for target.
});
});
}).then(_ => {
distances.sort((x, y) => {
//sort the array Descending.
return x.distance - y.distance;
}).filter(x => x.country === cty);
//filter out other countries
}).then(x => {
if (distances.indexOf(x) < 10) {
//cut out all but the 10 furthest areas for limiting purposes
return x;
}
}).then(x => {
distances.forEach(y => {
//foreach item in the distance array.
Outsider.findAll({
//find the first two people
where: {
areaCode: y.target,
//that are in the far area
gender: gender,
// are of the same gender
language: lang,
//speak the same language
country: cty
//and are in the same country
},
limit: 2
}).then(insiders => {
returnUsers.push(insiders);
//add the people from the query to the return list.
})
})
})
returnUsers = returnUsers.splice(0, 10);
//Cut down the array again as some areas might
//have had more or less people to add.
res.status(200).send(returnUsers);
//send the array of people.
}
一切似乎都在起作用，但它永远不会给Postman带来任何回报。
我的逻辑是否有缺陷？
答案 0 :(得分：1)
您的Sequelize数据库查询是Promise，这意味着它是一个异步过程。考虑将res.send移到最后一个，然后像下面的
fiveFurthestInsiders(req, res) {
let targetArea = req.params.areaId;
//Set the area we wish to set a match for...
let gender = req.params.gender;
//matches must be of the same gender.
let cty = req.params.country;
//and from the same country
let lang = req.params.language;
//must also speak the same language
let distances = [];
//holds the distance calculations. (calculated for each request.)
let returnUsers = [];
//holds the suggestions to return to the F.E.
return Area.findAll()
//get all the areas and Geo Codes
.then(AreaList => {
AreaList.forEach(x => {
//foreach Area of the Area List
distances.push({
//add to the distance array
target: targetArea,
//area being matched
source: x,
//area for this index
distance: areaController.calcDist(targetArea, x),
//distance from target to x (KM).
country: areaController.determineCountry(targetArea)
//determine if country for target.
});
});
}).then(_ => {
distances.sort((x, y) => {
//sort the array Descending.
return x.distance - y.distance;
}).filter(x => x.country === cty);
//filter out other countries
}).then(x => {
if (distances.indexOf(x) < 10) {
//cut out all but the 10 furthest areas for limiting purposes
return x;
}
}).then(x => {
distances.forEach(y => {
//foreach item in the distance array.
Outsider.findAll({
//find the first two people
where: {
areaCode: y.target,
//that are in the far area
gender: gender,
// are of the same gender
language: lang,
//speak the same language
country: cty
//and are in the same country
},
limit: 2
}).then(insiders => {
returnUsers.push(insiders);
//add the people from the query to the return list.
returnUsers = returnUsers.splice(0, 10);
//Cut down the array again as some areas might
//have had more or less people to add.
res.status(200).send(returnUsers);
//send the array of people.
})
})
})
}