我想在节点js中检索关联对象，如嵌套数组

Question

如何将包含节和节实例数据的课程对象作为单个json响应发送

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Answer 1

您应该查看async.js库。对于您的问题，请使用async.parallel：

  

npm install --save async

var async = require("async");
async.parallel({
course: function (callback) {
// course query here
callback(null, results_from_coursequery); // null is error - you can also assign the error variable from query.
},
section: function (callback) {
// course query here
callback(null, results_from_sectionquery); // null is error - you can also assign the error variable from query.
}
},
function(err,results) {
if(err) {res.json(err);}
else {res.send(results);} // results is now an object similar to: {course: [object], section: [object]}
});