所以我有以下代码:
var Mix = require('../models/mix');
module.exports = {
mixTitle: function(mix_id) {
return Mix.findOne({ 'mix_id' : mix_id }, 'title', function(err, mix){
console.log(mix.title); // This correctly prints the title field
return mix.title;
});
}
}
我导入了Mix模型,然后可以访问回调中的title
字段,但有没有办法真正返回mix.title
字符串值?目前我所得到的只是(我认为)查询原型..
Query {
_mongooseOptions: {},
mongooseCollection:
NativeCollection {
collection: { s: [Object] },
opts: { bufferCommands: true, capped: false },
name: 'mixes',
collectionName: 'mixes',
conn:
NativeConnection {
base: [Object],
collections: [Object],
models: [Object],
config: [Object],
replica: false,
...等
如何正确编写此导出函数以返回找到的Object的标题字段?
答案 0 :(得分:1)
ArrayList<String> myArray = new ArrayList<>();
StringTokenizer stok = new StringTokenizer(s, "><");
while (stok.hasMoreTokens()) {
String token = stok.nextToken(); // get and save in variable so it can be used more than once
System.out.println(token); // print already extracted value
// more code here if needed
myArray.add(token); // use already extracted value
}
System.out.println(myArray); // prints list
是异步函数,你可以立即得到函数的结果。您可以传递Mix.findOne
参数并获得结果,或者更好的解决方案 - 使用promises:
callback