Service sails.js使用find查询时,服务返回的对象未定义

Service sails.js使用find查询时,服务返回的对象未定义,service,find,sails.js,Service,Find,Sails.js,我创建了一个名为AppService的服务。 其函数GetUserPositionOptions应该返回一个对象: getUserPostionOptions: function (user) { // PositionOptions.findOne({id:'53f218deed17760200778cfe'}).exec(function (err, positionOptions) { var positionDirectionsOptions = [1,2,3];

我创建了一个名为AppService的服务。 其函数GetUserPositionOptions应该返回一个对象:

getUserPostionOptions: function (user) {
   // PositionOptions.findOne({id:'53f218deed17760200778cfe'}).exec(function (err, positionOptions) {
        var positionDirectionsOptions = [1,2,3];
        var positionLengthsOptions = [4,5,6];
        var object = {
            directions:positionDirectionsOptions, 
            lengths:positionLengthsOptions
        };   
        return object;
  // });
}
这是可行的,在我的控制器位置,正确填充选项:

var positionOptions = AppService.getUserPostionOptions(user);
但是,当我取消对find查询的注释时,该项被找到,但该对象返回undefined

提前感谢您的帮助

SailsJs ORM(以及几乎所有的NodeJs数据库查询方法)通过回调函数使用非阻塞机制。因此,您必须将代码更改为:

getUserPostionOptions: function (user, callback) {
  PositionOptions.findOne({id:'53f218deed17760200778cfe'}).exec(function (err, positionOptions) {
    var positionDirectionsOptions = [1,2,3];
    var positionLengthsOptions = [4,5,6];
    var object = {
        directions:positionDirectionsOptions, 
        lengths:positionLengthsOptions
    };   
    callback(null, object); // null indicates that your method has no error
  });
}
那就用它吧:

AppService.getUserPostionOptions(user, function(err, options) {
  if (!err) {
    sails.log.info("Here is your received data:");
    sails.log.info(options);
  }
});

谢谢你的帮助,只是结尾少了一个小括号。