Question

如何在node.js中使用mongoose中的findOne for循环，也许还有其他逻辑可以做同样的事情？

    data = { _id: '598b4e9abe74280be0b0cb1b' }
           { _id: '598b4ec1be74280be0b0cb1c' }
           { _id: '598b4fa8be74280be0b0cb1d' }
           { _id: '5992feccdad6db0c603b260d' }
           { _id: '5995e4ce0b38ba123cf06654' };

    notification = new Array();

    for (var i = 0; i < data.length; i++) { 
               Message.findOne({ from: data[i]._id, to:socket.handshake.session.passport.user }, function(err, message){

                        if (err){

                            console.log('error');

                        }

                        if(!message.length){

                            console.log('no message!!');

                        }else{

                            notification.push(message);  

                        }          

                });
            }

Answer 1

如果您可以将输入数据转换为数组，则可以执行以下操作：

var data = [ObjectId('598b4e9abe74280be0b0cb1b'),
            ObjectId('598b4ec1be74280be0b0cb1c'),
            ObjectId('598b4fa8be74280be0b0cb1d'),
            ObjectId('5992feccdad6db0c603b260d'),
            ObjectId('5995e4ce0b38ba123cf06654')];

Message.find({from: {$in: data}, to:socket.handshake.session.passport.user})

Node.JS Mongoose findOne With for循环

1 个答案: