How to use

_doc

function

in

Array

//再传给socket.io对象，使其与express关联起来

//监听connection事件
io.on('connection', function(socket){ //io全局的请求
  socket.on('sendmsg', function(data){ //socket当前连接的请求
    // console.log(data)
    const {from, to, msg} = data
    const chatid = [from, to].sort().join('_')
    Chat.create({chatid, from, to, content:msg}, function(err, doc){ //数据库存入数据
       io.emit('recvmsg', Object.assign({}, doc._doc))
    })
  })
})

io.on('connection',(socket)=>{
  socket.on('sendmsg',(data)=>{
    const {from,to,msg} = data;
    const chatid = [from,to].sort().join('_');
    Chat.create({chatid,from,to,content:msg},(err,doc)=>{
      io.emit('recvmsg',Object.assign({},doc._doc))
    })
  })
})