请教个 mongoose 操作数据库的回调函数问题 - V2EX
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wjh3323
V2EX    数据库

请教个 mongoose 操作数据库的回调函数问题

  •  1
     
  •   wjh3323 2018-01-07 20:54:06 +08:00 1198 次点击
    这是一个创建于 2908 天前的主题,其中的信息可能已经有所发展或是发生改变。
     var data user.save(function (err, doc) { if (err) { console.log(err) } else { console.log(doc) //成功输出操作的文档对象 data = doc //undefined } }) consoe.log(data) //undefined 

    直接把 doc 赋值给 data 为什么会出现 undefined ?

    第 1 条附言    2018-01-07 22:40:47 +08:00
    async (obj) => { let user= new User({ name: obj.name, pwd: obj.pwd, }) var data user.save(function (err, doc) { if (err) { console.log(err) } else { // console.log(doc) data = doc } }) return data } 
    5 条回复    2018-01-07 23:12:21 +08:00
    yiding
        1
    yiding  
       2018-01-07 22:02:22 +08:00 via iPhone
    wjh3323
        2
    wjh3323  
    OP
       2018-01-07 22:19:59 +08:00
    @yiding 恍然大悟,谢谢老哥
    wjh3323
        3
    wjh3323  
    OP
       2018-01-07 22:30:08 +08:00
    @yiding 问题又阻碍我了,我要怎么在他 return 之前就把 save()成功后的文档对象赋值给 data
    lianyue
        4
    lianyue  
       2018-01-07 22:58:59 +08:00   1
    你用的 mongoose 吧
    await user.save()
    return user
    好了
    wjh3323
        5
    wjh3323  
    OP
       2018-01-07 23:12:21 +08:00
    @lianyue THX ,解决了!
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