node.js - MongoDB not saving data

Question

I'm making an app with express and mongoose, https://github.com/findjashua/express_app

• app.coffee

  app.post '/user', user.add
  

• models/user.coffee

  createUser = (req) ->
      user = new User
          name : req.body.name
          email : req.body.email
          phone : req.body.phone
      return user
  
  # ...
  
  exports.add = (req, res) ->
      user = createUser req
      res.send dbService.save(user)
  

• services/db.coffee

  exports.save = (document)->
      document.save (err)->
          if err
              console.log err
          return document
  

When I make a post request to add a new user, it doesn't save anything and I can't think of any reason why. Any ideas?

Answer 1

document.save()是异步的，因此return在dbService.save().

• 遗嘱在评估res.send()之前已经完成。return document
• 它还返回document到调用回调的代码，它位于 内document.save，而不是返回到您的代码内user.coffee。

您需要调整dbService.save()以接受回调，以便您可以res.send()完成document：

exports.save = (document, callback) ->
    document.save (err, document) ->
        if (err)
            callback(err)
        else
            callback(null, document)

exports.add = (req, res) ->
    user = createUser req
    dbService.save user, (err, user) ->
        res.send err ? user

注意：可以简化第一个片段，具体取决于是否.save()需要做其他任何事情：

exports.save = (document, callback) ->
    document.save callback