An error with my request

controllers_config.js

var mongoose = require('mongoose'),
  Config = mongoose.model('Config')

  exports.create = function(req, res) {
    debugger;
    var conf = new Config(req.body);
    
    conf.save(function(err) {
      if (err) throw new Error('Error while saving option');
      console.log("Ouray !");
      res.redirect('/config');
    })
  }

form.jade

extends ../layouts/default

block content
  - var action = '/config'

  if (typeof errors !== 'undefined')
    .fade.in.alert.alert-block.alert-error
      a.close(data-dismiss="alert", href="javascript:void(0)") x
      ul
        each error in errors
          li= error.type

  .row
    .span7
      form.form-horizontal(method="post", action=action, enctype="multipart/form-data")

        .control-group
          label.control-label(for='config[title]') Title
          .controls
            input#title.input-xlarge(type='text', name="config[title]", value=config.title, placeholder='Enter the title of the site')

        .control-group
          label.control-label(for='config[facebook][clientID]') Facebook clientID
          .controls
            if(typeof(config.facebook) !== 'undefined') 
              - var clientID = config.facebook.clientID
            else
              - var clientID = ""
            input#title.input-xlarge(type='text', name="config[facebook][clientID]", value=clientID, placeholder='clientID')
        .control-group
          label.control-label(for='config[facebook][clientSecret]') Facebook clientSecret
          .controls
            if(typeof(config.facebook) !== 'undefined')
              - var clientSecret = config.facebook.clientSecret  
            else
              - var clientSecret = ""
            input#title.input-xlarge(type='text', name="config[facebook][clientSecret]", value=clientSecret, placeholder='clientSecret')
        .control-group
          label.control-label(for='config[facebook][callbackURL]') Facebook callbackURL
          .controls
            if(typeof(config.facebook) !== 'undefined')
              - var callbackURL = config.facebook.callbackURL
            else
              - var callbackURL = ""
            input#title.input-xlarge(type='text', name="config[facebook][callbackURL]", value=callbackURL, placeholder='callbackURL')
        .control-group
          label.control-label(for='config[ftp][path]') Absolute path to ftp Image uploads
          .controls
            if(typeof(config.ftp) !== 'undefined') 
              - var ftpPath = config.ftp.path  
            else
              - var ftpPath = ""
            input#title.input-xlarge(type='text', name="config[ftp][path]", value=ftpPath, placeholder='/path/to/ftp/uploads')
        .control-group
          label.control-label(for='config[ftp][www]') Absolute path to www (Apache directory)
          .controls
            if(typeof(config.ftp) !== 'undefined') 
              - var ftpWWW = config.ftp.www  
            else
              - var ftpWWW = ""
            input#title.input-xlarge(type='text', name="config[ftp][www]", value=ftpWWW, placeholder='/www/data')

        .form-actions
          button.btn.btn-primary(type='submit') Save changes

model_config.js

//The model :


var mongoose = require('mongoose')
  , Schema = mongoose.Schema

var ConfigSchema = new Schema({
    config: Schema.Types.Mixed
  , createdAt: {type : Date, default : Date.now}
})

mongoose.model('Config', ConfigSchema)

query.query

//does not work
curl -i -X POST -d 'config[title]=sas&config[facebook][clientID]=soapjs&config[facebook][clientSecret]=&config[facebook][callbackURL]=&config[pixcube][path]=booooob&config[cube][www]=' http://localhost:3000/config

//throw 
< TypeError: Cannot read property 'name' of undefined
<     at model.Document.set (/Users/gabrielstuff/Sites/app_test/node_modules/mongoose/lib/document.js:435:49)
<     at model.Document (/Users/gabrielstuff/Sites/app_test/node_modules/mongoose/lib/document.js:61:10)
<     at model.Model (/Users/gabrielstuff/Sites/app_test/node_modules/mongoose/lib/model.js:38:12)
<     at new model (/Users/gabrielstuff/Sites/app_test/node_modules/mongoose/lib/model.js:2125:11)
<     at exports.create (/Users/gabrielstuff/Sites/app_test/app/controllers/configs.js:10:18)
<     at callbacks (/Users/gabrielstuff/Sites/app_test/node_modules/express/lib/router/index.js:161:37)
<     at param (/Users/gabrielstuff/Sites/app_test/node_modules/express/lib/router/index.js:135:11)
<     at pass (/Users/gabrielstuff/Sites/app_test/node_modules/express/lib/router/index.js:142:5)
<     at Router._dispatch (/Users/gabrielstuff/Sites/app_test/node_modules/express/lib/router/index.js:170:5)
<     at Object.router (/Users/gabrielstuff/Sites/app_test/node_modules/express/lib/router/index.js:33:10)app_test

req.body.json

{ config:
   { title: 'foo',
     facebook:
      { clientID: 'bar',
        clientSecret: '',
        callbackURL: '' },
     ftp: { path: '', www: 'as' } } }

But this works :

var foo = { config:
   { title: 'foo',
     facebook:
      { clientID: 'bar',
        clientSecret: '',
        callbackURL: '' },
     ftp: { path: '', www: 'as' } } };

conf = new Config(foo);