`db.sync`只创建id列而不创建其他内容

Question

我使用带有Postgres和Express的node-orm2在app start上创建表。我一直在筛选GitHub问题，但一直无法找出为什么没有创建其他列。我做错了什么？

启动没有表格的应用程序时的控制台输出：

[SQL/postgres] SELECT * FROM information_schema.tables WHERE table_name = 'user'
[SQL/postgres] CREATE TABLE "user" ("id" SERIAL, PRIMARY KEY ("id"))

model_user.js（应该创建5列，但只创建1列）

var bcrypt = require('bcrypt-nodejs');

module.exports = function(db, cb) {
  return {
    id:          { type: 'serial', key: true},  // <------- only column that gets created
    name:  { type: 'text', size: 128 },
    email:       { type: 'text', size: 128 },
    createdAt  : { type: 'date', required: true, time: true },
    password:    { type: 'text', size: 128 },
  }, {
    hooks: {
      beforeValidation: function () {
        this.createdAt = new Date();
      }
    },
    methods : {
      generateHash: function(password) {
        return bcrypt.hashSync(password, bcrypt.genSaltSync(8), null);
      },
      validPassword: function(password) {
        return bcrypt.compareSync(password, this.local.password);
      }
    } // end methods
  };
} // end exports

config_db.js

var orm = require('orm');
var model_user = require('../models/model_user');

module.exports = function(app) {
  var opts = {
    database : "somedb",
    protocol : "postgres",
    host     : "127.0.0.1",
    port     : 5432, 
    user     : "someguy",
    password : "",
    query    : {
      pool     : true,  
      debug    : true,  
      strdates : false
    }
  };

  app.use(orm.express(opts, {
    define: function (db, models, next) {
      models.user = db.define("user", model_user);
      db.sync();
      next();
    }
  }));
}