Sequelize HasMany BelongsToMany删除旧引用

时间:2016-04-11 15:43:35

标签: javascript sql node.js postgresql sequelize.js

我遇到的问题是,在创建新实例时会删除旧引用。我将展示我的代码并举例说明,我做错了什么?

var Users = sequelize.define('Users', { id: { type: DataTypes.INTEGER, autoIncrement: true, primaryKey: true }, name: DataTypes.STRING, email: DataTypes.STRING }, { classMethods: { associate: function(models) { Users.hasMany(models.Interest,{ as: 'interests'}); } } } );

...

var Interest = sequelize.define('Interest', { category: DataTypes.STRING, value: DataTypes.STRING }, { classMethods: { associate: function(models) { Interest.belongsToMany(models.Users, {through: 'UsersInterest'}); } } });

首先我创造一个兴趣

models.Interest.create({ value: data.value, category: data.category }).then(function(newInterest) { //allgood });

` // data保存实例所需的信息

models.Users.create({
  name: data.name,
  email: data.email

}).then(function(newUser) {
    //data interest contains the interest to find and add
    for (var i = 0; i < data.interests.length; i++) {
      models.Interest.findOne({
        where: { value: data.interests[i].value, category: data.interests[i].category},
      }).then(function(interest) {
          newUser.addInterest(interest).then(function() {
          }
        });
      });
    }
  });

` 当我创建第一个好的时候,看看:

{"user":{"id":1,"name":"Chelo","email":"chelo@intelli.com","interests":[{"value":"kitesurf","category":"sport"}]}}

直到现在,一切都很好,在我添加第二个之后......

{"user":{"id":1,"name":"Chelo","email":"chelo@intelli.com","interests":[]}} {"user":{"id":2,"name":"CACA Cavazzoli",email":"chelo@intelli.com","interests":[{"value":"kitesurf","category":"sport"}]}}]}

当我创建具有相同兴趣的第二个实例时,将删除第一个实例的兴趣...

我做错了什么?

请帮助!!!

1 个答案:

答案 0 :(得分:0)

确实我做错了什么。感谢@ LT-的评论。 我会给出我改变的正确代码:

var Users = sequelize.define('Users', { id: { type: DataTypes.INTEGER, autoIncrement: true, primaryKey: true }, name: DataTypes.STRING, email: DataTypes.STRING }, { classMethods: { associate: function(models) { Users.belongsToMany(models.Interest,{ as: 'interests', through: 'UsersInterest'}); } } } );

基本上,我已在双方,用户和兴趣上添加了belongsToMany。

希望它有所帮助。