Question

我遇到了Sequelize的问题。我在联接表中有2个具有附加属性的模型：

Project.belongsToMany(models.User, {
  foreignKey: 'projectId',
  as: 'users',
  through: models.ProjectUser
});

User.belongsToMany(models.Project, {
  foreignKey: 'userId',
  as: 'projects',
  through: models.ProjectUser
});

module.exports = (sequelize, DataTypes) => {
  const ProjectUser = sequelize.define('ProjectUser', {
    leader: DataTypes.BOOLEAN,
    manager: DataTypes.BOOLEAN
  }, {});
  ProjectUser.associate = function(models) {
    // associations can be defined here
  };
  return ProjectUser;
};

在我的控制器中，我使用setUsers（[]）来确保1个项目中没有重复的记录：

if (updateProject.users.length !== 0) {
  updatedProject.setUsers([]);
  updateProject.users.forEach(user => {
    updatedProject.addUser(user.userId, { through: { leader: user.leader, manager: user.manager }});
});

当我插入具有与以前相同ID的新记录时，会发生问题。例如：

[ { userId: 1, leader: 0, manager: 0 },
  { userId: 2, leader: 1, manager: 1 } ]

然后

[ { userId: 1, leader: 0, manager: 0 },
  { userId: 2, leader: 1, manager: 1 },
  { userId: 3, leader: 0, manager: 0 } ]

，结果仅是连接表中的userId 3。从终端：

Executing (default): DELETE FROM `ProjectUsers` WHERE `projectId` = 1 AND `userId` IN (1, 2)
Executing (default): UPDATE `ProjectUsers` SET `leader`=?,`manager`=?,`updatedAt`=? WHERE `projectId` = ? AND `userId` = ?
Executing (default): UPDATE `ProjectUsers` SET `leader`=?,`manager`=?,`updatedAt`=? WHERE `projectId` = ? AND `userId` = ?
Executing (default): INSERT INTO `ProjectUsers` (`leader`,`manager`,`createdAt`,`updatedAt`,`projectId`,`userId`) VALUES (false,false,'2019-07-04 17:57:29','2019-07-04 17:57:29',1,3);

那么，使用setUsers（[]）时我错了吗？

具有附加属性的多对多关联

0 个答案: