Mysql Sequelize associate为一个模型创建userId和user_id，但不为另一个模型创建userId和user_id

“代理”和“代理”两种模式。每个都与我的“用户”模型相关联。我已经为每个模型指定了一个'user_id'的'foreignKey'。但是，Sequelize为一个模型而不是另一个模型在“user\u id”之外创建了一个“userId”，其中只创建了“user\u id”

编辑：

我的用户模型具有以下关联：

  User.associate = (models) => {
    User.hasMany(models.agency)
  }

  User.associate = (models) => {
    User.hasMany(models.agent)
  }

如何将其修复为没有“userId”

目前，以下表格是在MySQL中创建的

AGENCY

+-----------+--------------+------+-----+---------+----------------+
| Field     | Type         | Null | Key | Default | Extra          |
+-----------+--------------+------+-----+---------+----------------+
| id        | int(11)      | NO   | PRI | NULL    | auto_increment |
| user_id   | int(11)      | YES  | MUL | NULL    |                |
| name      | varchar(255) | YES  |     | NULL    |                |
| address1  | varchar(255) | YES  |     | NULL    |                |
| address2  | varchar(255) | YES  |     | NULL    |                |
| city      | varchar(255) | YES  |     | NULL    |                |
| state     | varchar(255) | YES  |     | NULL    |                |
| zipCode   | varchar(255) | YES  |     | NULL    |                |
| country   | varchar(255) | YES  |     | NULL    |                |
| license   | varchar(255) | YES  |     | NULL    |                |
| createdAt | datetime     | NO   |     | NULL    |                |
| updatedAt | datetime     | NO   |     | NULL    |                |
+-----------+--------------+------+-----+---------+----------------+

AGENT

+-----------+--------------+------+-----+---------+----------------+
| Field     | Type         | Null | Key | Default | Extra          |
+-----------+--------------+------+-----+---------+----------------+
| id        | int(11)      | NO   | PRI | NULL    | auto_increment |
| user_id   | int(11)      | YES  | MUL | NULL    |                |
| license   | varchar(255) | YES  |     | NULL    |                |
| headline  | varchar(255) | YES  |     | NULL    |                |
| createdAt | datetime     | NO   |     | NULL    |                |
| updatedAt | datetime     | NO   |     | NULL    |                |
| userId    | int(11)      | YES  | MUL | NULL    |                |
+-----------+--------------+------+-----+---------+----------------+

我的代码如下：

// FILE agency.js

module.exports = (sequelize, type) => {

  const Agency = sequelize.define('agency', {
    id: {
      type: type.INTEGER,
      primaryKey: true,
      autoIncrement: true,
      allowNull: false
    },
    user_id: {
      type: type.INTEGER,
      required: true
    },
    name: {
      type: type.STRING
    },
    address1: {
      type: type.STRING
    },
    address2: {
      type: type.STRING
    },
    city: {
      type: type.STRING
    },
    state: {
      type: type.STRING
    },
    zipCode: {
      type: type.STRING
    },
    country: {
      type: type.STRING
    },
    license: {
      type: type.STRING
    }
  },
  {
    freezeTableName: true,
  })

  Agency.associate = (models) => {
    Agency.belongsTo(models.user, {
      foreignKey: {
        name: 'user_id'
      }
    })
  }

  return Agency

}


// FILE agent.js

module.exports = (sequelize, type) => {

  const Agent = sequelize.define('agent', {
    id: {
      type: type.INTEGER,
      primaryKey: true,
      autoIncrement: true,
      allowNull: false
    },
    user_id: {
      type: type.INTEGER,
      required: true
    },
    license: {
      type: type.STRING
    },
    headline: {
      type: type.STRING
    }
  },
  {
    freezeTableName: true,
  })

  Agent.associate = (models) => {
    Agent.belongsTo(models.user, {
      foreignKey: {
        name: 'user_id'
      }
    })
  }

  return Agent

}


// FILE db.js

const Sequelize = require('sequelize')
const config = require('../config').db

const db = {}

let sequelize = new Sequelize(config.database, config.username, config.password, config)

db.user = require('./user')(sequelize, Sequelize)
db.agency = require('./agency.js')(sequelize, Sequelize)
db.agent = require('./agent.js')(sequelize, Sequelize)

Object.keys(db).forEach(modelName => {
  if(db[modelName].associate) {
    db[modelName].associate(db)
  }
})

db.sequelize = sequelize
db.Sequelize = Sequelize

module.exports = db

---

您可能已经在用户模型中定义了：

User.hasOne(Agent)
// In this case hasOne will add an attribute userId to the Agent model!

根据您的代码更改此：

User.hasMany(models.agency);
User.hasMany(models.agent);

User.hasMany(models.agent,{foreignKey : 'user_id'});
User.hasMany(models.agency,{foreignKey : 'user_id'});

至：

User.hasMany(models.agency);
User.hasMany(models.agent);

User.hasMany(models.agent,{foreignKey : 'user_id'});
User.hasMany(models.agency,{foreignKey : 'user_id'});

原因：如果不定义foreignKey，它将创建

userID

own

---

HasOne和BelongsTo之间的差异：

HasOne和belong可在不同型号中插入关联密钥 从对方那里。HasOne在目标模型中插入关联键 而BelongsTo在源模型中插入关联键

当源模型中存在关联信息时，我们可以 使用belongsTo。在这种情况下，播放机适合于belongsTo，因为 它有teamId列

Player.belongsTo(Team)  // `teamId` will be added on Player / Source model

当目标模型中存在关联信息时，我们可以 使用hasOne。在这种情况下，Coach适合hasOne，因为团队 模型将其Coach的信息存储为coachId字段

Coach.hasOne(Team)  // `coachId` will be added on Team / Target model

---

请添加用户模型tooThanks Vivek，我的用户模型定义了以下关联：user.associate=（models）=>{user.hasMany（models.agency）}user.associate=（models）=>{user.hasMany（models.agent）}