sequelize - 无法添加外键约束

2022-01-19 00:00:00 node.js express javascript mysql sequelize.js

我正在尝试在两个表之间设置 1:1 的关系.RefreshToken 表将有两个与 Users 表相关的 foreignKey，如下图所示:

I'm trying to set a 1:1 relation between two tables. RefreshToken table will have two foreignKey releated to Users table, as in this image:

我使用 sequelize-auto 来生成我的续集模型.

I used sequelize-auto to generate my sequelize models.

用户模型:

module.exports = function(sequelize, DataTypes) {
  return sequelize.define('Users', {
    idUsers: {
      type: DataTypes.INTEGER(11),
      allowNull: false,
      primaryKey: true
    },
    name: {
      type: DataTypes.STRING(45),
      allowNull: true
    },
    mail: {
      type: DataTypes.STRING(45),
      allowNull: false,
      primaryKey: true
    }
  }, {
    tableName: 'Users'
  });
};

RefreshToken 模型:

module.exports = function(sequelize, DataTypes) {
  return sequelize.define('RefreshToken', {
    idRefreshToken: {
      type: DataTypes.INTEGER(11),
      allowNull: false,
      primaryKey: true
    },
    token: {
      type: DataTypes.TEXT,
      allowNull: true
    },
    userId: {
      type: DataTypes.INTEGER(11),
      allowNull: false,
      primaryKey: true,
      references: {
        model: 'Users',
        key: 'idUsers'
      }
    },
    userEmail: {
      type: DataTypes.STRING(45),
      allowNull: false,
      primaryKey: true,
      references: {
        model: 'Users',
        key: 'mail'
      }
    }
  }, {
    tableName: 'RefreshToken'
  });
};

当我运行应用程序时，我收到此错误:

When I run the application, I receive this error:

未处理的拒绝错误:SequelizeDatabaseError:ER_CANNOT_ADD_FOREIGN:无法添加外键约束

Unhandled rejection Error: SequelizeDatabaseError: ER_CANNOT_ADD_FOREIGN: Cannot add foreign key constraint

我尝试添加明确的关系，在用户表中添加:

I tried to add explicit the relation, adding in Users table:

User.associate = (models) => {
    User.hasOne(models.RefreshToken, {
      foreignKey: 'userId'
    });
    User.hasOne(models.RefreshToken, {
      foreignKey: 'userEmail'
    });
  };

在 RefreshToken 中:

and in RefreshToken:

RefreshToken.associate = (models) => {
    RefreshToken.belongsTo(models.Users, {
      foreignKey: 'userId'
    });
    RefreshToken.belongsTo(models.Users, {
      foreignKey: 'userEmail'
    });
  };

但我再次收到同样的错误.如果我删除 RefreshToken 表中的引用，我看不到任何错误，但是当我检查数据库时，我看不到任何带有电子邮件和用户 ID 的外键关系约束

But I receive again the same error. If I remove the references in the RefreshToken table I don't see any error, but when I check the database I don't see any foreign key relation constraint with email and id of the User

推荐答案

这是常见的类型错误，主要是因为

This is common type error mainly occurs because of 

return sequelize.define('RefreshToken', {
    userId: {
      type: DataTypes.INTEGER(11), // The data type defined here and 
      references: {
        model: 'Users',
        key: 'idUsers'
      }
    }, 


return sequelize.define('Users', {
    idUsers: {
      type: DataTypes.INTEGER(11),  // This data type should be the same
    },

<小时>

2.当引用的键不是主键或唯一键时.

你不能有两个主键，所以其他引用的键应该定义为唯一的.unique:true

 return sequelize.define('Users', {
    idUsers: {
      primaryKey: true  
    },
    mail: {
      type: DataTypes.STRING(45),
      allowNull: false,
      primaryKey: true   // You should change this to 'unique:true'. you cant hv two primary keys in one table. 
    }

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