未在MySQL、PostgreSQL和SQLite中创建的Sequelize关联

我使用sequalize和MYSQL在模型中定义关联。但是在迁移之后，外键不会像sequelize文档中所解释的那样添加到目标模型中

我还尝试在模型和迁移文件中手动定义外键，但仍然没有在表之间创建关联。当我在PhpMyAdmin的关系视图中查看表时，不会创建外键约束或关系

我已经用SQLite和PostgreSQL尝试过了，结果都是一样的。我不知道我做错了什么。这些是模型

AURHOR MODEL
//One author hasMany books

'use strict';
module.exports = (sequelize, DataTypes) => {
  const Author = sequelize.define('Author', {
    Name: DataTypes.STRING
  }, {});
  Author.associate = function(models) {
    // associations can be defined here
    Author.hasMany(models.Book)
  };
  return Author;
};

我希望sequelize按照文档中的指定在books表中添加authorId，但这不会发生

 BOOK MODEL
    //Book belongs to Author
    'use strict';
    module.exports = (sequelize, DataTypes) => {
      const Book = sequelize.define('Book', {
        Title: DataTypes.STRING
      }, {});
      Book.associate = function(models) {
        // associations can be defined here
        Book.belongsTo(models.Author)
      };
      return Book;
    };

迁移后，不会在这两个表之间创建关联。 我还尝试在模型关联中定义自定义外键，如下所示：

//Author model
    Author.hasMany(models.Book,{foreignKey:'AuthorId'})
 //Book model
 Book.belongsTo(models.Author,{foreignKey:'AuthorId'})

  'use strict';
    module.exports = (sequelize, DataTypes) => {
      const Book = sequelize.define('Book', {
        Title: DataTypes.STRING,
        AuthorId:DataTypes.INTEGER
      }, {});
      Book.associate = function(models) {
        // associations can be defined here
        Book.belongsTo(models.Author,{foreignKey:'AuthorId'})
      };
      return Book;
    };

这仍然不能解决问题

我已经开始在模型中定义外键，然后在关联中引用它们，如下所示：

//Author model
    Author.hasMany(models.Book,{foreignKey:'AuthorId'})
 //Book model
 Book.belongsTo(models.Author,{foreignKey:'AuthorId'})

  'use strict';
    module.exports = (sequelize, DataTypes) => {
      const Book = sequelize.define('Book', {
        Title: DataTypes.STRING,
        AuthorId:DataTypes.INTEGER
      }, {});
      Book.associate = function(models) {
        // associations can be defined here
        Book.belongsTo(models.Author,{foreignKey:'AuthorId'})
      };
      return Book;
    };

但仍然没有建立任何关联

我最终决定在迁移文件中添加引用，如下所示：

'use strict';
module.exports = {
  up: (queryInterface, Sequelize) => {
    return queryInterface.createTable('Books', {
      id: {
        allowNull: false,
        autoIncrement: true,
        primaryKey: true,
        type: Sequelize.INTEGER
      },
      Title: {
        type: Sequelize.STRING
      },

      AuthorId:{
          type: Sequelize.INTEGER,
          references:{
          model:'Author',
          key:'id'
          }

      }

      createdAt: {
        allowNull: false,
        type: Sequelize.DATE
      },
      updatedAt: {
        allowNull: false,
        type: Sequelize.DATE
      }
    });
  },
  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable('Books');
  }
};

但当我运行这种迁移设置时，我得到了以下错误：错误：无法创建表

dbname

books

（错误号：150“外键约束为I 不正确形成的“）

当我切换到PostgreSQL时，也会出现类似的错误

---

这个问题耽搁了我很长时间。我可能做错了什么。我正在将sequelize版本4.31.2与sequelize CLI一起使用

我在迁移中错误地引用了模型。 走错了路

 AuthorId:{
          type: Sequelize.INTEGER,
          references:{
          model:'Author',
          key:'id'
          }

      }

  // Notes the model value is in lower case and plural just like the table name in the database
     AuthorId:{
              type: Sequelize.INTEGER,
              references:{
              **model:'authors',**
              key:'id'
              }

      }

正确的方法

 AuthorId:{
          type: Sequelize.INTEGER,
          references:{
          model:'Author',
          key:'id'
          }

      }

  // Notes the model value is in lower case and plural just like the table name in the database
     AuthorId:{
              type: Sequelize.INTEGER,
              references:{
              **model:'authors',**
              key:'id'
              }

      }

这解决了我的问题。现在正在定义关联