乔达诺，
我这样定义代码如下。让我知道为什么这个代码可以迁移？主键和唯一键这两个键都是写的。。
创建-order-detail.js

'use strict';
module.exports = {
  up: (queryInterface, Sequelize) => {
    return queryInterface.createTable('OrderDetails', {
          (...),
          productName: {
            type: Sequelize.STRING,
            primaryKey: true,
            // allowNull: false
            unique: true
          },
          count: {
            type: Sequelize.INTEGER
          },
          orderDetailPrice: {
            type: Sequelize.INTEGER,
            onDelete: 'CASCADE',
            // references: {
            //     model: 'Orders',
            //     key: 'totalPrice'
            // }
          },
          createdAt: {
            allowNull: false,
            type: Sequelize.DATE
          },
          updatedAt: {
            allowNull: false,
            type: Sequelize.DATE
          }
        })
      .then(() => {
        queryInterface.addConstraint('OrderDetails', ['orderDetailPrice'], {
          type: 'foreign key',
          references: {
            name: 'orderdetails_ibfk_2',
            table: 'Orders',
            field: 'totalPrice'
          },
        })
      })
  },
  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable('OrderDetails');
  }
};

如本文所述，sequelize在引用复合键时似乎存在一些问题。
然而，通过利用sequelize查询执行，您可以解决您的问题。在这种情况下，您可以执行以下mysql查询：

ALTER TABLE `db_test`.`OrderDetails` ADD CONSTRAINT `fk_order_detailes_orders` 
FOREIGN KEY (`orderId` , `orderDetailId`) 
REFERENCES `db_test `.`orders`(`orderId` , `totalPrice`);

因此，您的“创建订单明细”迁移文件将变为以下内容：

'use strict';
    module.exports = {
        up: (queryInterface, Sequelize) => {
            return queryInterface.createTable('OrderDetails', {
                orderDetailId: {
                    type: Sequelize.INTEGER.UNSIGNED,
                    primaryKey: true,
                    allowNull: false,
                    autoIncrement: true,
                },
                orderId: {
                    type: Sequelize.INTEGER,
                    allowNull: false,
                },
                productName: {
                    type: Sequelize.STRING,
                    primaryKey: true,
                    allowNull: false,
                },
                count: {
                    type: Sequelize.INTEGER,
                },
                orderDetailPrice: {
                    type: Sequelize.INTEGER,
                    allowNull: false,
                },
                createdAt: {
                    allowNull: false,
                    type: Sequelize.DATE,
                },
                updatedAt: {
                    allowNull: false,
                    type: Sequelize.DATE,
                },
            })
                .then(() => {
                    return queryInterface.sequelize.query('ALTER TABLE `OrderDetails` ADD ' +
                        'CONSTRAINT `fk_order_details_orders` FOREIGN KEY (`orderId`, `orderDetailPrice`) REFERENCES ' +
                        'Orders(`orderId`, `totalPrice`)');
                });
        },
        down: (queryInterface, Sequelize) => {
            return queryInterface.dropTable('OrderDetails', null);
        },
    };