续集复合外键

我有一个数据库与下表：

CREATE TABLE IF NOT EXISTS `app_user` ( `user_id` INT NOT NULL, `user_name` VARCHAR(45) NOT NULL, PRIMARY KEY (`user_id`)) ENGINE = InnoDB; CREATE TABLE IF NOT EXISTS `user_folder` ( `user_id` INT NOT NULL, `document_id` INT NOT NULL, PRIMARY KEY (`user_id`, `document_id`), CONSTRAINT `fk_user_document_user` FOREIGN KEY (`user_id`) REFERENCES `zinc`.`app_user` (`user_id`) ON DELETE CASCADE ON UPDATE CASCADE) ENGINE = InnoDB; CREATE TABLE IF NOT EXISTS `folder_content` ( `user_id` INT NOT NULL, `document_id` INT NOT NULL, `content_id` INT NOT NULL, PRIMARY KEY (`user_id`, `document_id`, `content_id`), CONSTRAINT `fk_folder_content_folder` FOREIGN KEY (`user_id` , `document_id`) REFERENCES `zinc`.`user_folder` (`user_id` , `document_id`) ON DELETE CASCADE ON UPDATE CASCADE) ENGINE = InnoDB; 

我需要创build一个Sequelize模型来表示它。 我唯一的问题是关系folder_content和user_folder因为复合键。

我怎样才能创build这个sequelize模型？

这是我迄今为止：

 var AppUser = sequelize.define('app_user', {userId: {type: Sequelize.INTEGER, primaryKey: true, field: 'user_id'}, ... } ); var UserFolder = sequelize.define('user_folder', {userId: {type: Sequelize.INTEGER, primaryKey: true, field: 'user_id'}, documentId: {type: Sequelize.INTEGER, primaryKey: true, field: 'document_id'}... }); var FolderContent = sequelize.define('folder_content', { userId: {type: Sequelize.INTEGER, primaryKey: true, field: 'user_id'}, documentId: {type: Sequelize.INTEGER, primaryKey: true, field: 'document_id'}, contentId: {type: Sequelize.INTEGER, primaryKey: true, field: 'content_id'}... }); UserFolder.hasMany(FolderContent); FolderContent.belongsTo(UserFolder, {foreingKey: !! });// <- PROBLEM