我有以下结构:varUser=sequelize.define('user',{name:DataTypes.STRING});varPost=sequelize.define('post',{text:DataTypes.STRING});varPostComment=sequelize.define('postComment',{id:{type:DataTypes.BIGINT,primaryKey:true,autoIncrement:true},comment:DataTypes.TEXT});Post.belongsToMany(User,{as:'postUserComm