Express 如何为sequelize模型添加公共属性?

Express 如何为sequelize模型添加公共属性?,express,sequelize.js,feathersjs,Express,Sequelize.js,Feathersjs,我正在尝试使用Sequalize中的钩子向模型添加公共属性, 我定义了一个全局钩子,如下所示 module.exports = function (app) { const sequelizeClient = app.get('sequelizeClient'); sequelizeClient.addHook('beforeDefine', (attributes) => { var defaultAttributes = { id: { ty

我正在尝试使用Sequalize中的钩子向模型添加公共属性, 我定义了一个全局钩子,如下所示

module.exports = function (app) {
  const sequelizeClient = app.get('sequelizeClient');
  sequelizeClient.addHook('beforeDefine', (attributes) => {
    var defaultAttributes = {
      id: {
        type: Sequelize.INTEGER,
        autoIncrement: true,
        primaryKey: true
      },
      createdBy: {
        type: Sequelize.INTEGER,
      },
      updatedBy: {
        type: Sequelize.INTEGER,
      },
      deletedBy: {
        type: Sequelize.INTEGER,
      }
    };
    Object.assign(attributes, defaultAttributes);
    //return attributes;
  });
};
但是即使钩子被触发,属性仍然没有添加到模型中。我从这里得到了为公共属性添加挂钩的想法。我做错了什么?或者有没有更好的方法来添加公共属性

请注意,我使用mysql作为后端数据库。我使用的sequelize模型如下所示

module.exports = function (app) {
  const sequelizeClient = app.get('sequelizeClient');
  const person = sequelizeClient.define('person', {
    name: {
      type: DataTypes.STRING,
      allowNull: false
    }
  }, {
    hooks: {
      beforeCount(options) {
        options.raw = true;
      }
    }
  });

  person.associate = function (models) { // eslint-disable-line no-unused-vars
    // Define associations here
    // See http://docs.sequelizejs.com/en/latest/docs/associations/
  };

  return person;
};