starr-philproperties/apps/api/models/users/user_activity.mdl.js

const { DataTypes } = require('sequelize');
const sequelize = require('../../config/db.config');
const mdl_Users = require('./users.mdl');

const mdl_UserActivity = sequelize.define('UserActivity', {
  activity_id: { type: DataTypes.BIGINT, primaryKey: true, autoIncrement: true },
  user_id:     { type: DataTypes.BIGINT, allowNull: false, references: { model: mdl_Users, key: 'user_id' } },
  session_id:  { type: DataTypes.BIGINT, allowNull: true },
  action:      { type: DataTypes.STRING(100), allowNull: false },
  entity_type: { type: DataTypes.STRING(50), allowNull: true },
  entity_id:   { type: DataTypes.BIGINT, allowNull: true },
  /**
   * details JSONB — free-form context per action, e.g.:
   *   login            : { session_id, reg_type }
   *   deactivate_user  : { target_email }
   *   lesson_read      : { lesson_uuid, status }
   *   submit_task      : { task_id }
   *   set_user_status  : { is_active }
   */
  details:     { type: DataTypes.JSONB, allowNull: true },
  created_at:  { type: DataTypes.DATE, allowNull: true, defaultValue: DataTypes.NOW },
}, {
  tableName:  'user_activity',
  timestamps: false,
});

mdl_UserActivity.belongsTo(mdl_Users, { foreignKey: 'user_id', as: 'user' });
mdl_Users.hasMany(mdl_UserActivity, { foreignKey: 'user_id', as: 'activities' });

module.exports = mdl_UserActivity;