Sequelize ORM Soft Delete and Flag Usage

Introduction: What are Soft Delete and Flag?

Sequelize ORM is a powerful library frequently used for relational database management with Node.js. The concepts of "soft delete" and "flag" are critically important, especially for maintaining data integrity and developing flexible solutions in admin panels and log analysis. Soft delete means marking a record (for example by adding a deletedAt date) instead of physically deleting it, while a flag ensures that additional statuses (isActive, isPublished etc.) are maintained on the record. By using soft delete and flags with Sequelize ORM, you can reduce the risk of data loss in your projects and make user mistakes reversible.

Using Soft Delete in Sequelize ORM

To perform a soft delete, you must activate the paranoid property in your Sequelize model. Thanks to this feature, the destroy function updates the relevant record's deletedAt field instead of physical deletion, and automatically hides deleted data in queries.

const User = sequelize.define('User', {
  name: {
    type: Sequelize.STRING,
    allowNull: false
  }
}, {
  paranoid: true // Soft delete active!
});

// Deleting a record (soft delete)
await User.destroy({ where: { id: 1 } });
// The deletedAt field is updated, data is not deleted

// Only active records (not deleted) are retrieved
const users = await User.findAll();

// All records (including deleted ones) are retrieved
const allUsers = await User.findAll({ paranoid: false });

More Flexible Control With Flag Usage

Using flags provides flexibility over the status of the record. For example, you can manage whether a user is active or passive with a isActive boolean field. In this way, together with soft delete, you can control multiple statuses and, for instance, easily distinguish between temporarily closed users and those that are completely deleted.

const User = sequelize.define('User', {
  name: {
    type: Sequelize.STRING,
    allowNull: false
  },
  isActive: {
    type: Sequelize.BOOLEAN,
    defaultValue: true
  }
}, {
  paranoid: true
});

// Deactivating a user
await User.update({ isActive: false }, { where: { id: 1 } });
// Retrieving only active users
const activeUsers = await User.findAll({ where: { isActive: true } });

Conclusion: Advantages of Soft Delete and Flag

The usage of soft delete and flags in Sequelize ORM is indispensable for modern applications regarding data loss, the need to revert, and detailed user management. Using both methods together provides flexible and secure data management. By integrating this easily into your project, you can recover mistakenly deleted data and make your processes much more controlled with additional status checks. The use of soft delete plus flags is especially recommended for those developing admin panels or working with big data.