44-Nodejs Course 2023: Destroying The Model

We've proceeded with a nice progress in the saving process, now let's go to the deleting step of the model.

Destroy Method

It actually works exactly like the delete method except that the destroy method will be called from the model itself directly.

// src/core/database/model/model.ts
  /**
   * Delete the document from database
   */
  public async destroy() {
    await queryBuilder.deleteOne(this.getCollectionName(), {
      _id: this.data._id,
    });
  }

Nothing new here, we just called the query builder to delete the document from the database.

Now the model will keep the data in the memory, but it will be deleted from the database.

Let's give it a try

import User from './models/users';

const user = await User.find(1);

if (user) {
    await user.destroy();
}

And that's it!

But what if we called it in a model that does not have an id?

In that case we shall skip the deletion process and just return the model instance.

// src/core/database/model/model.ts
  /**
   * Delete the document from database
   */
  public async destroy() {
    if (! this.data._id) return;

    await queryBuilder.deleteOne(this.getCollectionName(), {
        _id: this.data._id,
      });
  }

🎨 Conclusion

We added a new method called destroy which will delete the document from the database using the model itself.

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