How to Get Changed Fields in Doctrine 2 Entities?

Getting Changed Fields in Doctrine 2 Entities

When working with Doctrine 2 entities, it is often necessary to retrieve a list of fields that have been updated. This information is essential for triggering certain actions or maintaining consistency in the database. Does Doctrine 2 offer a built-in solution for this task?

The answer is yes. By using the DoctrineORMEntityManager#getUnitOfWork method, you can access a UnitOfWork object. Subsequently, using DoctrineORMUnitOfWork#computeChangeSets() will initiate the calculation of change sets for managed entities. This step is essential for obtaining the information you need.

Furthermore, the DoctrineORMUnitOfWork#getEntityChangeSet($entity) method provides access to the change sets associated with a specific entity. It grants you visibility into all changes made to the object.

To illustrate this process, consider the following code:

$entity = $em->find('My\Entity', 1);

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