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Create a custom field plugin with custom validation constraint in drupal

Creating a custom field plugin in Drupal involves several steps, including defining the field type, creating the field widget and formatter, and defining the storage schema for the field.

How to alter existing service in Drupal 9 ?

In this article, we will explore the concept of service providers in Drupal and show you how you can use them to alter services in your own Drupal projects.

How to connect Drupal 9 to Salesforce?

In this blog you will learn how to set up Drupal Salesforce Integration by synchronizing Drupal entities with Salesforce objects. It provides a step-by-step guide to help you create a Salesforce application and connect it with drupal 9. 

Create unique field in a content type

If you want to add a unique field to content type so that Drupal would prevent you from entering the same field value more than once you can add a validation constraint to your field. There is two ways to do that:

How to properly structure custom code in Drupal 8/9/10 ?

When your custom module or theme start to get bigger and you add a lot of hooks in your .module or .theme files it becomes unreadable and hard to maintain with thousands of code lines.