Axelerant Blog: Developing a custom CSV validator in Drupal 8

In our recent project, we had a requirement from one of our clients where we need to validate data in CSV files based on custom requirements. This validated CSV would need to be imported into Drupal 8 into various content types.  

In this article, we will look at the requirement, the library, the architecture of the custom module, the different components of the module with some code samples and finally adding some ideas on how this module can be made more reusable and even contributed.

Introduction

Our client is a well known international NGO with offices worldwide, each with different types of data management systems and frameworks. They wanted a centralized system to manage the data from each of these offices. Having concluded that Drupal 8 was the ideal solution to implement that centralized system, the challenge was to set up a migration pipeline to bring in data from all of the offices and their varying frameworks. Consequently, the files generated by these systems needed to be validated for specific constraints before being imported into our Drupal system.