recent posts related to the drupal content management system

Drupal 8: How to write a simple custom “block module”

Table of Contents1 - Goals2 - Backup your database3 - Check my code out of Github, or create a module directory4 - Create a project info YAML file5 - Create the necessary subdirectories6 - Write the code to display your block7 - Clear the caches8 - Enable the module9 - Place the block module10 - See the custom block on your website11 - The biggest problem I encountered12 - The source code13 - Summary

In this tutorial I’ll demonstrate how to write a simple Drupal 8 “block module.” By this I mean that I’ll show you how to write a simple Drupal 8 module that will display output in a block. When you’re done you will have created a new block that you can place in one or more theme regions.

Getting the Drupal 8 Metatag module to show a canonical HTTPS URL alvin October 13, 2018 - 5:29pm

As a brief note, this website currently uses Drupal 8 and I was having a problem where the Metatag module was showing a canonical tag that began with http rather than https, which this website uses. The rest of this article briefly shows how I was able to fix this problem.

Best thing I’ve done to eliminate comments spam in Drupal 8 alvin May 1, 2018 - 7:43pm

After trying a lot of different anti-spam modules with Drupal 8, the best thing I’ve ever done to reduce comment spam is to go to the Drupal admin /admin/structure/types/manage/blog/fields URI, click Edit on the Comments field, and then select the “Anonymous posters may not enter their contact information.” Since I chose that option two days ago I’ve only had one spammy comment show up in my approval list. That field gave spammers a simple way to enter a URL, and without it, the spam seems to have dried up.

How to install and remove Drupal 8 modules at the command line with Composer

I find Drupal 8 module management to be confusing, but one thing I’ve learned is that you can install and remove Drupal 8 modules with Composer at the command line.

Adding a Drupal 8 module with Composer

The short story is that to add a new module — such as the reCAPTCHA anti-spam module — you type this command at the command line (in the root directory of your Drupal 8 website) to install it:

How to update a Drupal 7 website with Drush (notes)

As a brief “note to self,” this is how I just updated a Drupal 7 website using Drush. Please note that the output of some of the commands below refer to early versions of Drupal 8, but these commands also work with Drupal 7.

First, do these things:

Disabling Drupal 8 page caching significantly increases CPU use alvin April 22, 2018 - 2:53pm

As I noted five days ago, Mollom went out of business so I had to switch this Drupal 8 website to use a different module to control comment spam. I ended up adding two modules that work together, but the side effect of using their best features is that they end up disabling Drupal 8 page caching. This image clearly shows the result that disabling page caching has on CPU use.

Drupal 8 anti-spam modules, caching, and performance alvin April 17, 2018 - 7:39pm

I’m not sure why, but on April 3, 2018, the people behind the Mollom anti-spam module for Drupal basically went out of business. This meant that I either had to disable comments on this site (which I did for a while), or look at other anti-spam modules, which I did over the weekend.