ECA

Drupal automation platform, ECA module, Rules module, BPMN visualization, Typed Data integration
🕑Jan 10, 2025 🖋John Locke 💬0

Ask Freelock: ECA vs Rules

Yesterday a client asked us to install Rules module (again, repeating an earlier request, when he had missed my answer that we had installed ECA instead).

Futuristic robot with glowing eyes surrounded by text bubbles.

Automatically moderate comments using AI

When you allow the general Internet to post comments, or any other kind of content, you're inviting spam and abuse. We see far more spam comments than anything relevant or useful -- but when there is something relevant or useful, we want to hear it!

With the AI module and the Events, Conditions, and Actions module, you can set up automatic comment moderation.

Like any use of AI, setting an appropriate prompt is crucial to getting a decent result. Here's the one we're trying out:

Calendar graphic with icons for videos, heart, and photos.

Change the display of an event after it happens

Event Calendars seem to be very common on the Drupal sites we build. One of the best ways of improving engagement on a site is to add content about the event after it happens. People who attended an event might come back for a recap, or to see pictures or notes from other participants, while people who did not attend can get a sense of what a future event might be like based on your past events.

Diagram of a complex cache switch system with interconnected symbols.

Cache-bust pages containing embedded content

The saying goes, there are two hard problems in computer science: caching, naming things, and off-by-1 errors. While Drupal certainly has not solved the naming things, it has made a valiant attempt at a decent caching strategy. And for the most part it works great, allowing millions of lines of code to load up quickly the vast majority of the time.

This is more a tip about our favorite automation tool, the Events, Conditions, and Actions (ECA) module, and how it can get you out of a bind when Drupal caching goes too far.

A calendar on a screen surrounded by other notes

Automatically show future and past events in a region

Another automation we did for Programming Librarian, a site for librarians to plan educational programs, involved events. They wanted to always feature 3 events on the home page, and the most important events were in the future. If their schedule is full, they wanted 2 future and 1 past event visible -- but they don't always have upcoming events, so there might be 0, 1 or 2 future events, and 3, 2, or 1 past events.