Drupal

Following up on my previous article about using Drupal migrations to modify content, this article looks at importing new content into a site. I give examples of migrations that create paragraphs, nodes, URL aliases, and URL redirects.

Drupal’s migration system was primarily designed for migrating data into a site from an older version of Drupal or from some other CMS. Here I present examples of using Migrate API for a different use case: moving and adding content within a site that’s being restructured.

Recently I was adding a photo gallery page to a Drupal 9 site. When a photo was clicked/tapped, the link was supposed to take you to a larger version of the image. Instead, to my surprise, it gave a “page not found” error.

I’ve been researching issues regarding serving HTML5 video content to iOS devices this past week. Here’s an outline the issues and some concise answers as to how iOS Mobile Safari 6 will handle HTML5 video. This post won’t touch on video encoding.

Mobile Safari’s QuickTime component does not handle HTTP requests the same as it does normally, say for a web page. Instead

At times I am confused by behavior in the powerful Rules module. Sometimes Rules data selectors for entities have their fields listed and sometimes they do not. I did not find documentation about this behavior.

So I dug through code…

Here’s a way to create a View (Drupal 7, Views 3.x) that lets you browse an arbitrarily-deep taxonomy hierarchy. With this type of browser you can link, oh, say, a large collection of videos, or photo galleries, or any kind of huge list of content categorized in a nested tree.

First, an simple static taxonomy term browser:

A quick tip for Views newbies…

In Views 2.x (Drupal 6.x), if you want to add or remove fields in a Views display, and you want that to override the Defaults display instead of updating it:

1. In the display, click the Rearrange button next to Fields.
2. Click Override, then Update.
3. Add or remove any fields you want.

Need to store up some items and process them en masse in a cron job? That’s a perfect use case for the Queue API (for Drupal 7+) or the drupal_queue module (the backport for Drupal 6).

Concrete example: One of our consulting clients was using a synchronous webservice for their retail store locator. We needed to create a form where store owners could change whether they’re listed in the store locator. When a store owner submits the form, should she have to wait around while our site sends her change to the store locator webservice? We didn’t think so. So we decided to use Drupal’s Queue API, which lets us save up all the store owners’ changes and send them to the webservice in a batch.

Here’s a simple example of adding items to a queue in a form submit handler and processing them in the next cron run.

The Chaos tool suite (ctools) is collection of useful methods intended to help Drupal developers create complex interfaces without duplicating too much effort.

Drupal 7 introduced a new Form API element: Vertical Tabs. When you set a parent element as this Form API type, then any child elements that are of type fieldset are displayed as vertical tabs instead of as in the traditional fieldset. Unfortunately for us developers, the documentation does not provide an example of how to use Vertical Tabs properly, but with some trial and error you can do it.

However, this new Vertical Tab Form API element doesn’t work in modal multistep wizard forms created with ctools.

Last Saturday at DrupalCamp Ohio, I presented an introduction to the basic concepts behind the Open Atrium Drupal install profile, and a demonstration of how to create custom Open Atrium Features.