For one of my clients, I built a customer web portal in Rails, and I used the ActiveAdmin gem to provide a slick administrative interface. The site also uses Resque to process background jobs, and the Resque web interface is mounted within the Rails application.
With these components in place, I wanted to provide cross-linking navigation menu (“navbar”) items within the application itself, within ActiveAdmin, and within the Resque web engine.
The application navbar is easy, of course, since it’s entirely under my control. Adding links to Resque web and ActiveAdmin navbars is more challenging.
Here’s how I did it.
Hacking Resque Web
I wanted the Resque Web navbar to contain two additional links:
- “Live Site” links back to the application.
- “Admin” links to the ActiveAdmin interface.
Adding these links turns out to be ugly, but workable. First, I added a file
lib/resque_additions.rb, containing the following code. This code
augments the existing Resque Sinatra application to include two new routes.
This is a complete hack.
I need to augment it to use the Rails helpers, to decouple it from
routes.rb file. I haven’t yet taken the time to figure out how
to do that properly.
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Next, I simply
require that file in the
and the Resque web interface is automatically augmented when Rails starts.
By default, ActiveAdmin provides a “Live Site” navbar link that points back to the main application. I needed a “Jobs” link to point to the Resque web interface.
I’m using ActiveAdmin 0.5.0, which has support for extending or overriding the menu, utility menu, header and footer. Adding the “Jobs” link to the header menu in ActiveAdmin is relatively simple, once you figure out how. The “figure out how” part required some spelunking through the ActiveAdmin source, because this new feature is not especially well-documented yet.
Here’s what I came up with. Someone more knowledgeable is welcome to correct me on the finer points.
First, in your
routes.rb file, modify the line where you mount the Resque
web application, so that it defines a URL helper path:
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Next, we’re going to make two changes to
The first change is to add the following class to the top of the file:
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Next, wire it into ActiveAdmin within the
setup block, as shown below:
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Now, when you fire up Rails, you should have “Live Site” and “Admin” links within the Resque web interface’s navigation menu (“navbar”), and you should have an additional “Jobs” link within the ActiveAdmin navigation menu (“navbar”).
Your mileage may vary, but this worked for me.