will-paginate, ajax, and Rails 2.1
First up. I was suddenly faced with the need to display a kind of master-detail kind of data. But only one “master” record needed to be visible at a time. Perfect, I thought, I can use will-paginate to flip thru the master records, with a :per_page => 1. But… this data is embedded in a page with reams of other data, and I don’t want to re-display the whole thing, just to page thru my master records. Ok, that should be simple enough, I just need to make the will-paginate links :remote, and only update the div with my master-detail data.
After searching for “will-paginate and ajax” and “will-paginate and remote”, I eventually found:
This is a great posting. Too bad it didn’t work for me. But I persevered, and read down thru all the comments, and finally, at comment #23, I found my solution. This particular project is stuck back on Rails 2.1. The original posting was updated for Rails 2.3. But Kiran Achyutunikindly posted his, revised, solution for Rails 2.1. I plugged it in, and it worked.
In the course of writing specs for the above solution, I was trying to mock out the result of the WillPaginate.paginate call. Although associations are not directly related to paginate, paginate acts enough like an association that I followed a link to this posting, and it provided the hints I needed:
Ajax radio buttons
In addition to the “paging” of my master-detail data, I also discovered the need to filter the master records in two different ways. Since ajaxifying the paging links worked so well, I decided that would work with my 2 new radio buttons as well.
Again, this is a Rails 2.1 app, so I’m sticking with the older conventions, and this page provided easy examples of what I wanted to do:
That’s it for today.