As you may guess, however, Code Igniter comes bundled with a robust set of core classes, which can be used to perform all sorts of clever tasks, such as working with databases, performing file uploads, validating user-supplied data, and so forth. [...] I'm going to show you how to improve the MySQL-driven application developed in the preceding tutorial, since it'll be provided with the capacity for paging database records, via the pager class included with Code Igniter.

He starts by reviewing the previous part of the series, pulling the data from MySQL, then shows how to push that through the pagination component to create a simple user listing.

We have to thank Mark Story and wluigi for working on group by conditions for Cake's Model::find() method. Up until now, you would have to add your GROUP BY stuff to string'ed conditions in order to support a group by statement, which could be very ugly.

He has some code included that compares the two methods - the newer of the two applying the 'group' option as a regular condition to the query object.

This functionality is currently only in the the Release Candidate 1 but will be included in the next major release.

A small note to myself regarding a gotcha which I ran into today morning with the built in unbindModel method which lets you disassociate model relations on the fly.

He sets up a situation where his model works correctly in one case but reverts back to the bindings it started with in another. He provides a way around it - an optional parameter that forces the CakePHP framework to treat things correctly.