#287 Presenters from Scratch pro
Oct 03, 2011 | 14 minutes | Views, Refactoring
Clean up complex view logic with the help of presenters, and doing this from scratch gives you a lot of flexibility. Here I show not only how to create presenters, but how to test them using Test Unit and RSpec.
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Activity Feed from Scratch
Creating an activity feed presents some interesting challenges. Here I share my thought process behind my implementation including when to use callbacks and a few tricks with partials.
(14 minutes)
Autocomplete Search Terms
Learn how to add autocompletion to a search form and improve performance using Rack middleware, caching and switching from SQL to Redis.
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Importing CSV and Excel
Allow users to import records into the database by uploading a CSV or Excel document. Here I show how to use Roo to parse these files and present a solution for validations.
(10 minutes)
Guest User Record
Instead of presenting a sign up form to the user, consider creating a temporary guest record so the user can try out the application without filling in their information up front. They can then become a permanent member afterwards.
(9 minutes)
A Tour of State Machines
Here I show how three popular state machine gems can be used to clean up a list of boolean/datetime fields. I also show a custom solution which keeps track of the history of events.
(12 minutes)
