has_many :through - Not the post
This is not the post I wanted to write. The post that I wanted to write, that I in fact have mostly written and would have posted days ago if not for this distraction, was about what a great success Golden Gate Ruby Conference was and how proud we are of putting on a top-notch conference that raised the bar in many ways. But I'm the person who is responsible for the technical program at the confer
has_many :through - Migration Concordance
If you are a solo developer, Rails' migrations are the neatest thing since sliced bread. If you work on a team, you know that often it can be a real pain dealing with migrations. Someone on your team checks in a new migration and you don't notice it when you svn up or git pull, and suddenly all your tests are breaking. Or even worse, someone modifies an old migration and you need to reset and migr
has_many :through - count vs length vs size
In Ruby, #length and #size are synonyms and both do the same thing: they tell you how many elements are in an array or hash. Technically #length is the method and #size is an alias to it. In ActiveRecord, there are several ways to find out how many records are in an association, and there are some subtle differences in how they work. post.comments.count - Determine the number of elements with an S
has_many :through - Self-referential has_many :through associations
This article updates a previous version for the Rails 2.0 way of things. Since there's not much difference, I decided to fix up the example code to be more understandable. After all, not everyone is a discrete math geek. This example updates the one from the previous article. The only significant difference is that you don't need to specify the :foreign_key when using the :class_name option in a b
has_many :through - Book Review: Pro Active Record
I've been wanting to start doing some book reviews for a while, so here goes. The folks at Apress have been kind enough to send me review copies of a couple books, so I'm going to start with one of them. First up, Pro Active Record. Title: Pro Active Record: Databases with Ruby and Rails Authors: Kevin Marshall, Chad Pytel, Jon Yurek Publisher: Apress My first thought at seeing this book was, "Hey
has_many :through - New on edge: inferred foreign key name change
Here's a change that has been a long time coming. (Really. The first time I heard DHH mention he wanted to do this was in March of 2006.) I liked it so much that I've been playing shepherd for it to make sure it happens. So if you're on edge, now is the time. In 1.2.x and previous, the name of the foreign key of a belongs_to association is inferred to be the name of the association's class plus "_
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has_many :through - It's a wrap!
has_many :through - Book Review: The Rails Way
has_many :through - Check out your routes