I want to start using has_many :through. I think that eventually I’ll
be removing all uses has_and_belongs_to_many from my project.
Here is my situation
I’m using SVN
I want to use edge rails
Reading the wiki about switching to edge rails, I can’t figure out
which combination of subsections I must perform.
Do I want edge rails to reside in the vendor directory?
Will this make SVN checkouts of my project take a long time?