Usng Rails ActiveRecord relationships
- by Brian Goff
I'm a newbie programmer, been doing shell scripting for years but have recently taken on OOP programming using Ruby and am creating a Rails application.
I'm having a hard time getting my head wrapped around how to use my defined model relationships.
I've tried searching Google, but all I can come up with are basically cheat sheets for what has_many, belongs_to, etc all mean.
This stuff is easy to define & understand, especially since I've done a lot of work directly with SQL.
What I don't understand is how to actually used those defined relationships.
In my case I have 3 models:
Locations
Hosts
Services
Relationships (not actual code, just for shortening it):
Services
belongs_to :hosts
Hosts
has_many :services
belongs_to :locations
Locations
has_many :hosts
In this case I want to be able to display a column from Locations while working with Services. In SQL this is a simple join, but I want to do it the Rails/Ruby way, and also not use SQL in my code or redefine my joins.
