Question

I have two classes, PSA and ZIP and the are related by PSAZIP by has_many: & :through.

I am having errors thrown with the following in each class:

psa.rb (genereated by rails g scaffold PSA)

class Psa < ActiveRecord::Base
  has_many :psazips
  has_many :zips, :through => psazips
end

psazip.rb (genereated by rails g scaffold PSAZIP)

class Psazip < ActiveRecord::Base
  belongs_to :psa
  belongs_to :zip
end

zip.rb (genereated by rails g scaffold ZIP)

class Zip < ActiveRecord::Base
  has_many:psazips
  has_many:psas, :through => :psazips
end

What is the syntax and case grammar for when both Classes are entirely Uppercase? When I have two other class relationships (PSA and State, the rb file name is psa_state.rb).

Do I have to rename the psazip.rb to psa_zip.rb? if so, where else do I need to make the change?

Answer 1

What you have should work as is.

Rails will convert any class name written in camel case to lowercase/underscore form for file names. It thinks PSAZIP is just one word. It doesn’t see it as camel case, so it generates psazip instead of psa_zip. Had you used PsaZip or PSAZip, it would have generated psa_zip.

But, everything should work as you have it, so long as you consistenly use the class name Psazip.