Rails - Jul 2007 - Curious why this doesn't work. (has_many, belongs_to)

Two Models.

class Gm < ActiveRecord::Base
  belongs_to :pool

  # mode code here.
end

class Pool < ActiveRecord::Base
  has_many :gms

  # mode code here.
end

Testing code through the console.
>> gm_list.each{ | gm | puts " GM name: #{ gm.user_name } belongs to
Pool: #{ gm.pool.pool_name } " }; nil
 GM name: John belongs to Pool: RHP 07-08 Season - Career League
 GM name: Stef belongs to Pool: RHP 07-08 Season - Career League
 GM name: Chris belongs to Pool: RHP 07-08 Season - Career League
=> nil
>> 
Works nice!

Inversely.. this doesn''t...
>> pool = Pool.find_all
=> [#<Pool:0xb7022dc8 @attributes={"last_modified"=>nil,
"id"=>"1",
"salary_cap"=>"40000000",
"pool_name"=>"RHP 07-08 Season - Career
League", "created"=>nil}>]
>> puts  pool.gm
NoMethodError: undefined method `gm'' for #<Array:0xb7022ee0>
        from (irb):8
>> puts  pool.gms
NoMethodError: undefined method `gms'' for #<Array:0xb7022ee0>
        from (irb):9
>> puts pool.gms.each {|g| puts "Gm in this pool:
#{gm.user_name}" }; nil
NoMethodError: undefined method `gms'' for #<Array:0xb7022ee0>
        from (irb):10

I thought that specifying a ''belongs_to'' and
''has_many'' relationship
would automatically allow me to navigate my data in both directions.

Any comments are welcome.

Thanks!
-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Jean Nibee wrote:
> Two Models.
> 
> class Gm < ActiveRecord::Base
>   belongs_to :pool
> 
>   # mode code here.
> end
> 
> class Pool < ActiveRecord::Base
>   has_many :gms
> 
>   # mode code here.
> end
> 
> Testing code through the console.
> 
>>> gm_list.each{ | gm | puts " GM name: #{ gm.user_name } belongs
to Pool: #{ gm.pool.pool_name } " }; nil
>  GM name: John belongs to Pool: RHP 07-08 Season - Career League
>  GM name: Stef belongs to Pool: RHP 07-08 Season - Career League
>  GM name: Chris belongs to Pool: RHP 07-08 Season - Career League
> => nil
>>> 
> 
> Works nice!
> 
> Inversely.. this doesn''t...
> 
>>> pool = Pool.find_all
> => [#<Pool:0xb7022dc8 @attributes={"last_modified"=>nil,
"id"=>"1",
> "salary_cap"=>"40000000",
"pool_name"=>"RHP 07-08 Season - Career
> League", "created"=>nil}>]
>>> puts  pool.gm
> NoMethodError: undefined method `gm'' for #<Array:0xb7022ee0>
>         from (irb):8
>>> puts  pool.gms
> NoMethodError: undefined method `gms'' for
#<Array:0xb7022ee0>
>         from (irb):9
>>> puts pool.gms.each {|g| puts "Gm in this pool:
#{gm.user_name}" }; nil
> NoMethodError: undefined method `gms'' for
#<Array:0xb7022ee0>
>         from (irb):10
> 
> I thought that specifying a ''belongs_to'' and
''has_many'' relationship
> would automatically allow me to navigate my data in both directions.
> 
> Any comments are welcome.
> 
> Thanks!
Well I figured out why...

I forgot to realize that ''pool'' (in my above examples) is not
an
instance of a pool in this case, it''s an array that needs to be
iterated
and then each iteration needs to have the ''p.gms.each''
performed on
it....

Like so:
>> pools = Pool.find_all.each{ |p| p.gms.each { |g| puts "GMs in pool
#{ g.user_name }" } }; nil
GMs in pool John
GMs in pool Stef
GMs in pool Chris
=> nil

Sorry about the spam. :)

(P.S. Damn I love code blocks in Ruby)
-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---