Rails - Feb 2008 - has_many and belongs_to in rails 2.0.2 (child.Parent) is not working

Hi All

I have 2 models working well in rails 1.2.6 :

class TypeService < ActiveRecord::Base
    has_many :Services
end

class Service < ActiveRecord::Base
  belongs_to :TypeService
 end

I was able to get the name of the service with Rails 1.2.3:

 s = Service.find(1)
 name_type_service = s.TypeService.name    <<-- Now with rails 2.0.2
that doesn''t work

With rails 2.0.2

s = Service.find(1)
s.TypeService.name
nil             <<-- TypeService is nil with rails 2.0.2

Does any one know why that "child.parent"  is not working with rails
2.0.2 anymore?

Thank you very much for your help

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On 22 Feb 2008, at 15:53, hhvm wrote:
>
> Hi All
>
> I have 2 models working well in rails 1.2.6 :
>
> class TypeService < ActiveRecord::Base
>    has_many :Services
> end
>
> class Service < ActiveRecord::Base
>  belongs_to :TypeService
> end
The expected names would be has_many :services and  
belongs_to :type_service. It''s possible that 2.0 is enforcing this  
more strictly.

Fred.
>
>
> I was able to get the name of the service with Rails 1.2.3:
>
> s = Service.find(1)
> name_type_service = s.TypeService.name    <<-- Now with rails 2.0.2
> that doesn''t work
>
> With rails 2.0.2
>
> s = Service.find(1)
> s.TypeService.name
> nil             <<-- TypeService is nil with rails 2.0.2
>
> Does any one know why that "child.parent"  is not working with
rails
> 2.0.2 anymore?
>
> Thank you very much for your help
>
> >

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Thank you very much but I just changed  that,  and No, that is still
not working.

I''m not sure why I''m not able to get the Parent class in rails
1.2.3
that was working well.

parent = child.Parent  <<-- that was i
nil                              <<-- nil with rails 2.0.2

On Feb 22, 10:58 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 22 Feb 2008, at 15:53, hhvm wrote:
>
>
>
> > Hi All
>
> > I have 2 models working well in rails 1.2.6 :
>
> > class TypeService < ActiveRecord::Base
> >    has_many :Services
> > end
>
> > class Service < ActiveRecord::Base
> >  belongs_to :TypeService
> > end
>
> The expected names would be has_many :services and
> belongs_to :type_service. It''s possible that 2.0 is enforcing this
> more strictly.
>
> Fred.
>
>
>
> > I was able to get the name of the service with Rails 1.2.3:
>
> > s = Service.find(1)
> > name_type_service = s.TypeService.name    <<-- Now with rails
2.0.2
> > that doesn''t work
>
> > With rails 2.0.2
>
> > s = Service.find(1)
> > s.TypeService.name
> > nil             <<-- TypeService is nil with rails 2.0.2
>
> > Does any one know why that "child.parent"  is not working
with rails
> > 2.0.2 anymore?
>
> > Thank you very much for your help
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hhvm wrote:
> parent = child.Parent  <<-- that was i
> nil                              <<-- nil with rails 2.0.2
It depends on the definition of your services table.  The standard way 
is for the services table to contain a column called type_service_id and 
then use:

class TypeService < ActiveRecord::Base
  has_many :services
end

class Service < ActiveRecord::Base
  belongs_to :type_service
end

s = Service.find(1)
name_type_service = s.type_service.name

The arguments to "has_many" and "belongs_to" become methods
in the class
which return the connected object(s) from the other class.  The 
"belongs_to" method returns a single object and the
"has_many" method
returns an array of objects, so similarly:

t = TypeService.find(1)
services_for_t = t.services

Here services_for_t is now a (possibly empty) array of Service objects.

If the column in your services table is called something else, then you 
need to specify it as the foreign key in the relation, so if this column 
is typeservice_id, for example, use:

class TypeService < ActiveRecord::Base
  has_many :services, :foreign_key => :typeservice_id
end

class Service < ActiveRecord::Base
  belongs_to :type_service, :foreign_key => :typeservice_id
end

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

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Thank you very much,

I got it I was using TypeService
 like :

belongs_to :TypeService

I change it to

belongs_to :type_service

now that is working,

Thank you Mark for your help.

Regards

On Feb 22, 2:05 pm, Mark Bush
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> hhvm wrote:
> > parent = child.Parent  <<-- that was i
> > nil                              <<-- nil with rails 2.0.2
>
> It depends on the definition of your services table.  The standard way
> is for the services table to contain a column called type_service_id and
> then use:
>
> class TypeService < ActiveRecord::Base
>   has_many :services
> end
>
> class Service < ActiveRecord::Base
>   belongs_to :type_service
> end
>
> s = Service.find(1)
> name_type_service = s.type_service.name
>
> The arguments to "has_many" and "belongs_to" become
methods in the class
> which return the connected object(s) from the other class.  The
> "belongs_to" method returns a single object and the
"has_many" method
> returns an array of objects, so similarly:
>
> t = TypeService.find(1)
> services_for_t = t.services
>
> Here services_for_t is now a (possibly empty) array of Service objects.
>
> If the column in your services table is called something else, then you
> need to specify it as the foreign key in the relation, so if this column
> is typeservice_id, for example, use:
>
> class TypeService < ActiveRecord::Base
>   has_many :services, :foreign_key => :typeservice_id
> end
>
> class Service < ActiveRecord::Base
>   belongs_to :type_service, :foreign_key => :typeservice_id
> end
>
> --
> Posted viahttp://www.ruby-forum.com/.
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