Hi

how about this?

category = Category.find some_id
projects = category.projects

projects = Project.find_all_by_category(some_id)  will not work,
because find_all_by_... methods work only for existing columns in
table

Hope it helps )

On 14 май, 05:30, Kenny Wan <[email protected]> wrote:
> Hello!
>
> I'm a little new to rails and have a strange problem i'm trying to
> decipher.
>
> I have a Project model and Category model, connected together by a HABTM
> (with a categorys_projects join table)
>
> Rails is doing everything as it should, apart from the find.
>
> Am I wrong to think that I should be able to go:-
>
> projects = Project.find_all_by_category(some_id)
>
> As the only way I can return projects of a certain category right now is
> using
> a join like so :
>
> projects = Project.find(:all, joins => :categories, :conditions =>
> {:categories => { :id => params[:category] } })
>
> Where:-
>
> class Project < ActiveRecord::Base
>   has_and_belongs_to_many :categories
> end
>
> class Category < ActiveRecord::Base
>   has_and_belongs_to_many :projects
> end
>
> Bit confused!
>
> Any help would be great
>
> Thanks!
> K
> --
> Posted viahttp://www.ruby-forum.com/.

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