Question

In Rails 3.2.1

I have:

class Project < ActiveRecord::Base
  attr_accessible :name, :description
  has_many :subprojects
end


class SubProject < ActiveRecord::Base
  attr_accessible :id_name, :description, :num_alloc, :project_id
  belongs_to :projects
end

How can i return in a rails controller, an object that contain the “name” attribute (from the Project model) and the id_name, description and num_alloc (from the SubProject model).

In the controller, if i make

@results=  SubProject.joins('LEFT OUTER JOIN.......)

@results contains only the attribute of the SubProject class because SubProject.joins(...) returns an SubProject object right?

So how can i return an object with attribute from the two model?

Answer 1

I would start at your model definitions: Your has_many association needs to have an underscore in the name – SubProject -> sub_project:

class Project < ActiveRecord::Base
 attr_accessible :name, :description
 has_many :sub_projects # !
end

Next, your belongs_to needs to be in a singular form:

class SubProject < ActiveRecord::Base
  attr_accessible :id_name, :description, :num_alloc, :project_id
  belongs_to :project # !
end

After you make these changes, you can query:

@sub_projects = SubProject.includes(:project).all
name = @sub_projects.first.project.name
...