Hi!
I have the next model with the follow associations:
class XmlGen < ActiveRecord::Base set_primary_key "pk" belongs_to :serie, :foreign_key => "series_fk"
class Serie < ActiveRecord::Base set_primary_key "pk" belongs_to :study, #Relaciones entre las clases Study y Series. A study has many series. :foreign_key => "study_fk" has_many :xml_genes
I did the follow query:
@instances = Instance.find(:all, :include => [:serie, {:serie=>:study}])
but the query is so slow. I want to try do the query manually, with the option :joins. How do I do this query, exactly, the parameter :joins?
Thanks in advance!