これが私の3つのモデル/テーブルです
class Swimming::Classschedule < ActiveRecord::Base
belongs_to :swimming_classtimes ,:class_name=>'Swimming::Classtime',:foreign_key => "classtime_id"
attr_accessible :id,:coach_id, :level_id, :note, :classtime_id
end
class Swimming::Classtime < ActiveRecord::Base
has_many :swimming_classschedules,:class_name=>'Swimming::Classschedule'
belongs_to :swimming_timeblocks ,:class_name=>'Swimming::Timeblock',:foreign_key => "timeblock_id"
attr_accessible :date, :end, :start,:timeblock_id,:id
end
class Swimming::Timeblock < ActiveRecord::Base
has_many :swimming_classtimes,:class_name=>'Swimming::Classtime'
attr_accessible :name,:id
end
内部結合したい
select * from swimming_classschedules as c inner join swimming_classtimes as t on c.classtime_id = t.id inner join swimming_timeblocks as b on c.timeblock_id = b.id where c.date >= "2013-06-01" and c.date <= "2013-07-01" and c.timeblock_id = 5
そして、1 つのテーブル (swiming_classschedules など) からだけでなく、これら 3 つのテーブルからすべてのフィールドを返したいと思います。このページhttp://guides.rubyonrails.org/association_basics.htmlを読みましたが、Rails モデルと内部結合する方法がまだ明確ではありません
アップデート
最初の答えを試した
Swimming::Classschedule.joins(:swimming_classtimes).joins(:swimming_timeblocks).select("swimming_classtimes.*,swimming_timeblocks.*,swimming_classschedules.*").where("swimming_classtimes.date >= '2013-06-01' and swimming_classtimes.date <= '2013-06-08' ")
このエラーメッセージが表示されました
ActiveRecord::ConfigurationError: Association named 'swimming_timeblocks' was not found; perhaps you misspelled it?
助けてくれてありがとう