Question

I try to build a soccer manager game using rails and I’m stuck with the rails association.

team table
  ...

history table
  team_id
  saison_id

saison table
  league_id
  league table
  ...

I want to find all the team for one league.

class History < ActiveRecord::Base
  belongs_to :saison
  belongs_to :team
end

class Saison < ActiveRecord::Base
  has_many :histories
  has_many :teams, :through => :histories
  belongs_to :league
end

class League < ActiveRecord::Base
  has_many :saisons 
end

class Team < ActiveRecord::Bases
  has_many :histories
  has_many :saisons, :through => :histories
end

I want to do something like (in the show method of the league controller) :

@team = Team.find(:all, :include => [:saisons => :histories, :leagues => :saisons], 
          :conditions => ["leagues.id = ?", params[:id]])

but it does not work.

The SQL query :

SELECT Team.* 
FROM   Team, Saison, History, League  
WHERE  History.Team_ID = Team.ID AND 
       History.Saison_ID = Saison.ID AND 
       Saison.League_ID = League.ID

this query return all the team for one saison…but I do not achieve to make it work for league

@division = Team.find(:all, :include => [:saisons => :histories],
                                :conditions =>["saisons.id =?",params[:id]])

Answer 1

In the league controller, in the show method, I try something like

 @team = Equipe.find(:all, :include => [:saisons => :history],
                                :conditions =>["saisons.league_id =?",params[:id]])

I would include the league in the find statement to have all its attributes (name for instance) in the same result tab.

I know I can those information about league in another query, but it is not the best way to do it.