How do you order a tournaments games by the name of each games field in Rails?

Question

I have the following models:

class Tournament < ApplicationRecord
  has_many :games, inverse_of: :tournament, dependent: :destroy

  accepts_nested_attributes_for :games, allow_destroy: true
end

class Game < ApplicationRecord
  belongs_to :tournament
  belongs_to :field, optional: true
end

class Field < ApplicationRecord
  has_many :games, dependent: :destroy
end

I would like to order the games based on the name of the field that the game is played on, but in the games I only have access to field_id , not field.name .

t.games.order('field.name') and t.games.order('fields.name') don't work. They give a ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR: missing FROM-clause entry for table "fields") error.

Answer 1

tournament.games.left_joins(:field).order('fields.name')可以解决问题。