has one - Rails has_one with join table -

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in app there athletes... athletes can have many sports.

athlete:

has_many :sports, :through => :user_sports has_one :primary_sport, conditions: ["user_sports.primary = ?", true], class_name: "sport" has_many :user_sports

usersport:

class usersport < activerecord::base   attr_accessible :athlete_id, :sport_id, :primary    belongs_to :athlete   belongs_to :sport end

i trying able pull primary_sport sport object instead of user_sport object.

since pull sports objects :through user_sports, should pull primary_sport object :through user_sports well.

has_one :primary_sport, :through => :user_sports, conditions: ["user_sports.primary = ?", true], class_name: "sport"

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