Rails: complex HABTM relationship with 3 keys?

Has_many :through allows you use to use a proper join model, instead of an implied on like habtm You would make a whole class called something like MeetingAttendance where you would store the meeting and who attended. Then you can put whatever attributes on the model you want, including position Then simply Person has_many :meeting_attendances Person has_many :meetings, :through => :meeting_attendances Meeting has_many :meeting_attendances Meeting has_many :people, :through => :meeting_attendances and class MeetingAttendance.

Has_many :through allows you use to use a proper join model, instead of an implied on like habtm. You would make a whole class called something like MeetingAttendance, where you would store the meeting and who attended. Then you can put whatever attributes on the model you want, including position.

Then simply Person has_many :meeting_attendances Person has_many :meetings, :through => :meeting_attendances Meeting has_many :meeting_attendances Meeting has_many :people, :through => :meeting_attendances and class MeetingAttendance.

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