Hi
I’m trying to create a many to many relationship between two models.
A User can be associated with many Incidents and vice versa.
class User < ActiveRecord::Base
include ActiveModel::ForbiddenAttributesProtection
has_many :incident_participants, foreign_key: “participant_id”
has_many :participated_incidents, through: :incident_participants
end
class Incident < ActiveRecord::Base
include ActiveModel::ForbiddenAttributesProtection
has_many :incident_participants, foreign_key: “participated_incident_id”
has_many :participants, through: :incident_participants
end
The join table:
class IncidentParticipant < ActiveRecord::Base
include ActiveModel::ForbiddenAttributesProtection
t.belongs_to :participant, class_name: “User”
t.belongs_to :participated_incident, class_name: “Incident”
end
Table for IncidentParticipants
create_table “incident_participants”, :force => true do |t|
t.integer “participant_id”
t.integer “participated_incident_id”
t.datetime “created_at”, :null => false
t.datetime “updated_at”, :null => false
end
So, why doesn’t rails get this relationship? When I try to do @incident.participants in my view I get this error:
“Could not find the source association(s) :participant or :participants in model IncidentParticipant. Try ‘has_many :participants, :through => :incident_participants, :source => ’. Is it one of ?”
Any ideas?