Rails has_many through migration

问题:

im doing a many to many association with my models i belive after i did this:

class Competence < ActiveRecord::Base     has_many :behaviour, through: :behaviours_rel     has_many :stabilizer, through: :stabilizers_rel end  class Behaviour < ActiveRecord::Base     belongs_to :competence end  class Stabilizer < ActiveRecord::Base     belongs_to :competence end 

i have to do a migration something like

rails generate migration behaviour:belongs_to  

but it doesnt work i dont get the logic of doing this migration with rails generate

im trying to save in a competence serveral behaviours so a one to many rel is not enought

btw i dont want to explicitly do with sql the table so is there a way to do this migration in rails?

回答1:

$ rails g model behaviours_rel competence_id:integer behaviour_id:integer  $ rails g model stabilizers_rel competence_id:integer stabilizer_id:integer  $ bundle exec rake db:migrate 

See: http://www.codequizzes.com/learn-rails/many-to-many-relationships

文章来源: Rails has_many through migration