many to many relation in Rails

many to many relation in Rails

References

Reference NO 1

http://guides.rubyonrails.org/association_basics.html

Reference NO 2

http://stackoverflow.com/questions/5120703/creating-a-many-to-many-relationship-in-rails-3

Reference NO 3

http://railscasts.com/episodes/47-two-many-to-many

Reference NO 4

http://blog.hasmanythrough.com/2007/1/15/basic-rails-association-cardinality

Reference NO 5

http://kynatro.com/blog/2012/12/16/building-a-has_many-through-model-relationship-and-form-with-cocoon/

Reference NO 6

http://toranbillups.com/blog/archive/2010/09/09/How-to-model-a-many-to-many-relationship-in-rails/

Reference NO 7

http://createdbypete.com/articles/working-with-nested-forms-and-a-many-to-many-association-in-rails-4/

Reference NO 8

http://apidock.com/rails/ActiveRecord/Associations/ClassMethods/has_many