Rails sequence column on Model

Rails sequence column on Model

References

Reference NO 1

http://stackoverflow.com/questions/15204760/rails-sequence-column-on-model

Reference NO 2

http://stackoverflow.com/questions/952274/is-there-a-way-to-control-column-order-in-activerecord-migrations

Reference NO 3

http://stackoverflow.com/questions/5296290/notices-for-sequence-after-running-migration-in-rails-on-postgresql-application

Reference NO 4

http://matthewhutchinson.net/2010/9/22/rails-3-ambiguous-column-name-and-multiple-order-scopes

Reference NO 5

http://www.garbageburrito.com/blog/entry/447/

Reference NO 6

http://apidock.com/rails/ActiveRecord/Migration

Reference NO 7

https://github.com/sferik/rails_admin/wiki/Railsadmin-DSL

Reference NO 8

http://www.packtpub.com/article/working-with-rails-activerecord-migrations-models-scaffolding-and-database-completion