activerecord: check first X chars of column

activerecord: check first X chars of column

References

Reference NO 1

https://github.com/rails-sqlserver/activerecord-sqlserver-adapter

Reference NO 2

http://stackoverflow.com/questions/5709887/a-proper-way-to-escape-when-building-like-queries-in-rails-3-activerecord

Reference NO 3

http://stackoverflow.com/questions/10021918/rails-3-database-column-wont-update-through-active-record

Reference NO 4

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

Reference NO 5

http://apidock.com/rails/ActiveRecord/Serialization/to_json

Reference NO 6

http://www.rubydoc.info/github/rsim/oracle-enhanced/ActiveRecord/ConnectionAdapters/OracleEnhancedAdapter

Reference NO 7

http://edgeguides.rubyonrails.org/active_record_validations.html

Reference NO 8

http://www.pradosoft.com/demos/quickstart/?page=Database.ActiveRecord