Rails: Reordering Columns

Sometimes it is necessary to reorder columns so that data is presented, by default, in a more meaningful way e.g. the 'key' columns probably should appear in the beginning, followed by other columns that do not allow a Null value, followed by columns that can take in Null values (basically, are not that important)

http://stackoverflow.com/questions/18899011/rails-4-migration-how-to-reorder-columns