I am using rails 3.1 and ruby 1.9.3,Now i want to use uuid concept in rails 3 for existing data
so I did like :-
create_table :posts, :id => false do |t|
t.string :uuid, :limit => 36, :primary => true
# old rails versions
self.id = UUIDTools::UUID.random_create.to_s
This is working for new data,now i want to migrate existing data with relation.for uuid they are using datatype as string,in postgresql the data type used for primary_key and foreign key is integer ,so if i am trying to change foreign key integer to string it is throwing error. Can someone please tell me some example,how to do this.