I’ve an applicattion actually in production wich i wrote in php last
year. Now, I’m working on a new version in Ruby/Rails.
So, can someone tell me how can I generate a migration so that every
time I run it the “data” from the old db get’s copied to the new one??
Note that _I’ve already the schema, I want something that automatically
could copy the field old_id of the table DB1._my_old_table to the field
id of DB2.my_table.