Ruby on Rails: adding columns to existing database

Question

I\'m getting an error:

SQLite3::SQLException: no such column: ideas.list_id: 
SELECT \"ideas\".* FROM \"ideas\"  
WHERE \"ideas\".\"list_id\" = 2

Answer 1

You should not add new rows to old migrations. Migration is a step of building database. And number of last executed migration is stored in schema, and it will not be run or redone if you use will use rake db:migrate. If you run the migration with creating the table before, then you should create new migration where you may use add_column method.