How to drop columns using Rails migration

Question

What's the syntax for dropping a database table column through a Rails migration?

Answer 1

remove_column :table_name, :column_name

(From the docs.)

Answer 2

remove_column :table_name, :column_name

For instance:

remove_column :users, :hobby

would remove the hobby field from the users table.

Dizzy.co.uk has a really helpful migration cheatsheet.

http://dizzy.co.uk/ruby_on_rails/cheatsheets/rails-migrations

Answer 3

Run this ruby script/generate migration RemoveFieldNameFromTableName field_name:datatype