How can i remove a column from table using rails console
It is easily possible to remove a column using rails migration.
class SomeClass < ActiveRecord::Migration
def self.up
remove_column :table_name, :column_name
end
end
I want to know if there is any way to remove a column from table using console.
You can run the codes in up
method directly in rails console
:
>> ActiveRecord::Migration.remove_column :table_name, :column_name
If you already have a migration file such as "db/migrate/20130418125100_remove_foo.rb
", you can do this:
>> require "db/migrate/20130418125100_remove_foo.rb"
>> RemoveFoo.up
If you just want to do rake db:migrate
, try this:
>> ActiveRecord::Migrator.migrate "db/migrate"