reset_column_information()
Instance Public methods
Resets all the cached information about columns, which will cause them to
be reloaded on the next request.
The most common usage pattern for this method is probably in a migration,
when just after creating a table you want to populate it with some default
values, eg:
class CreateJobLevels < ActiveRecord::Migration
def up
create_table :job_levels do |t|
t.integer :id
t.string :name
t.timestamps
end