class AddResponseThresholdReachedAtToPetition < ActiveRecord::Migration - AddResponseThresholdReachedAtToPetition has no descriptive comment
def change
change_table :petitions do |t| - AddResponseThresholdReachedAtToPetition#change has the variable name 't'
t.datetime :response_threshold_reached_at -
t.index :response_threshold_reached_at
end
end
end