demo_app/my_platform/db/migrate/20150325105848_change_profile_field_value_to_text.your_platform.rb
# This migration comes from your_platform (originally 20120508152233)
class ChangeProfileFieldValueToText < ActiveRecord::Migration[4.2]
def change
change_table :profile_fields do |t|
t.change :value, :text
end
end
end