20151209040505_change_text_response_answer_answer_text_column_type.rb

class ChangeTextResponseAnswerAnswerTextColumnType < ActiveRecord::Migration
  def up
    # set column to not nullable and default to empty string
    change_column_default :course_assessment_answer_text_responses, :answer_text, ''
    change_column_null :course_assessment_answer_text_responses, :answer_text, false, ''
  end

  def down
    change_column_default :course_assessment_answer_text_responses, :answer_text, nil
    change_column_null :course_assessment_answer_text_responses, :answer_text, true
  end
end