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class AddOldExerciseTiankongChoiceId < ActiveRecord :: Migration [ 5 . 2 ]
def up
#类型为3 的问题答案及标准答案更新exercise_choice_id 为1，
exercise_question_ids = ExerciseQuestion . where ( " question_type = 3 " ) . pluck ( :id )
ExerciseAnswer . where ( exercise_question_id : exercise_question_ids , exercise_choice_id : nil ) . update_all ( exercise_choice_id : 1 )
ExerciseStandardAnswer . where ( exercise_question_id : exercise_question_ids , exercise_choice_id : nil ) . update_all ( exercise_choice_id : 1 )
exercise_bank_question_ids = ExerciseBankQuestion . where ( " question_type =3 " ) . pluck ( :id )
ExerciseBankStandardAnswer . where ( exercise_bank_question_id : exercise_bank_question_ids ) . update_all ( exercise_bank_choice_id : 1 )
end
def down
#类型为3 的问题答案及标准答案更新exercise_choice_id 为1，
exercise_question_ids = ExerciseQuestion . where ( " question_type = 3 " ) . pluck ( :id )
ExerciseAnswer . where ( exercise_question_id : exercise_question_ids , exercise_choice_id : 1 ) . update_all ( exercise_choice_id : nil )
ExerciseStandardAnswer . where ( exercise_question_id : exercise_question_ids , exercise_choice_id : 1 ) . update_all ( exercise_choice_id : nil )
exercise_bank_question_ids = ExerciseBankQuestion . where ( " question_type =3 " ) . pluck ( :id )
ExerciseBankStandardAnswer . where ( exercise_bank_question_id : exercise_bank_question_ids ) . update_all ( exercise_bank_choice_id : nil )
end
end
