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class AddOldExerciseTiankongChoiceId < ActiveRecord::Migration[5.2]
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def up
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#类型为3 的问题答案及标准答案更新exercise_choice_id 为1，即表示第一空
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exercise_question_ids = ExerciseQuestion.where("question_type = 3").pluck(:id)
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ExerciseAnswer.where(exercise_question_id: exercise_question_ids,exercise_choice_id: nil).update_all(exercise_choice_id:1)
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ExerciseStandardAnswer.where(exercise_question_id: exercise_question_ids,exercise_choice_id: nil).update_all(exercise_choice_id:1)
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exercise_bank_question_ids = ExerciseBankQuestion.where("question_type =3").pluck(:id)
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ExerciseBankStandardAnswer.where(exercise_bank_question_id: exercise_bank_question_ids).update_all(exercise_bank_choice_id:1)
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end
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def down
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#类型为3 的问题答案及标准答案更新exercise_choice_id 为1，即表示第一空
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exercise_question_ids = ExerciseQuestion.where("question_type = 3").pluck(:id)
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ExerciseAnswer.where(exercise_question_id: exercise_question_ids,exercise_choice_id: 1).update_all(exercise_choice_id:nil)
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ExerciseStandardAnswer.where(exercise_question_id: exercise_question_ids,exercise_choice_id: 1).update_all(exercise_choice_id:nil)
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exercise_bank_question_ids = ExerciseBankQuestion.where("question_type =3").pluck(:id)
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ExerciseBankStandardAnswer.where(exercise_bank_question_id: exercise_bank_question_ids).update_all(exercise_bank_choice_id:nil)
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end
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end
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