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class ChangeExercise1930Position < ActiveRecord::Migration[5.2]
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def change
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exs = Exercise.all.includes(:exercise_questions)
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exs.each do |ex|
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ex_questions = ex&.exercise_questions&.select(:id,:question_number,:exercise_id)&.order("question_number ASC") #试卷的位置迁移
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if ex_questions.exists?
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ex_questions.each_with_index do |q,index|
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puts index
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q_num = index + 1
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if q.question_number.to_i != q_num
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q.update_attributes(question_number: q_num)
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end
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end
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end
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ex_q_bank = ex&.exercise_bank&.exercise_bank_questions&.select(:id,:question_number,:exercise_bank_id,:shixun_id)&.order("question_number ASC") #试卷的习题库位置迁移
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if ex_q_bank.exists?
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ex_q_bank.each_with_index do |q,index|
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puts index
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q_num_1 = index + 1
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if q.question_number.to_i != q_num_1
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q.update_attributes(question_number: q_num_1)
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end
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end
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end
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end
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end
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end
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Reference in new issue