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class ExerciseChoice < ApplicationRecord
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belongs_to :exercise_question
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has_many :exercise_answers
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has_many :exercise_standard_answers
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scope :find_choice_custom, lambda {|k,v| where("#{k} = ?",v)} #根据传入的参数查找问题
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scope :left_choice_choose, lambda {|k,v| where("#{k} > ?",v)} #根据传入的参数查找问题
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after_destroy :destroy_choices_relations
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def destroy_choices_relations
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exercise_answers.destroy_all
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exercise_standard_answers.destroy_all
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end
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end
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