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66 lines
2.5 KiB
66 lines
2.5 KiB
6 years ago
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class Ecs::CreateCourseAchievementMethodsService < ApplicationService
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include AcceptsNestedAttributesHelper
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attr_reader :course_target, :params
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def initialize(course_target, params)
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@course_target = course_target
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@params = params
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end
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def call
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Ecs::CreateCourseAchievementMethodsForm.new(
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ec_course: course_target.ec_course,
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course_achievement_methods: params[:course_achievement_methods]
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).validate!
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accepts_attributes = build_accepts_nested_attributes(
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course_target, course_target.ec_course_achievement_methods,
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params[:course_achievement_methods],
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&method(:deal_course_achievement_method_attribute!)
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)
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course_target.assign_attributes(ec_course_achievement_methods_attributes: accepts_attributes)
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course_target.save!
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course_target
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end
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private
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def deal_course_achievement_method_attribute!(item)
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# 创建新的评价方法时，全部为新建
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if item[:id].blank? || course_target.ec_course_achievement_methods.find_by(id: item[:id]).blank?
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item[:ec_achievement_evaluation_relates_attributes] =
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Array(*item[:course_evaluation_subitem_ids]).uniq.map do |subitem_id|
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{ ec_course_evaluation_subitem_id: subitem_id.to_i }
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end
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return
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end
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achievement_method = course_target.ec_course_achievement_methods.find_by(id: item[:id])
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relates = achievement_method.ec_achievement_evaluation_relates
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# 获取传入的 subitem id数组和已存在的 subitem id数组
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old_subitem_ids = relates.map(&:ec_course_evaluation_subitem_id).uniq
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new_subitem_ids = Array(*item[:course_evaluation_subitem_ids]).map(&:to_i).uniq
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# 分别得到需要移除的 subitem ID数组和需要创建的 subitem ID数组
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destroy_subitem_ids = old_subitem_ids - new_subitem_ids
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create_subitem_ids = new_subitem_ids - old_subitem_ids
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# 生成需要创建关系的 subitem id 数据
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create_attributes = create_subitem_ids.map { |item_id| { ec_course_evaluation_subitem_id: item_id } }
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# 处理需要更新或者删除的记录
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exists_attributes = relates.map do |relate|
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if destroy_subitem_ids.include?(relate.ec_course_evaluation_subitem_id)
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{ id: relate.id, _destroy: true }
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else
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relate.as_json(only: %i[id ec_course_evaluation_subitem_id ec_course_achievement_method_id])
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end
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end
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# 相加得到accepts_nested_attributes
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item[:ec_achievement_evaluation_relates_attributes] = create_attributes + exists_attributes
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end
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end
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