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educoder/app/services/ecs/create_course_achievement_m...

66 lines
2.5 KiB

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