# TODO:: change table column :weigths => :weight
class EcCourseTarget < ApplicationRecord
  belongs_to :ec_course

  has_many :ec_graduation_subitem_course_targets, dependent: :destroy
  has_many :ec_graduation_subitems, through: :ec_graduation_subitem_course_targets
  has_many :ec_student_score_targets
  has_many :ec_course_achievement_methods, dependent: :destroy
  has_many :ec_achievement_evaluation_relates, dependent: :destroy

  validates :content, presence: true
  validates :standard_grade, numericality: { only_integer: true, greater_than: 0 }
  validates :weight, presence: true, numericality: { less_than_or_equal_to: 1, greater_than_or_equal_to: 0 }

  accepts_nested_attributes_for :ec_graduation_subitem_course_targets, allow_destroy: true
  accepts_nested_attributes_for :ec_course_achievement_methods, allow_destroy: true

  number_display_methods :weight
end