#encoding: utf-8
class GraduationTopic < ActiveRecord::Base
  include Redmine::SafeAttributes
  belongs_to :user
  belongs_to :course
  attr_accessible :user_id, :course_id, :city, :description, :name, :property, :property_two, :province, :repeat, :source, :source_unit, :status, :tea_id, :topic_type, :is_public
  safe_attributes 'city', 'description', 'name', 'property', 'property_two', 'province', 'repeat', 'source', 'source_unit', 'status', 'topic_type'
  # status 0：待选中 1：待确认 2：已确认

  belongs_to :teacher, :class_name => 'User', :foreign_key => :tea_id # 定义一个方法teacher，该方法通过tea_id来调用User表
  has_many :journals_for_messages, :as => :jour, :dependent => :destroy
  has_many :praise_tread, as: :praise_tread_object, dependent: :destroy
  has_one :praise_tread_cache, as: :object, dependent: :destroy
  has_many :student_graduation_topics, :dependent => :destroy
  has_many :course_acts, :class_name => 'CourseActivity',:as =>:course_act ,:dependent => :destroy
  after_create :act_as_course_activity

  acts_as_attachable

  def topic_type_name
    name = ""
    case topic_type
      when 1
        name = "设计"
      when 2
        name = "论文"
      when 3
        name = "创作"
    end
    name
  end

  def source_name
    name = ""
    case source
      when 1
        name = "生产/社会实际"
      when 2
        name = "结合科研"
      when 3
        name = "其它"
    end
    name
  end

  def property_name
    name = ""
    case property
      when 1
        name = "真题"
      when 2
        name = "模拟题"
    end
    name
  end

  def property_two_name
    name = ""
    case property_two
      when 1
        name = "纵向课题"
      when 2
        name = "横向课题"
      when 3
        name = "自选"
    end
    name
  end

  def repeat_name
    name = ""
    case repeat
      when 1
        name = "新题"
      when 2
        name = "往届题，有新要求"
      when 3
        name = "往届题，无新要求"
    end
    name
  end

  #课程动态公共表记录
  def act_as_course_activity
    if self.course
      if self.course_acts.size == 0
        self.course_acts << CourseActivity.new(:user_id => self.user_id,:course_id => self.course_id)
      end
    end
  end
end