init project

app/models/live_link.rb

@@ -0,0 +1,21 @@
+class LiveLink < ApplicationRecord
+  belongs_to :course
+  belongs_to :user
+
+  has_many :tidings, as: :container, dependent: :destroy
+
+  # validates :url, format: { with: CustomRegexp::URL, message: "必须为网址超链接" }
+  validates :description, length: { maximum: 100, too_long: "不能超过100个字符" }
+  validates :course_name, presence: true
+  validates :platform, presence: true
+  # validates :live_time, presence: true
+  validates :duration, numericality: { only_integer: true, greater_than: 0}, allow_blank: true
+
+  def op_auth?
+    user == User.current || User.current.admin_or_business?
+  end
+
+  def delete_auth?
+    user == User.current || User.current.admin?
+  end
+end