init project

app/models/tiding.rb

@@ -0,0 +1,32 @@
+class Tiding < ApplicationRecord
+  belongs_to :user
+  belongs_to :trigger_user, class_name: 'User', optional: true
+  belongs_to :container, polymorphic: true, optional: true
+  belongs_to :parent_container, polymorphic: true, optional: true
+  belongs_to :belong_container, polymorphic: true, optional: true
+
+  has_many :attachments, as: :container
+
+  scope :visible, -> { where(is_delete: 0) }
+
+  def identifier
+    value = nil
+
+    value = container.try(:identifier) rescue nil
+
+    if value.blank? && parent_container_type
+      value = parent_container_type.try(:identifier) rescue nil
+    end
+
+    if value.blank? && belong_container_type
+      value = belong_container.try(:identifier) rescue nil
+    end
+
+    value
+  end
+
+  def anonymous?
+    (container_type == 'StudentWorksScore' && extra.to_i == 3) ||
+      (container_type == 'StudentWorksScoresAppeal' && parent_container_type == 'StudentWork' && tiding_type == 'System')
+  end
+end