调整

app/controllers/graduation_tasks_controller.rb

@@ -457,6 +457,8 @@ class GraduationTasksController < ApplicationController
 
             @task.comment_time = @task.cross_comment ? params[:comment_time] : nil
 
+            @task.comment_status = 2 if @task.cross_comment && @task.comment_status == 0
+
             # unless @task.cross_comment
             #   @task.graduation_work_comment_assignations.destroy_all
             # end

db/migrate/20190917024120_migrate_graduation_task_comment_status.rb

@@ -0,0 +1,5 @@
+class MigrateGraduationTaskCommentStatus < ActiveRecord::Migration[5.2]
+  def change
+    GraduationTask.where(cross_comment: true, comment_status: 0).update_all(comment_status: 2)
+  end
+end