新增: 项目搜索标签关联记录复合唯一验证

app/models/project_topic_ralate.rb

@@ -19,4 +19,8 @@ class ProjectTopicRalate < ApplicationRecord
   belongs_to :project_topic, counter_cache: :projects_count
   belongs_to :project  
 
+
+  validates :project_id, uniqueness: { scope: :project_topic_id }
+
+
 end