Merge branch 'standalone_develop' into pre_trustie_server

app/models/issue_tag.rb

@@ -28,6 +28,8 @@ class IssueTag < ApplicationRecord
   belongs_to :project, optional: true, counter_cache: true
   belongs_to :user, optional: true
 
+  validates :name, uniqueness: { message: "已存在" }
+
   def self.init_data(project_id)
     data = [
       ["缺陷", "表示存在意外问题或错误", "#d92d4c"],