修复

app/controllers/admins/message_templates_controller.rb

@@ -11,8 +11,8 @@ class Admins::MessageTemplatesController < Admins::BaseController
   end
 
   def create 
-    @message_template = MessageTemplate::CustomTip.new(message_template_params)
-
+    @message_template = MessageTemplate::CustomTip.new
+    @message_template.attributes = message_template_params
     if @message_template.save!
       redirect_to admins_message_templates_path 
       flash[:success] = "创建消息模板成功"