引流页面报500

app/controllers/welcome_controller.rb

@@ -42,7 +42,7 @@ class WelcomeController < ApplicationController
 
   # 运营引流个人数据展示
   def user_agents
-    @user_agents = UserAgent.find_by_key(params[:edu])
+    @user_agents = UserAgent.where(key: params[:edu])
     @agents_count = @user_agents.count
     limit = 20
     @agents_pages = Paginator.new @agents_count, limit, params['page'] || 1