更改：检查用户id的路由

app/controllers/api/v1/users_controller.rb

@@ -1,14 +1,13 @@
 class Api::V1::UsersController < Api::V1::BaseController 
 
+  before_action :load_observe_user, except: [:check_user_id]
+  before_action :check_auth_for_observe_user, except: [:check_user_id]
+
   def check_user_id 
-    id = params[:user_id]
-    return tip_exception(-1, "用户ID不存在") unless User.exists?(id: id)
+    return tip_exception(-1, "用户ID不存在") unless params[:user_id].present? && User.exists?(id: params[:user_id])
     render_ok
   end
 
-  before_action :load_observe_user
-  before_action :check_auth_for_observe_user
-
   def send_email_vefify_code 
     code = %W(0 1 2 3 4 5 6 7 8 9)
     verification_code = code.sample(6).join