Rails NoMethod 调用动态属性查找时出错
我目前正在开发一个应用程序。在此应用程序中，我创建了一个 Person 模型，并使用了 Rail 的动态属性查找功能。在 Person 模型中，我有一个名为 uid 的属性，因此我调用 Person.find_by_uid（某个数值）。这在我的开发模式下运行良好，并且该应用程序完全正常运行。然而，一旦我将此应用程序部署到heroku。应用程序失败，日志抱怨 NoMethodError (# 的未定义方法`find_by_uid')：
我一直在寻找所有地方，但仍然无法找到问题。我尝试在Person模型下定义方法find_by_uid，仍然不起作用。
我想知道是否有人有类似的经历或知道如何解决这个问题？
提前非常感谢！
I am currently working on an app. In this app, I created a Person model and I was using rail's dynamic attribute find feature. In the Person model I have an attribute called uid, so I was calling Person.find_by_uid(some numerical value). This worked fine in my development mode and the app was totally functioning. However, once I deployed this app to heroku. The app failed and the log complains about NoMethodError (undefined method `find_by_uid' for #):
I have been looking all places, but still unable to track down the problem. I tried to define the method find_by_uid under the Person model, and still does not work.
I was wondering if anyone has had similar experience or knows how to solve this issue?
Thank you very much ahead of the time!
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您是否尝试在heroku（heroku rake db：migrate）中运行迁移？最能证明的是，该属性不在heroku 数据库中，因此您没有该动态方法。
Did you try running the migrations in heroku (heroku rake db:migrate)? Most provably that attribute is not in the heroku data base so you don't have that dynamic method.
我遇到了同样的问题。
heroku restart救了我。I ran into the same problem.
heroku restarthas saved me.