目录一、引言二、乐观锁（一）原理（二）应用场景（三）示例代码三、悲观锁（一）原理（二）应用场景（三）示例代码四、总结一、引言
i am creating a sample movie (MVC) application. I was getting fine with Viewing and Creating a new record, but when i wrote the code to get the details of a particular record i met with the following
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