In a web application, you can't use transactions across multiple HTTP requests. You have no way of knowing if the user is even still there. And every edit involves at least two requests: one to get the form with the data being edited, and the second to submit the changes. You can only use a transaction later when processing the submitted form, at which point you may be clobbering someone else's edit.

In reply to Re: Re: Concurrency control in web applications by perrin
in thread Concurrency control in web applications by cbraga

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