@ModelAttribute detached object binding from <form:form> tag has a problem [SPR-9354]

[spring-projects-issues]

Bilguun Bayarmagnai opened SPR-9354 and commented

After migrating to spring 3.1.0 from spring 3.0.5 hibernate save method is encountering problem with detached object - when trying to save new object with saveOrUpdate(Object obj) method where obj has no id.

Class A has Set of Class B. when trying to save new instance of class B from <form:form modelAttribute="b"> and via @ModelAttribute("b") it's overriding all the previous set of b's (Set<B>) from class A. Unit testing has no issues, so it could be webmvc issue. It used work perfectly fine with 3.0.5

http://forum.springsource.org/showthread.php?125940 refer to this forum thread for detailed information.

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Affects: 3.1.1

Reference URL: http://forum.springsource.org/showthread.php?125940

[spring-projects-issues]

Bilguun Bayarmagnai commented

I figured out the problem.
The new feature binding @PathVariable to @ModelAttribute got me confused. So I guess I have close this issue but I can't find?

[spring-projects-issues]

Rossen Stoyanchev commented

I'll do that and would you mind adding a small amount of detail for future reference and for our benefit?