What is RedirectAttributes?
A RedirectAttributes model is empty when the method is called and is never used unless the method returns a redirect view name or a RedirectView. After the redirect, flash attributes are automatically added to the model of the controller that serves the target URL.
What is ModelAndView?
ModelAndView is a holder for both Model and View in the web MVC framework. These two classes are distinct; ModelAndView merely holds both to make it possible for a controller to return both model and view in a single return value. The view is resolved by a ViewResolver object; the model is data stored in a Map .
What are flash attributes?
Flash attributes provide a way for one request to store attributes intended for use in another. Flash attributes are saved temporarily (typically in the session) before the redirect to be made available to the request after the redirect and removed immediately. In order to do this, Flash feature uses two collections.
Can we create object of ModelAndView?
Constructor Summary Create a new ModelAndView given a view name and a model. Create a new ModelAndView given a view name, model, and HTTP status. Convenient constructor to take a single model object. Convenient constructor when there is no model data to expose.
What is the use of redirectattributes?
It is a preferred way to pass attributes to redirect target. Using Model attributes for passing redirection data is not always desirable as it may conflict some attributes used for rendering purposes. The following example demonstrates the use of RedirectAttributes
Can I use model attributes for passing redirection data?
Using Model attributes for passing redirection data is not always desirable as it may conflict some attributes used for rendering purposes. The following example demonstrates the use of RedirectAttributes
Should redirectview attributes be passed to the controller?
Instead the controller method should declare an attribute of type RedirectAttributes or if it doesn’t do so no attributes should be passed on to RedirectView. For backwards compatibility reasons this flag is set to false by default. We typically set RequestMappingHandlerAdapter#ignoreDefaultModelOnRedirect flag in our @Configuration class:
How to disable default usage of model attributes during redirection?
Disable default usage of Model attributes during redirection. The RequestMappingHandlerAdapter provides a flag called “ignoreDefaultModelOnRedirect” that can be used to indicate the content of the default Model should never be used if a controller method redirects.