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PO@ModelAttribute and BindingResult behavior
 

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  1. PO@ModelAttribute and BindingResult behavior
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    <p>I have created two classes A and B. Class A has a method calculate </p> <pre><code>@RequestMapping(method = RequestMethod.POST) public String calculate( HttpServletRequest request, PlanVO planVO, BindingResult result, Map&lt;String, Object&gt; model) throws ParserConfigurationException, SAXException, IOException { validator.validate(planVO, result); if (result.hasErrors()) { model.put(PLAN_VO, planVO); return "test"; } </code></pre> <p>Class B also has the same method with same parameters as shown below</p> <pre><code>@RequestMapping(method = RequestMethod.POST) public String calculate( HttpServletRequest request, PlanVO planVO, BindingResult result, Map&lt;String, Object&gt; model) throws ParserConfigurationException, SAXException, IOException { validator.validate(planVO, result); if (result.hasErrors()) { model.put(PLAN_VO, planVO); return "test"; } </code></pre> <p>When I am running the code, class A validates the inputs and test.jsp is opened. On test.jsp errors are being displayed using <code>&lt;spring:errors path="*"/&gt;</code>. </p> <p>If i do the same for class B, it validates the input populate the BindingResult object and response goes to test.jsp. but I am not able to see the errors.</p> <p>Also if I update the method signature in class B as <code>@modelAttribute("planVO") PlanVO planVO,</code> it starts working as shown below.</p> <pre><code>@RequestMapping(method = RequestMethod.POST) public String calculate( HttpServletRequest request, @ModelAttribute("planVO") PlanVO planVO, BindingResult result, Map&lt;String, Object&gt; model) throws ParserConfigurationException, SAXException, IOException { validator.validate(planVO, result); if (result.hasErrors()) { model.put(PLAN_VO, planVO); return "test"; } </code></pre> <p>Now I want to ask why class A is not asking for this @ModelAttribute or why class B is asking for this?</p> <p>Thanks in advance.</p>
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    1. PTQuestion
    1. USRitesh
    1. USRitesh
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    1. COplease share the code of class B too
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      1. PO@ModelAttribute and BindingResult behavior
      1. USBassem Reda Zohdy
    2. COwhere is the PLAN_VO constant defined? is it global or per controller?
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      1. PO@ModelAttribute and BindingResult behavior
      1. USmarco.eig
    3. COyes, I am just adding @ModelAttribute in the method signature and it starts working...No change...
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      1. PO@ModelAttribute and BindingResult behavior
      1. USRitesh
 

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