CODEWITHSUNDEEP
javaspring-mvcweb-applications
Jae Carr
Jae Carr

Reputation: 1225

Getting BindingResults to show me the field associated with an error

I'm trying to write an integration test for a Spring WebApp I'm working on. At one point during the process I'm pulling the list of errors out of a BindingResult using this code:

    BindingResult checkMe = (BindingResult)mv.getModelMap().get("org.springframework.validation.BindingResult.module");
    assertEquals(1, check.getErrorCount());

    //Check to make sure it is the right field that errored, and had the right error.
    if(check.hasErrors()){

        List<ObjectError> errors = checkMe.getAllErrors();
        assertEquals(1, errors.size());
        ObjectError tester = errors.get(0); 
        assertEquals("Range", tester.getCode());
        assertEquals("must be between 0 and 365", tester.getDefaultMessage());          

    }

I want to add a line that will assert that the field that is throwing the error is in fact "daysToComplete". I know the information is in there somewhere because checkMe.getAllErrors().toString() returns:

[Field error in object 'module' on field 'daysToComplete': rejected value [1000]; codes [Range.module.daysToComplete,Range.daysToComplete,Range.int,Range]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [module.daysToComplete,daysToComplete]; arguments []; default message [daysToComplete],365,0]; default message [must be between 0 and 365]]

How do I just get the field itself? I've looked through the documentation and asked google but nothing seems to come up...

Upvotes: 4

Views: 10065

Answers (2)

jefmaus
jefmaus

Reputation: 119

public String nameMethod(@ModelAttribute Client client, BindingResult result) {
   for (ObjectError error : result.getAllErrors()) { // 1.
       String fieldErrors = ((FieldError) error).getField(); // 2.
       System.out.println(fieldErrors);
   }
}
  1. Get all the errors obtained from BindingResult
  2. Get the name of the field that produced the binding error.

Now it is possible to return the error to the user and tell him which field he should verify.

Greetings.

Upvotes: 5

user4903
user4903

Reputation:

Your ObjectError is likely an instance of FieldError, which extends ObjectError. The FieldError should have a getField() method on it, which will tell you the name. Try the following (untested):

if (check.hasErrors()){

    List<ObjectError> errors = checkMe.getAllErrors();
    assertEquals(1, errors.size());

    FieldError tester = null;
    if (errors.get(0) instanceof FieldError) {
        tester = errors.get(0);
    } else {
        assertFail("Wrong binding result error type.");
    }

    assertEquals("daysToComplete", tester.getField());
    assertEquals("Range", tester.getCode());
    assertEquals("must be between 0 and 365", tester.getDefaultMessage());          
}

Upvotes: 7

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