CODEWITHSUNDEEP
javaspringjspspring-mvcspring-form
yelliver
yelliver

Reputation: 5926

Spring form input value get lost when manually add FieldError into bindingResult

I have a web controller in Spring MVC:

@RequestMapping("/")
public String create(@Valid @ModelAttribute Device device, BindingResult bindingResult) {
    return getDefaultView();
}

jsp view:

<form:form role="form" commandName="device">
    <form:input path="name" class="form-control"/>
    <form:errors path="name" cssClass="text-danger"/>
    <button type="submit">Submit</button>
</form:form>

Suppose that my Device class has only one attribute name. I want to validate it (example length >= 5)

public class DeviceDTO {
    @Size(min = 5)
    String name;
    //getter & setter..
}

After run this, I input string "abc" in name field then submit, The form will show as: enter image description here

We can see there are old value & error message. But in some cases that I want to manually validate with my own criteria (that annotation cannot handle), I remove @Size annotation and change my controller like this:

@RequestMapping("/")
public String create(@Valid @ModelAttribute Device device, BindingResult bindingResult) {
    if(device.getName().length() < 6)
        bindingResult.addError(new FieldError("device", "name", "custom error"));
    return getDefaultView();
}

But now, when I submit form with "abc" value, my custom error is shown but my old value of name field not enter image description here

But if I use directly ${device.name}, it still shows "abc" value.

Upvotes: 2

Views: 3461

Answers (1)

GUISSOUMA Issam
GUISSOUMA Issam

Reputation: 2582

Try the code below:

@RequestMapping("/")
public String create(@Valid @ModelAttribute Device device, BindingResult bindingResult) {
    if(device.getName().length() < 6)
        bindingResult.addError(new FieldError("device", "name",device.getName(), false, null, null, "custom error"));
    return getDefaultView();
}

Upvotes: 6

Related Questions