ZK8.5 Bean Validation

Question

asked 2018-02-26 22:55:06 +0800

Hi,

I'm using ZK8 and I'd like to add some bean validation to my form:

I've coded this:

Validator __validator = Validation.buildDefaultValidatorFactory().getValidator();
        Set<ConstraintViolation<Person>> violations = __validator.validate(person);
        List<WrongValueException> exceptions = new ArrayList<WrongValueException>();

        for (ConstraintViolation<Pessoa> violation : violations) {
            System.out.println(violation.getPropertyPath());
            exceptions.add(new WrongValueException(violation.getMessage()));
        }

        if (exceptions.size() > 0) {
            throw new WrongValuesException(exceptions.toArray(new WrongValueException[0]));
        }`

The validation itself is working, I can check the validation messages, pointing some property cannot be null or blank.

My question is: how could I pick up every message and show it on my zul or point that message to a specific component on the page?

I have a form and a button, so when I click it, a method is invoked and inside it there is the code above.

Since I'm using ZK8, this example doesn't seem a good idea because those classes are now deprecated.

Accepted Answer

answered 2018-02-28 02:19:07 +0800

psinalberth
52 ● 6

Thanks! It worked! Now, could you tell me what am I doing wrong? I'm testing formBeanValidator using ZKEval archetype, the validation is working but even if I fill some property, the validation message is still appearing.

<div class="section" viewModel="@id('vm') @init('br.ps.teste.viewmodel.PersonViewModel')" validationMessages="@id('vmsgs')">
        <button sclass="button is-info" label="Save" onClick="@command('save')" />

        <div class="container" form="@id('fx') @load(vm.person) @save(vm.person, after='save') @validator('formBeanValidator', prefix='p_')">

            <div class="column is-8 is-offset-2">
                <div class="field">
                    <label sclass="label" value="Name" />
                    <div class="control">
                      <textbox sclass="@load(not empty vmsgs['p_name'] ? 'input is-danger': 'input')" value="@bind(fx.name)"/>
                      <label sclass="help is-danger" value="@load(vmsgs['p_name'])" />
                    </div>
                </div>
            </div>

            <div class="column is-8 is-offset-2">
                <div class="field">
                    <label sclass="label" value="Address" />
                    <div class="control">
                      <textbox sclass="@load(not empty vmsgs['p_address'] ? 'input is-danger': 'input')" value="@bind(fx.address)"/>
                      <label sclass="help is-danger" value="@load(vmsgs['p_address'])" />
                    </div>
                </div>
            </div>

            <div class="column is-8 is-offset-2">
                <div class="columns">

                    <div class="column is-6">
                        <div class="field">
                            <label sclass="label" value="Age" />
                            <div class="control">
                             <intbox sclass="@load(not empty vmsgs['p_age'] ? 'input is-danger': 'input')" value="@bind(fx.age)" />
                             <label sclass="help is-danger" value="@load(vmsgs['p_age'])" />
                            </div>
                        </div>
                    </div>

                    <div class="column is-6">
                        <div class="field">
                            <label sclass="label" value="Weight" />
                            <div class="control">
                              <decimalbox sclass="@load(not empty vmsgs['p_weight'] ? 'input is-danger': 'input')" value="@bind(fx.weight)" />
                              <label sclass="help is-danger" value="@load(vmsgs['p_weight'])" />
                            </div>
                        </div>
                    </div>

                </div>
            </div>
        </div>
    </div>

I took the markup from MVVM Book

<window id="win" apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init(foo.MyViewModel)"
    validationMessages="@id('vmsgs')">
    <grid width="600px" form="@id('fx') @load(vm.user) @save(vm.user, after='save')
        @validator('formBeanValidator', prefix='p_')">
        <textbox value="@bind(fx.firstName)"/>
        <label value="@load(vmsgs['p_firstName'])"/>
    </grid>
<!--more components-->
</window>

It looks like the object going to validation is always null. I have a button which is intented to invoke a method to create a new instance of Person, so I click it and the object is created. Even when I don't, the validation process is invoked.

I'll check it out tomorrow
chillworld ( 2018-02-28 03:16:55 +0800 )edit
is it possible to create a fiddle with that code? http://zkfiddle.org/ just give it a name when it works and save it. The link will change and post that link here.
chillworld ( 2018-03-01 14:12:40 +0800 )edit
Hi. Here it is the fiddle. Since I'm using JSR Validation, it won't work properly because the imports cannot be found, but this is the code I'm testing with FormBeanValidator from ZK 8.5 EE-Eval archetype.
http://zkfiddle.org/sample/8jsig4/9-formBeanValidator
psinalberth ( 2018-03-01 19:02:29 +0800 )edit
thx fro the fiddle. The reason why it doesn't work is because you have no reference to : vmsgs['p_addres']. You create a WrongValueException with an error message without saying where it belongs. Normally for WrongValueException, you need a component as reference.
chillworld ( 2018-03-01 19:31:28 +0800 )edit
otherwise you use AbstractValidator and put addInvalidMessage with the context. The context provides the location.
chillworld ( 2018-03-01 19:32:41 +0800 )edit

Answer 2

answered 2018-02-27 03:58:06 +0800

psinalberth
52 ● 6

Thanks @chillworld for replying me. It turns that I don't have a component. I'm using MVVM and in my ViewModel there is only a person object, so there is no references to any view element. I'd need something like vmsgs approach with a validator like 'formBeanValidator', but it is available only for EE version:

<div class="column is-8 is-offset-2">
                <div class="field">
                    <label sclass="label" value="Name" />
                    <div class="control">
                      <textbox sclass="input" value="@bind(vm.person.name) @validator('beanValidator', key='name')"/>
                      <label sclass="help is-danger" value="@load(vmsgs['name'])" />
                    </div>
                </div>
            </div>

By using beanValidator it works but when I have many properties to bind, it will be a difficult task.

As I said, the example on my previous post uses BindingValidateEvent to get the components, values and binding but all those classes are now deprecated. Is there a similar approach to do that using MVVM?

Answer 3

answered 2018-02-27 14:23:21 +0800

chillworld

5367 ● 4 ● 9
https://github.com/chillw...

This still runs under 8.5 in the fiddle :

http://zkfiddle.org/sample/2b78rsn/2-MVVM-sclass-for-validation-error#source-1

Chill.

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ZK8.5 Bean Validation

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