These working examples might help too.
http://jumpstart.doublenegative.com.au/jumpstart7/examples/input/programmaticvalidation
<http://jumpstart.doublenegative.com.au/jumpstart7/examples/input/programmaticvalidation>
http://jumpstart.doublenegative.com.au/jumpstart7/examples/input/validators
<http://jumpstart.doublenegative.com.au/jumpstart7/examples/input/validators>
Geoff
> On 14 Jun 2016, at 1:02 AM, sheikh hossain <shossa...@gmail.com> wrote:
>
> That's awesome !
>
> Once again Cezary you have been quick and precise. Thank you so much for
> the solution and the detail explanation with code example. It really helped.
> It worked after I renamed onValidate method.
>
> Thank you for attention to details and other suggestion.
> Much much appreciated.
>
>
>
>
> On Mon, Jun 13, 2016 at 10:56 AM, Cezary Biernacki <cezary...@gmail.com>
> wrote:
>
>> Even simpler solution is to remove your "onValidate" method and just use
>> Tapestry's "required" validator:
>>
>> "<t:textfield t:id="name" value="theZone.name"
>> t:validate="required,maxlength=50"/>
>>
>> You can customise the error message by putting an appropriate entry in your
>> message catalog (see
>>
>> http://tapestry.apache.org/forms-and-validation.html#FormsandValidation-CustomizingValidationMessages
>> ):
>>
>> name-required=You must enter a name.
>>
>> Cezary
>>
>>
>> On Mon, Jun 13, 2016 at 4:47 PM, Cezary Biernacki <cezary...@gmail.com>
>> wrote:
>>
>>> A correction, this part:
>>> void onValidateFromName(TaxZone z) {
>>> if (z.getName() == null || z.getName().trim().length()
>>> == 0) {
>>> form.recordError(nameField, "You must enter a name.");
>>> }
>>> }
>>>
>>> should be actually:
>>> void onValidateFromName(String name) {
>>> if (name == null || name.trim().length()
>>> == 0) {
>>> form.recordError(nameField, "You must enter a name.");
>>> }
>>> }
>>>
>>>
>>> On Mon, Jun 13, 2016 at 4:38 PM, Cezary Biernacki <cezary...@gmail.com>
>>> wrote:
>>>
>>>> Hi,
>>>> your "onValidate" method does not specify for which component it should
>>>> be invoked, so it is invoked for all components that trigger "validate"
>>>> event. Tapestry invokes validate for each input form control (providing
>> an
>>>> input value as the context argument) plus one for the whole form itself
>>>> with all data filled for cross-data validation. It is why observed that
>>>> your method was invoked twice. I believe that Tapestry 5.1 used to
>> trigger
>>>> separate "validateForm" event, but it was changed around Tapestry 5.3.
>>>>
>>>> You can fix this by specifying the component. It can be either the input
>>>> component (in this case you need to validate the context argument):
>>>>
>>>> void onValidateFromName(TaxZone z) {
>>>> if (z.getName() == null || z.getName().trim().length()
>>>> == 0) {
>>>> form.recordError(nameField, "You must enter a name.");
>>>> }
>>>> }
>>>>
>>>> or your form:
>>>> void onValidateFromHERE_YOUR_FORM_NAME() {
>>>> if (theZone.getName() == null || theZone.getName().trim().
>>>> length()
>>>> == 0) {
>>>> form.recordError(nameField, "You must enter a name.");
>>>> }
>>>> }
>>>>
>>>>
>>>> (replace with HERE_YOUR_FORM_NAME with actual name of your form from
>>>> .tml - t:id argument)
>>>>
>>>>
>>>>
>>>> BTW, expression "x == null || x.trim().length() == 0" can be replaced
>>>> with StringUtils.isBlank(x) from Apache Commons library, e.g:
>>>>
>>>> void onValidateFromHERE_YOUR_FORM_NAME() {
>>>> if (StringUtils.isBlank(theZone.getName())) {
>>>> form.recordError(nameField, "You must enter a name.");
>>>> }
>>>> }
>>>>
>>>> Best regards,
>>>> Cezary
>>>>
>>>>
>>>>
>>>> On Mon, Jun 13, 2016 at 4:07 PM, sheikh hossain <shossa...@gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Our application has a page which submits a form through a submit button
>>>>> and
>>>>> it goes through the page 'onValidate' and fails the validation.
>>>>>
>>>>> the .tml file has
>>>>>
>>>>> <tc:groupbox>
>>>>> <table>
>>>>> - - - - - -
>>>>> - - - - -
>>>>> <td valign="center"><tc:genbutton><input t:type="submit"
>>>>> t:id="submit" t:mixins="common/blockingClick"
>>>>> value="${message:button.save}"/></tc:genbutton></td>
>>>>>
>>>>> <td valign="center"><tc:genbutton><a t:type="actionLink"
>>>>> t:id="cancel"
>>>>>
>>>>>
>> t:mixins="common/blockingClick">${message:button.cancel}</a></tc:genbutton></td>
>>>>>
>>>>> - - - - - - - - -
>>>>> - - - - - - - -
>>>>>
>>>>> <t:label for="name"><font
>>>>> size="+0"><b>${message:name-label}</b> * </font></t:label>
>>>>>
>>>>> <td>
>>>>> <t:textfield t:id="name" value="theZone.name"
>>>>> t:validate="maxlength=50"/>
>>>>> </td>
>>>>>
>>>>>
>>>>> In our page file:
>>>>>
>>>>> @Property
>>>>> // @Persist(PersistenceConstants.FLASH) --- I tested with this
>> also.
>>>>> doesn't work.
>>>>> private TaxZone theZone;
>>>>>
>>>>>
>>>>> - - - - - -
>>>>> - - - - - -
>>>>>
>>>>> void onActivate(final Long aRowId) throws SQLException {
>>>>>
>>>>> if (theZone == null) {
>>>>> if (rowid == null || rowid == -1L) {
>>>>> theZone = new TaxZone("");
>>>>> }else{
>>>>> // get from db
>>>>> }
>>>>> - - - - -
>>>>> - - - - - -
>>>>>
>>>>> void onValidate() {
>>>>> if (theZone.getName() == null ||
>>>>> *theZone.getName().trim().length()
>>>>> == 0*) {
>>>>> form.recordError(nameField, "You must enter a name.");
>>>>> }
>>>>> }
>>>>>
>>>>> Even if we put a value into the text filed it comes back to the page
>>>>> after
>>>>> validation and shows 'You must enter a name' message.
>>>>>
>>>>> I have bebugged through the code and it seems that after submitting the
>>>>> form with a value entered into the name field the flow goes through the
>>>>> 'onActivate' and creates an empty 'theZone' and then gets validated
>> which
>>>>> creates the error message. After that only the flow populates 'theZone'
>>>>> with the value I had entered and gets validated again through the
>>>>> 'onValidate' method for the second time and get passed. But since it
>>>>> already has an error message in it's first 'onValidate' call it comes
>>>>> back
>>>>> to the page and shows the error message.
>>>>>
>>>>> I have tried with removing the code block from 'onActivate' and putting
>>>>> that into the 'setupRender' and in this case the flow throws a
>>>>> 'NullPointerException' in 'onValidate' since it couldn't find an
>> instance
>>>>> of 'theZone'.
>>>>>
>>>>> Also tried with @Persist for the 'theZone' property. That didn't work.
>>>>>
>>>>> It seems after the form submit with a value 'theZone' doesn't get
>>>>> initialized with the entered value. And if it's already initialized
>>>>> through
>>>>> the 'onActivate' code it doesn't get populated with the entered name
>>>>> before
>>>>> the 'onValidate' call.
>>>>>
>>>>> This code used to work in our old Tapestry 5.1.0.5. We are upgrading to
>>>>> version 5.4.0
>>>>>
>>>>> I wonder if this is related to javascript update in new Tapestry
>>>>> framework
>>>>> or I am missing something to make it work.
>>>>>
>>>>> I would appreciate any response.
>>>>>
>>>>> Thanks a lot.
>>>>>
>>>>
>>>>
>>>
>>
