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From "Engelking, Nicholas" <>
Subject RE: Required validator doesn't work
Date Fri, 14 Dec 2007 15:30:59 GMT
There is a convince validator for types that uses the backing type errors to generate validation
errors. I use it to ensure that letters aren't entered in my number fields.

The annotation is ConversionErrorFieldValidator

For example:

@ConversionErrorFieldValidator(message="Please enter only numerical values")
public void setHours(float hours) {
        this.hours = hours;

Be warned though, it works for me but may be a little buggy. See


-----Original Message-----
From: Alberto A. Flores []
Sent: December 14, 2007 9:55 AM
To: Struts Users Mailing List
Subject: Re: Required validator dosen't work

You may want to read on

The last topic "Type Conversion Error Handling".

I had the same problem. It turns out that there's no "validation"
concept of a "type" (similar to Struts1"), however Struts 2 will give
you control over type conversion problems (similar approach, but with
more control).

So, you really don't have to do much (other than formatting the message
if the default doesn't suit your needs)

Arpan Debroy wrote:
> Thank you Laurie ,
> Using 'Long' is the correct way to get 'required' validator worked.
> But now I want show error message when user will put string or character
> instead of any long value.
> What validator to use?
> On Dec 11, 2007 7:13 PM, Laurie Harper <> wrote:
>> The 'requiredstring' validator will check for both not-null and
>> not-empty, where 'required' only checks for non-null. If you're using a
>> numeric primitive type (i.e. 'long' rather than 'Long'), you can never
>> have a null value, so required can never fail. In that case, you need to
>> specify range constraints in your validation, or switch to using the
>> wrapper type instead of primitives.
>> L.
>> Arpan Debroy wrote:
>>> Yeah..I am using numbers only.The "required" validator not working for
>>> numbers also.
>>> If you want you can test it quickly.
>>> On Dec 10, 2007 11:01 PM, Jiang, Jane (NIH/NCI) [C] <
>>> wrote:
>>>> Use "required" validator only when a field contains a number.  Use
>>>> requiredstring for String based field.
>>>> -----Original Message-----
>>>> From: Arpan Debroy []
>>>> Sent: Monday, December 10, 2007 11:00 AM
>>>> To: Struts Users Mailing List
>>>> Subject: Re: Required validator dosen't work
>>>> Yeah,
>>>> I am using following -
>>>> <interceptor-ref name="validationWorkflowStack"/>
>>>> Other validators are working.
>>>> Anyway have anyone ever used "required" validator or can you use it now
>>>> once
>>>> to test.
>>>> Thanks
>>>> On Dec 10, 2007 5:26 PM, Simon Berger <> wrote:
>>>>> Do you have the Validation Interceptor on your Stack?
>>>>> Arpan Debroy schrieb:
>>>>>> I want to validate -
>>>>>> 1) The text box should have some value("required" validator doesn't
>>>> show
>>>>> any
>>>>>> error message even if it's empty)..
>>>>>> 2) The text box must have any numerical(I am using long data type)
>>>>> value. I
>>>>>> have no clue how to do it for long.
>>>>>> Can anyone please help..
>>>>>> Thanks
>>>>>> On Dec 6, 2007 1:50 AM, Dave Newton <>
>>>>>>> --- xniit2003 <> wrote:
>>>>>>>> I am trying to use "required" validator in struts2.
>>>>>>>> But it seems this one dosen't  work at all.
>>>>>>>> Have anybody successfully used "required" validator.
>>>>>>> What data type are you attempting to validate?
>>>>>>> d.
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>>>> --
>>>> Thanks & Regards
>>>>  Arpan Debroy
>>>> AOL Online India Private Ltd
>>>> RMZ EcoSpace Campus 1A
>>>> Outer Ring Road, Bellandur,
>>>> Bangalore - 560037
>>>> India
>>>> Mobile No :+9886006306
>>>> on-board :+91 (80) 4035 4528
>>>> E-mail :
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>>>> For additional commands, e-mail:
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Alberto A. Flores

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