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Date: Fri, 12 Sep 2003 09:54:56 -0700
From: "K.C. Baltz" <kc.baltz@lollimail.com>
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To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
Subject: Re: Validate only if the field exists using Commons Validator
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OK, good to know the mask doesn't need  to allow for empty strings.  
Also, I'm not familiar with the differences that Struts introduces.

That being said, I've also had problems before where validator-rules.xml 
had a bunch of the validators set to depend on "required".  So even 
though the depends attribute for my field didn't say "required", they 
were being required.  I'm not sure if someone on my project changed it 
that way or if it came stock.   Something to think about if you find 
fields being required when you don't expect it.

K.C.

Gary Shea wrote:

>Just to keep things straight, discussion of the "required" and "mask"
>validators is of course only applicable to Struts.  WRT "mask", you're
>slightly wrong (I think!): if "depends" does not include "required", the
>"mask" test is never done unless the field is non-null and non-empty.
>The "mask" test does not need to allow for empty strings.
>
>        Gary
>
>[2003-09-11 20:09 -0700] K.C. Baltz (kc.baltz@lollimail.com) wrote:
>  
>
>>I think that as long as you have the "depends" attribute for the field 
>>set to "mask", but not "required", and your mask allows empty strings, 
>>you should be set to go.  Otherwise, you'll probably have to use the 
>>"requiredif" dependency.
>>
>>K.C.
>>
>>Radhika Menon wrote:
>>
>>    
>>
>>>Will it be possible to send an example on how to configure it in the validation.xml?
>>>
>>>Thanks
>>>Radhika
>>>--
>>>
>>>--------- Original Message ---------
>>>
>>>DATE: Wed, 10 Sep 2003 17:37:37
>>>From: Gary Shea <shea@gtsdesign.com>
>>>To: Jakarta Commons Users List <commons-user@jakarta.apache.org>,radsforyou@lycos.com
>>>Cc: 
>>>
>>> 
>>>
>>>      
>>>
>>>>Well, I'm not exactly an expert on validator, but I just figured out the
>>>>answer to this question myself a couple days ago.  I'm using Struts, and
>>>>Struts valdiation uses commons validator.  Struts has its own plugin
>>>>validators, which explicitly check GenericValidator.isBlankOrNull() on the
>>>>field, and ignore the field if true.
>>>>
>>>>I have followed the pattern in my plugin validators.
>>>>
>>>>      Gary
>>>>
>>>>[2003-09-10 23:21 +0530] Radhika Menon (radsforyou@lycos.com) wrote:
>>>>   
>>>>
>>>>        
>>>>
>>>>>Using Commons-Validator, is it possible to validate a field only if it exists on the form.
>>>>>For example, I have a situation in which a "text" field gets generated only if a certain condition is true. What I want to do is, I want to check that if this field exists then, validate that it is numeric against a "mask" which is defined in validation.xml.
>>>>>
>>>>>Is this possible?
>>>>>
>>>>>Thanks in advance
>>>>>Radhika
>>>>>
>>>>>
>>>>>
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>>>>>
>>>>>     
>>>>>
>>>>>          
>>>>>
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>>>>   
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>>>>        
>>>>
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>>>
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>>    
>>
>
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