Returning a FieldValidator to a TextField

[Nuno Ferreira <nu...@gmail.com>]

Hello all,

I'm new to tapestry and wanted to do a simple form with user defined fields.

I have a Field class which contains a String Value and a String set of
restrictions.

I wanted to do something like this:

<input type="text" t:type="TextField" *
t:validate="currentField.fieldValidator"*  t:value="currentField.fieldValue"
/>

My idea was to use the already existing FieldValidators like required,
regexp, min, etc...

Would like you're opinion on how to do this, if its even possible. I'm a bit
clueless.

Thanks in advance,
Nuno Ferreira

Re: Returning a FieldValidator to a TextField

[Nuno Ferreira <nu...@gmail.com>]

On 29 January 2010 17:47, Thiago H. de Paula Figueiredo
<th...@gmail.com>wrote:

> Inject FieldValidatorSource and use its FieldValidator
> createValidators(Field field, String specification) method to generate a
> FieldValidator. Then create a FieldValidator getValidator() method using
> createValidators() and add t:validate="prop:validator" to your TextField.
>
>
Thanks, this got me in the right direction. I can already create a
fieldValidator successfully. The thing is that I found to create it I need
to have a @InjectComponent("textFieldName") and the only way I know to do
this is inside a page Class.

I resolved this adding a fieldValidator to each of my "Field" object when I
render the page. My code is like this:

<t:loop source="fields" value="currentField" t:formstate="ITERATION">
            <t:if test="currentField.visible">
                <tr>
                    <td><label
for="currentField.fieldName">${currentField.fieldName}:</label>
                    </td>
                    <td><input type="text" t:type="TextField" t:id="field"
                        t:value="currentField.fieldValue"
t:validate="prop:currentField.fieldValidator"/></td>
                </tr>
            </t:if>
 </t:loop>


This works fine except when using InjectComponent I need to give it a
fieldId and since I use a loop I don't really know what the field ID's are
(except that they are ID_0, ID_1, etc..) . This is not critical but in a
presentation point of view it points the errors to the wrong field. Is there
any way to bind a fieldValidator to a field without using InjectComponent in
the page class?


Thanks in advance,
Nuno Ferreira

Re: Returning a FieldValidator to a TextField

["Thiago H. de Paula Figueiredo" <th...@gmail.com>]

On Fri, 29 Jan 2010 10:33:10 -0200, Nuno Ferreira <nu...@gmail.com>  
wrote:

> Hello all,

Hi!

> My idea was to use the already existing FieldValidators like required,
> regexp, min, etc...

Inject FieldValidatorSource and use its FieldValidator  
createValidators(Field field, String specification) method to generate a  
FieldValidator. Then create a FieldValidator getValidator() method using  
createValidators() and add t:validate="prop:validator" to your TextField.

-- 
Thiago H. de Paula Figueiredo
Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,  
and instructor
Owner, software architect and developer, Ars Machina Tecnologia da  
Informação Ltda.
http://www.arsmachina.com.br

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