Sure, sounds like you want a numeric-only string. Tapestry has a
Pattern validator, but I don't know if you can specify the pattern
inside your 'validators:' value. I always set up pattern validators
as beans and then reference them in the 'validators:' value, like so:
<bean name="numericValidator"
class="org.apache.tapestry.form.validator.Pattern"
lifecycle="page">
<set name="pattern">'^[0-9]+$'</set>
<set name="message" value="message:invalid-numeric-input" />
</bean>
<component id="numericStringField" type="TextField">
<binding name="value" value="myNumericString" />
<binding name="displayName" value="message:my-numeric-string-
label" />
<binding name="validators" value="validators:required,
$numericValidator" />
</component>
I'm using the '$' syntax to reference a bean in the 'validators:'
value. Note that I'm using localizable message keys, but you can of
course use literal strings for your messages. Also note that I'm
setting 'lifecycle="page"' in the bean definition. This should give
slightly better performance by causing the bean to be instantiated
only once, rather than on each page render.
One more thing -- since this TextField represents a String value, you
don't need to specify a translator unless you want to change the
default string translation behavior (you probably already knew that).
-Ryan
On Oct 14, 2006, at 1:39 PM, Jabbar wrote:
Ryan,
Hello again. Is it possible to use a regular expression with a
textfield? I don't want to use it to read a number, but a string.
Thanks
On 14/10/06, Ryan Holmes <[EMAIL PROTECTED]> wrote:
Change this:
<binding name="translator" value="translator:number,pattern=#.#"/>
to this:
<binding name="translator"
value="translator:number,pattern=#.#,omitZero=false"/>
The 'omitZero' property in
org.apache.tapestry.form.translator.NumberTranslator is true by
default. Paul Ferraro (who I believe contributed much of the
translation and validation system for Tap 4.0) argues that omitZero
should be false by default in this JIRA issue:
http://issues.apache.org/jira/browse/TAPESTRY-633
So vote for it if you agree.
-Ryan
On Oct 14, 2006, at 11:44 AM, Jabbar wrote:
> Oops. The textfield component definition is
>
> <component id="dailyHighThreshold" type="TextField">
> <binding name="value"
> value="currentChannelSetup.dailyThreshold.highThresholdDouble"/>
>
> <binding name="translator"
> value="translator:number,pattern=#.#"/>
> <binding name="validators"
> value="validators:required[You must
> enter {0}!], min=0"/>
> <binding name="displayName"
> value="literal:Daily High Threshold"/>
>
> <binding name="disabled"
> value="!currentChannelSetup.dailyThreshold.dailyThresholdEnabled"/>
> </component>
>
> On 14/10/06, Jabbar <[EMAIL PROTECTED]> wrote:
>> Hello again,
>> I have another problem. It concerns the textfield the
definition is
>>
>> <component id="dailyHighThreshold" type="TextField">
>> <binding name="value"
>> value="currentChannelSetup.dailyThreshold.highThresholdDouble"/>
>> <!--
>> <binding name="translator"
>> value="translator:number,pattern=#.#"/>
>> <binding name="validators"
>> value="validators:required[You must
>> enter {0}!], min=0"/>
>> <binding name="displayName"
>> value="literal:Daily High Threshold"/>
>> -->
>> <binding name="disabled"
>> value="!
currentChannelSetup.dailyThreshold.dailyThresholdEnabled"/>
>> </component>
>>
>>
>> when value is numeric 0 then the textfield also shows a blank. I
>> don't
>> understand this! Anybody got any ideas?
>>
>>
>> --
>> Thanks
>>
>> A Jabbar Azam
>>
>
>
> --
> Thanks
>
> A Jabbar Azam
>
>
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Ryan Holmes, CISSP
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--
Thanks
A Jabbar Azam
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