Why aren't there any good VaLang examples/tutorials.

[netvampire]

Hello,
I admit to being new to spring, and I am looking to validate a simple form. When I saw how VaLang works, by not having to define a validation bean but instead just create an expression to validate a bean I got pretty excited. Finally, a simple, fast, and easy validation procedure.

however, i can not get VaLang working. i downloading spring-modules 0.8, and i have scoured the net for a decent tutorial on server side validation, however i can not find one that explains things well enough. Hopefull this forum can help me out.

I understand that in my *-servlet.xml file i should add something like this.

[code]
<bean id="myValidator" class="org.springmodules.validation.valang.ValangV alidator">
<property name="valang">
<value><![CDATA[
{ firstName : length(?) < 30 : 'First name too long' }
{ lastName : length(?) < 50 : 'Last name too long' }
]]></value>
</property>
</bean>
[code]


However, on my form, how do i ensure that the input fields firstName and lastName are subjected to this type of validation. Also, for multiple forms, do i just continue to fill the properties field with more names and validation conditions?

Any tutorial that will clearly explain how to use valang would be appreciated. I just need to know what to add in my *-servlet.xml file, anything to the controller class, and what to add on the view to ensure it gets validated.

I appreciate the help. THANKS! THANKS!

[netvampire]

I surfed the net and tried so many different tutorials.
for those who need it, The one that I followed to the T, and had it work successfully is this.

http://www.i-proving.ca/space/Techno...MVC/Validation

good luck to those embarking on valang. It is great once you figure out how it works.

[buntyindia]

netvampire can you please provide me sample code of working example...
It will be a gr8 help


Regards,

[netvampire]

I hope this helps.

In my dispatcher-servlet.xml file i have this type of validation working with valang

    <bean id="registrationValidator" class="org.springmodules.validation.valang.ValangValidator">
        <property name="valang">
            <value><![CDATA[
            { userName : ? is not blank : 'User Name: required.' }
            { userName : matches('\\w+',?) == true: 'User Name: Only Alpha-Numeric Characters' }
            { userName : matches('\\w+',?) == true: 'User Name: Only Alpha-Numeric Characters' }
            { userName : length(?) > 6 : 'User Name: Not between 6 - 12 characters.' }            
            { userName : length(?) < 12 : 'User Name: Not between 6 - 12 characters.' }            
            { firstName : ? is not blank : 'First Name: required.' }
            { firstName : matches('\\w+',?) == true: 'First Name: Only Alpha-Numeric Characters' }
            { lastName : ? is not blank : 'Last Name: required.' }
            { lastName : matches('\\w+',?) == true: 'Last Name: Only Alpha-Numeric Characters' }
            { email : ? is not blank : 'E-Mail: required.' }
            { email : email(?) == true: 'E-Mail: Not A valid Address' }
            { password : ? is not blank : 'Password: required.' }
            { password : matches('\\w+',?) == true: 'Password: Only Alpha-Numeric Characters' }
            { password : length(?) > 6 : 'Password: Not between 6 - 12 characters.' }            
            { password : length(?) < 12 : 'Password: Not between 6 - 12 characters.' }            
            { confirmPassword : ? is not blank : 'Confirm Password: required.' }
            { confirmPassword : matches('\\w+',?) == true: 'Confirm Password: Only Alpha-Numeric Characters' }
            { city : ? is not blank : 'City: required.' }
            { age : matches('\\d+',?) == true: 'Age: Only Numeric Characters' }
            { age : ? is not blank : 'Age: required.' }
            ]]></value>
        </property>
    </bean>

You may also need the correct library files to get this going (not sure, can't remember).

Hope it helps.

[Shearer]

Hi everyone, you can get good Valang examples from the ¨Expert Spring MVC and Web flow¨ book. they are covering valang in a good level, so I suggest you to take a look at it.