Hi All,
I am having trouble getting my mind around the boolean expression
semantics of the validwhen validator. Consider the following example.
I have a form with two possible input groups depending on the user
selection. If the entity is an individual, then I need to require
firstName etc. If the entity is a business then I need to require a
business name. Below is my validation code.
<field property="firstName" depends="validwhen, mask">
<arg0 key="prompt.common.firstName" />
<var>
<var-name>mask</var-name>
<var-value>${alphaname}</var-value>
</var>
<var>
<var-name>test</var-name>
<var-value>(entityType == "individual")</var-value>
</var>
</field>
<field property="lastName" depends="validwhen, mask">
<arg0 key="prompt.common.lastName" />
<var>
<var-name>mask</var-name>
<var-value>${alphaname}</var-value>
</var>
<var>
<var-name>test</var-name>
<var-value>(entityType == "individual")</var-value>
</var>
</field>
<field property="ssn" depends="validwhen, mask">
<arg0 key="prompt.common.ssn" />
<arg1 key="prompt.common.ssn.format" />
<var>
<var-name>mask</var-name>
<var-value>${ssn}</var-value>
</var>
<var>
<var-name>test</var-name>
<var-value>(entityType == "individual")</var-value>
</var>
</field>
<field property="birthDate" depends="validwhen, date">
<arg0 key="prompt.common.birthDate" />
<var>
<var-name>datePatternStrict</var-name>
<var-value>${date}</var-value>
</var>
<var>
<var-name>test</var-name>
<var-value>(entityType == "individual")</var-value>
</var>
</field>
<field property="businessName" depends="validwhen, mask">
<arg0 key="prompt.common.businessName" />
<var>
<var-name>mask</var-name>
<var-value>${alphaname}</var-value>
</var>
<var>
<var-name>test</var-name>
<var-value>(entityType == "business")</var-value>
</var>
</field>
However when "business" is the entityType, firstName, lastName, ssn,
and birthDate show up as required in the error messages. When the
entityType is "individual" businessName shows up. I thought that the
value was reversed in the jsp, hence reversing it when it is being set
into the form. I debugged the validate method and the enityType is
being set correctly. This operand seems sufficient to work correctly.
However changing all of the == to != seems counterintuitive to me.
It seems to me that my logic should work. {firstName} is required
when {entityType} == "individual". Can someone explain the semantics
of the need to negate all of the expressions?
Thanks,
Todd
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