I am trying to create a validation for the s:file tag to ensure that a
file name was provided.
My tag looks like this:
<s:file name="xls" size="30"/>
I tried using the validation:
<field name="xls">
<field-validator type="requiredstring">
<message key="err.msg.requiredstring"/>
</field-validator>
</field>
However, the validation always fails whether the file name is empty or
not.
I then saw in the example showcase apps that they used the following
validation:
<field name="xls">
<field-validator type="fieldexpression">
<param name="expression"><![CDATA[xls.length() >
0]]></param>
<message key="err.msg.requiredstring"/>
</field-validator>
</field>
However, when I attempt to do this I always get a NPE:
WARN - OgnlValueStack.logLookupFailure(269) | Caught an exception while
evaluating expression 'xls.length() > 0' against value stack
java.lang.NullPointerException: target is null for method length
WARN - FieldExpressionValidator.validate(80) | Got result of null when
trying to get Boolean.
Does anyone know the correct syntax for this?
Thanks in Advance!
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