Support for optional validator constraints
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Key: TAPESTRY-1635
URL: https://issues.apache.org/jira/browse/TAPESTRY-1635
Project: Tapestry
Issue Type: Improvement
Components: tapestry-core
Affects Versions: 5.0.5
Reporter: Dan Adams
Fix For: 5.0.6
I have a validator called 'method' that takes an optional string constraint
which defaults to a reasonable value based on the field name. As of 5.0.5 you
could do:
<t:textfield t:id="name" validate="method" />
you have to do:
<t:textfield t:id="name" validate="method=" />
to make the parameter an empty string. otherwise you get an exception that you
didn't specify the constraint. I need a way of specifying that this constraint
can be optional so you can use it with the first method. Also, I'm not sure if
being able to do the second method should be considered a bug since the
constraint is required but the value is empty.
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