Validating MappedDecimal

[Larry Morroni]

If I have a MappedDecimal and the user accidentally enters characters
in that field, I get a java.lang.NumberFormatException I am unsure
where I can catch this error and check against it. I tried creating
custom validations but I still get the error. Can someone give me
some insight?
Thanks,
Larry

[atta ur rehman]

Generally, I'd use String variables to get user input into, validate them and then assign to model attributes. But Lift might have some tricks up its sleeves that I'm may not be aware of.

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[Diego Medina]

this is what I have on one of my applications:

in the render method I have:

"name=qty" #> SHtml.onSubmit(s =>
asInt(s).foreach(stock.is.qty_initial.set(_))) &

so there I convert whatever the user entered into an Int, I just tried
and if I enter text, the result is just 0 in the database. Which is
what I wanted.

stock is an object that I create like this:

object stock extends RequestVar(InventoryStock.create)

But there is also a way to add validation on your model class, let me
see if I can find it ...

Something like this iirc

object price extends MappedDecimal( ...) {
override def validation = <your validation here> :: super.validation
}

Hope it helps

Diego

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Diego Medina
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(305) 788-4954
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[Larry Morroni]

Thanks, Diego. I have created my own custom validation but the
problem is that the custom validation seems to be expecting a
BigDecimal since that is what i am using for the MappedDecimal field.
The approach I was trying to take was to pass the field as a string
and then check if the string can be converted to a BigDecimal but I am
falling short on how to approach it.

> > For more options, visit this group athttp://groups.google.com/group/liftweb?hl=en.

[Diego Medina]

I use toInt, can you see if there is a toBigDecimal() ?

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