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  • How to validate field formats, such as a phone number
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Validating the format of String fields for patterns (such as a phone number) is easy with StringRegexValidator (named "regex" in the default validator configuration).

Simply add the validator the field in question, and supply a regular expression to match it against.

If your expression tests against alpha characters, you may be interested in the "caseSensitive" parameter of with Validator as well. It defaults to "true".

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  1. Parameters are:

    • fieldName
    • expression
    • caseSensitive

    So the attribute of the param label should be for this case "expression".

    <field name="phone">
    <field-validator type="regex">
    <param name="expression">(\d\d\d) \d\d\d-\d\d\d\d</param>
    <message>Phone number must be in the format (XXX) XXX-XXXX</message>

    David A. Christensen

    1. Fixed - thanks for letting us know.