| --- |
| layout: default |
| title: expression validator |
| parent: |
| title: Validation |
| url: validation.html |
| --- |
| |
| # expression validator |
| {:.no_toc} |
| |
| * Will be replaced with the ToC, excluding a header |
| {:toc} |
| |
| ## Description |
| |
| A Non-Field Level validator that validates based on regular expression supplied. |
| |
| ## Parameters |
| |
| - `expression` - the Ognl expression to be evaluated against the stack (Must evaluate to a Boolean). |
| |
| ## Examples |
| |
| ```xml |
| <validators> |
| <validator type="expression"> |
| <param name="expression"> .... </param> |
| <message>Failed to meet Ognl Expression .... </message> |
| </validator> |
| </validators> |
| ``` |
