QS:Em validation q/nl

Vraag validatie vergelijking (em_validation_q)

 Tip: De functie is beschikbaar vanaf versie 1.92

Beschrijving

This is an equation that is used to validate the entire question (e.g all of its parts collectively for a multi-answer question). If the question fails the validation criteria, then then em_validation_q_tip message has the CSS style .error set to it. This tip uses the .em_q_fn_validation CSS style, which is hidden by default within template.css.

The main difference between this feature and the Sub-question validation equations (em_validation_sq option) is that for this feature, if the question (or question parts) fail validation, then an error message could be shown. For the sub-question validation, each text entry cell (e.g. in array, but also applies to single entry question types) will be styled so that the background color is pink.

Geldige waarden

• Een vergelijking die de syntax gebruikt die beschreven is in de Expressie Beheer, zonder de omringende accolades.

Voorbeeld

• • Je wilt demografische informatie verzamelen van gebruikers met een meerdere korte tekst vraag, en je wilt valideren dat de gebruiker een goed e-mailadres en telefoonnummer invult.

Voorbeeld, met ongeldige gegevens:

And here is what it looks like with one invalid answer:

Here is how you edit a question to enter that information:

And here is part of the Show Logic File output that lets you validate the accuracy of your expression and ensure there are no syntax errors:

As you can see, the validation equation tests that both the email and phone are either empty or match a regular expression filter.

The validation tip only shows the warning message if the phone or email appears invalid.

 Hint: Remember, LimeSuvey uses the Perl syntax for regular expressions, so they should start and end with / (slash character)!