Em validation q
From LimeSurvey Manual
Revision as of 17:45, 26 September 2014 by DenisChenu (Marked this version for translation)
Whole question validation equation (em_validation_q)
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.
- Any equation, using Expression Manager syntax, without surrounding curly braces.
- You want to collect demographic information from users via a multiple short text question, and you want to validate that the user has entered a reasonable email and phone number.
This example shows how the question looks with invalid answers:
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.