Em validation sq: Difference between revisions
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'''Valid values''' | '''Valid values''' | ||
Any equation, using [[Expression Manager|Expression Manager]] syntax, without surrounding curly braces. | |||
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[[Category:Question Settings]][[Category:Advanced Question Settings]] | |||
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Revision as of 19:26, 12 June 2013
Sub-question validation equation (em_validation_sq)
Description
This is an equation that is used to validate each sub-question (text field) individually. Any text field that does not pass these validation conditions will have its background color turned pink (using the .em_sq_fn_validation CSS style) to highlight the error. Note that this is available in addition to the regular expression-based validation option.
Valid values
Any equation, using Expression Manager syntax, without surrounding curly braces.
Examples
Say you have a multiple short text question and you want to collect email addresses. You could use the regular expression validator to make sure the email address has proper syntax, but that doesn't guarantee that the domain name exists. You could add a function to Expression Manager called validateEmail() which uses DNS lookup service to validate the existence of the domain.
As another example, say you only want to allow numbers that are a multiple of 3, the equation would be:
(this / 3) == floor(this/3)
The reserved variable this is automatically replaced by a reference to the active text entry cell.