IsValid()

IsValid()

Category: Logical

Syntax: IsValid ( expression )

Parameters: expression ”typically a field name , but can be any valid FileMaker Pro calculation formula.

Description: Returns either a 1 (True) or a (False), depending on whether the field or expression returns valid data.

IsValid returns a if there is a data type mismatch (that is, text in a date field) or if FileMaker cannot locate the table or field that is referenced.

Otherwise it returns 1 , indicating that the data is valid.

Examples:

 IsValid (myField) 

Returns 1 (True) when myField is present and contains data appropriate to its defined data type.

 IsValid (Contacts::Name) 

Returns (False) if the current record has no related records in the Contacts table.