IsValid()

2017-11-03 09:05:09

Category: Logical

Syntax: `IsValid ( expression )`

Parameters:

expressionTypically a field name, but can be any valid FileMaker Pro calculation formula.

Data type returned: Number

Description:

Returns either a 1 (true) or a 0 (False), depending on whether the field or expression returns valid data.

IsValid returns a 0 if there is a data type mismatch (for example, 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:

Function	Results
`IsValid (myField)`	Returns `1` (true) when `myField` is present and contains data appropriate to its defined data type.
`IsValid (Contacts::Name)`	Returns `0` (False) if the current record has no related records in the Contacts table, or if the fields in the records in question all contain invalid data.

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