IsUUID ( text )

Checks if a text string is in UUID format, e.g. generated by Get(UUID).

Average rating: 4.3 (32 votes) Log in to vote

John Hanson - Show more from this author
Pulp Studio
https://www.pulpstudio.com

Sample input:

IsUUID ( "random text" )
IsUUID ( "37EEAC77-E584-8642-A026-5BA61C66DDB1" )
IsUUID ( "" )

Sample output:

0
1
0

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*
CUSTOM FUNCTION: IsUUID ( text )
© 2014 John Hanson, Pulp Studio

Returns a Boolean result of True if the text string matches a UUID generated by Get(UUID). Useful (along with IsEmpty()) for validating UUID-based ID fields with direct data entry, e.g. with drop-down lists for type-ahead lookups.

VALIDATION EXAMPLE:
  IsUUID( Self ) or IsEmpty( Self )

*/

Let(
[
~h = "-";
~hex = "abcdef0123456789"
];

~h = Middle ( text ; 9 ; 1 ) and
~h = Middle ( text; 14; 1 ) and
~h = Middle ( text; 19; 1 ) and
~h = Middle ( text; 24; 1) and 
Length ( Filter ( Lower ( text ) ; ~hex ) ) = 32

)

Returns a Boolean result of True if the text string matches a UUID generated by Get(UUID). Useful for validating UUID-based ID fields with direct data entry, e.g. with drop-down lists for type-ahead lookups.

Credit to Daryl Eisner for additional hex filtering.

Comments

		Daryl Eisner, San Diego Oct 15, 2014
Very nice and simple. Like it. Maybe add this to the end of the function: "and Length ( filter ( Lower ( text ) ; "abcdef0123456789-" ) ) = 36"

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

IsUUID ( text )

Comments

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