Domino Code Fragment

Code Name*
Force the value of a field to be unique.		Date*
06/28/2025		Source (or email address if you prefer)*
[email protected]
IP address:.172.71.254.160
Description*
How to force the value of a field to be unique?		Type*
Formula		Categories*
(Misc)
Implementation:
Required Client:
Server:
Limitations:
Comments:
This formula first checks to make sure a value is entered. If a value is entered, it then uses that value as a key to lookup into the Company code view for a document containing that company code; if no document with that code is found, an error condition is created, which satisfies the @IsError @Function, and returns @Success. If a document with that code is found, the code is returned, which does not satisfy the @IsError function, causing the @Failure message to be returned.
Files/Graphics attachments (if applicable): Code:
How to force the value of a field to be unique?

This assumes you have a field named CompanyCode as an editable field. It also assumes that you have a view called
"Company Code" which has CompanyCode column.

Use the following input validation formula for CompanyCode:

  @If(
      CompanyCode = "";
        @Failure("You have to fill in Company Code");
        @IsError(
            @DbLookup("" : "NoCache";  ""; "Company Code"; CompanyCode; CompanyCode));
          @Success;
        @IsNewDoc = 0;
          @Success;
      @Failure("The company code you entered has already exist, please change it")
    )