Hi all, I'd like to end my survey by giving participants a unique survey completion code (a non-repeating 5 digit number) that appears on the final page of the survey.

Ideally, I'd like to be able to save these codes myself as participants would need it in order to withdraw from the study.

Can someone advise me how to implement this?

Best,
GM

Why not use the response ID?

Hi Tony, thanks for the response and suggestion. Is there a tutorial available to implement this?

Hi,
there is nothing to implement.
This {SAVEDID} gives you the ID of the response in the answer table.
It is an autoincrement number - starting with 1.

Try it yourself.
Create a small survey, activate it, enter some responses and have a look at the answer table.
To see this ID, just enter the placeholder {SAVEDID} in the question text of one of your questions.

Probably you do not want to display a "00001" to the first respondent, you may "hide" it.
Maybe by adding a constant number like {sum(18300,SAVEDID)} or other mathematical transformations.

And you may read the manual here
[url] www.limesurvey.org/manual/ExpressionScript_-_Presentation [/url]

 

As the SAVEID is autoincremental, it might actually be a good idea to add a random part to it, like 3 random digits at the beginning, just to make it look like it is random. You can then ignore those 3 digits to identify the respondent and just use the numbers provided by the SAVEDID, which is always saved in your results table.

Might not be necessary in this specific case, but whenever you can easily "guess" codes, there are people how might use it to their advantage.

Really unique ?
To be used as validation ?
gitlab.com/SondagesPro/QuestionSettingsType/generateUniqId

Because a 5 digit code is really bad for validation.

Else with Expression manager : in a equation question{if(is_empty(self.NAOK),rand(10000,99999),self.NAOK)}