How to set a duplicate value

[Cesarjblues]

Hi Community,

Im a creating a app for vacations, I have an scroll menu with this dates: 

14 ENERO 2021 / 30 ENERO 2021 (FT)
02 FEBRERO 2021 / 18 FEBRERO 2021 (FT)
22 FEBRERO 2021 / 10 MARZO 2021 (FT)
13 MARZO 2021 / 31 MARZO 2021 (FT)
03 ABRIL 2021 / 20 ABRIL 2021 (FT)
23 ABRIL 2021 / 11 MAYO 2021 (FT)
14 MAYO 2021 / 01 JUNIO 2021 (FT)
04 JUNIO 2021 / 23 JUN 2021 (FT)
04 JUNIO 2021 / 23 JUN 2021 (JR)

What I have done to avoid duplicated values, its to set on my SP list, unique values for this columns, but I want it to show an error message that alets that this option its already choosen. 

Thanks for your help

[indhaa]

Hi

You could customize the error message of the data card and set the text property to what you want
Example

In the visible property of the Error, you can add the condition

[Cesarjblues]

Hi, 

My apologize, I want to know wich formula it would work before to submit form, I have my submit button with this formula "SubmitFomr(form2);;Navigate(correct)... I need to check before to upload the info to check for duplicates 

[indhaa · Accepted solution]

Hi,

Do you mean that you have a scroll menu with custom date. So I'm assuming user can select only one date and you want to check from SP List if the date selected is already selected by another user.

In the submit button, you can set the verification as below and you can also set a popup msg if duplicate is there.

Also better you put a filter to remove the duplicate data from the scroll menu too. 

in the submit button put the below code

If

(

!IsBlank(LookUp(SPList, SPListColumnDate=ScrollMenuDataCardValue34.SelectedDate)),
Set(ShowPopUp,true),
SubmitForm(form2)

)

[Cesarjblues]

Hi,

If(!IsBlank(LookUp('Solicitud de vacaciones', periodos=DataCardValue20.periodos)),Set(ShowPopUp,true),SubmitForm(form1);;Navigate(Correcto)

I tried with your formula but appears all this error messages in English "unexpected characters" and "invalid number of arguments on this formula".

Sorry for the inconveniences

[indhaa]

Hi 

i see the closed bracket missing from your If Statement

If(

!IsBlank(LookUp('Solicitud de vacaciones', periodos=DataCardValue20.periodos)),

Set(ShowPopUp,true),

SubmitForm(form1); Navigate(Correcto)

)