powerapps to check with startdate and enddate against sharepoint

[Vinith46]

Hi , Could you help me to resolve .

i am creating an app for for the technicians(Each technician has an unique ID), Users will book for technicians and technician will be alloted for that work  with start and end date booked.

now when an new user try to book for same technician(ID) then he should not be allowed to book for same startdate and enddate as he is already occupied with work. so here i have to compare with sharepoint for that Id weather he is already booked for that time period based on startdate and enddate.

In App i have startdate and enddate and data is getting saved in sharepoint with startdate and enddate.

Could you please help me for this, i have tried multiple codes but unable to find correct solution.

i have tried below code but its not correct, Its nly searching for one condition, we need to search for between dates and avaliable dates aswell

Filter(
'Listname',
startDateColumn >= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate /* <-- DateColumn is a Date Time type column in sharepoint list. DatePicker1 represents the Start Time, DatePicker2 represents the End Time */
)

[yashag2255]

Hi @Vinith46 

To get the list of Technicians, that are available between the two dates, you can use the below expression:

Filter(
    TechnicianDetails,
    !(
        And(StartDate >= DatePicker1.SelectedDate,StartDate <=DatePicker2.SelectedDate) 
        || 
        And(EndDate>= DatePicker1.SelectedDate,EndDate <=DatePicker2.SelectedDate)
    )
) 

Here, TechnicianDetails is my SP list with StartDate and EndDate as columns. While, DatePicker1 holds the filter startdate and DatePicker2 is for the Enddate.

Hope this Helps!

If this reply has answered your question or solved your issue, please mark this question as answered. Answered questions helps users in the future who may have the same issue or question quickly find a resolution via search. If you liked my response, please consider giving it a thumbs up. THANKS!

[svijay_001]

Hello @Vinith46 

From your description, I understand that you would like prevent booking of a technicians on an already booked date - Meaning there should be no no existing work on the dates you are planning to book. 

Well there should be 3 conditions met if we take a specific Technician. 

1.  The current booking start date should not be between any of the previously booked Start &  End dates (Previous Bookings).
2.  The Current booking end date  should not be between any of the previously booked Start &  End dates (Previous Bookings).
3. The bookings whose  start date is less than the current booking start date should not have the lesser end date than that of the current booking's end  date.

To sum up the above condition :

=====================

CB --> Current Bookings

PBs --> Previous Bookings

There will be overlap of work a specific work if  there are bookings returned in below Pseudocode conditions : 

CB.StartDate  between AnyOf(PBs.StartDate) && not between AnyOf(PBs.EndDate)

CB.EndDate  between AnyOf(PBs.StartDate) && not between AnyOf(PBs.EndDate)

CB.StartDate  greater than AnyOf(PBs.StartDate)  | for that PB | CB.Enddate > PB.Enddate

Sample Snippet of the Filter query Power Apps: 

Filter('Technician Booking List',Technicians.Selected.id= Title && (Dtpicker_Startdate.SelectedDate <= End Date' && Dtpicker_Startdate.SelectedDate>= 'Start Date' || Dtpicker_Enddate.SelectedDate >='Start Date' && Dtpicker_Enddate.SelectedDate <= 'End Date' || Dtpicker_Startdate.SelectedDate <= 'Start Date' && Dtpicker_Enddate.SelectedDate >= 'End Date'))

If the above filter returns any item - then the booking should not be allowed to avoid the overlapping.

Fresh Booking :

==========

There is nothing being populated under the "Already Booked days"

Now when we try to book something over lapping :

The Gallery source for the "Already Booked Dates"

Book Button DisplayMode source: 

Hope this helps ! 

[svijay_001]

Hello @Vinith46 

From your description, I understand that you would like prevent booking of the technicians on an already booked date - Meaning there should be no no existing work on the dates you are planning to book. 

Well there should be 3 conditions met if we take a specific Technician. 

1.  The current booking start date should not be between any of the previously booked Start &  End dates (Previous Bookings).
2.  The Current booking end date  should not be between any of the previously booked Start &  End dates (Previous Bookings).
3. The bookings whose  start date is less than the current booking start date should not have the lesser end date than that of the current booking's end  date.

Filter Snippet for the to return the items (if met the converse of the above condition from the previous bookings) : 

Filter('Test List',Technician_id.Selected.Title= Title && (Dtpicker_Startdate.SelectedDate <= 'End Date' && Dtpicker_Startdate.SelectedDate>= 'Start Date' || Dtpicker_Enddate.SelectedDate >='Start Date' && Dtpicker_Enddate.SelectedDate <= 'End Date' || Dtpicker_Startdate.SelectedDate <= 'Start Date' && Dtpicker_Enddate.SelectedDate >= 'End Date'))

If items are returned. then the booking should not be fulfilled

===========

[Screenshots]

===========

Fresh Booking

When there is already existing Booking

Already Booked days Gallery Source

Book Button source :

[v-xida-msft]

Hi @Vinith46 ,

Do you want to prevent users from booking for same technician(ID) with same startdate and enddate?

Th user @Mays has faced same issue with you, please check my response within the following thread:

https://powerusers.microsoft.com/t5/General-Discussion/How-to-make-powerapps-prevent-user-from-reque...

On your side, please take a try with the following workaround:

Set the OnSelect property of the "Submit" button to following:

If(
   !IsBlank(LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate)),
   Notify("The days from " & startDatePicker1.SelectedDate & " to " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).endDateColumn & " has been booked for current  technician!", NotificationType.Error),
   !IsBlank(LookUp('Listname', startDateColumn >= startDatePicker1.SelectedDate && endDateColumn >= endDatePicker2.SelectedDate)),
   Notify("The days from " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).startDateColumn & " to " & endDatePicker2.SelectedDate & " has been booked for current  technician!", NotificationType.Error),
   !IsBlank(LookUp('Listname', startDateColumn >= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate)),
   Notify("The days from " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).startDateColumn & " to " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).endDateColumn & " has been booked for current  technician!", NotificationType.Error),
   SubmitForm(EditForm1)    /* <-- Submit your form data */
)

In addition, if you also want to search for the specific technician in your SP list, please consider modify above formula as below:

If(
   !IsBlank(LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate && TechnicianIDColumn = "Specific Technician ID")),
   Notify("The days from " & startDatePicker1.SelectedDate & " to " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).endDateColumn & " has been booked for current  technician!", NotificationType.Error),
   !IsBlank(LookUp('Listname', startDateColumn >= startDatePicker1.SelectedDate && endDateColumn >= endDatePicker2.SelectedDate && TechnicianIDColumn = "Specific Technician ID")),
   Notify("The days from " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).startDateColumn & " to " & endDatePicker2.SelectedDate & " has been booked for current  technician!", NotificationType.Error),
   !IsBlank(LookUp('Listname', startDateColumn >= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate && TechnicianIDColumn = "Specific Technician ID")),
   Notify("The days from " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).startDateColumn & " to " & LookUp('Listname', startDateColumn <= startDatePicker1.SelectedDate && endDateColumn <= endDatePicker2.SelectedDate).endDateColumn & " has been booked for current  technician!", NotificationType.Error),
   SubmitForm(EditForm1)    /* <-- Submit your form data */
)

Please consider take a try with above solution, then check if the issue is solved.

More details about the Filter functions and IsBlank function, please check the following article;

Filter functions

IsBlank function

Best regards,