Patch: Update sharepoint list

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Posted on by ChrisUndery

179

I have an app that records, via Patch OnStart, various info about the user when they first log into the app (see code).

Patch(
 'Mentee Interest Tracking',
 Defaults('Mentee Interest Tracking'),
 {
 PotentialMenteeEmail: User().Email,
 Mentee: {
 Claims: "i:0#.f|membership|" & User().Email,
 Department: "",
 DisplayName: "",
 Email: "",
 JobTitle: "",
 Picture: ""
 },
 Department: Office365Users.MyProfileV2().department,
 Location: Office365Users.MyProfileV2().officeLocation
 }
);

What I want to do is update the record created, in the 'Mentee Tracking List' SP list, when the app was opened (add new info into column not initially populated) if the user selects an entry in a gallery within the same session in the app. The gallery is based around an individual and I would like it to populate a person column in the list.

The field in the gallery that identifies the person needed is: ThisItem.'Mentor Name'.Email
The name of the column in the list that needs to be populated is: MentorofInterest

I know Patch can do this via the 'OnSelect' elemnet of the Gallery item but cannot work out how

Any help appreciated.

Categories:

Building Power Apps

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BCBuizer 22,551 Super User 2026 Season 1 on at

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Hi @ChrisUndery ,

What you can do is to save the created item in the App.Onstart property in a variable to use later on in the app when the user selects an item in the gallery:

Set( varCurrentSession, Patch( 'Mentee Interest Tracking', Defaults('Mentee Interest Tracking'), { PotentialMenteeEmail: User().Email, Mentee: { Claims: "i:0#.f|membership|" & User().Email, Department: "", DisplayName: "", Email: "", JobTitle: "", Picture: "" }, Department: Office365Users.MyProfileV2().department, Location: Office365Users.MyProfileV2().officeLocation } ) );

In the OnSelect property of the gallery you can then include a new Patch function which will update the item that is saved in the variable:

Patch( 'Mentee Interest Tracking', varCurrentSession, { MentorofInterest: ThisItem.'Mentor Name' } );

The above will work if 'Mentor Name' and MentorofInterest are both People type columns.

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ChrisUndery 179 on at

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Hi @BCBuizer.

Both 'Mentor Name' and 'MentorofInterest' are person columns but they are not in the same list. The 'MentorofInterest' is in the 'Mentee Interest Tracking' list whereas the 'Mentor Name' is in a list called 'Find A Mentor'. Both lists are linked to the app.

Its also worth noting that the user might look at more than one mentor per session. the 'Mentor of Interest' column has been set to accept multiple records.

The Patch on the 'OnSelect' returns the following error

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ChrisUndery 179 on at

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The actual list column name of the 'Mentor Name' column in the 'Find A Mentor' list is just Mentor

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BCBuizer 22,551 Super User 2026 Season 1 on at

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Hi @ChrisUndery ,

The first point, about the column being in different data sources is not an issue. The second, about 'Mentor of Interes' being a multiselect column, is. This means we can't just patch a record to it, but we need to patch a table and append new records as the user selects more options.

In theory this should look something like the below:

Patch( 'Mentee Interest Tracking', varCurrentSession, { MentorofInterest: UnGroup( Table( { _temp: LookUp( 'Mentee Interest Tracking', ID = varCurrentSession.ID ).MentorofInterest }, { _temp: ThisItem.'Mentor Name' } ), "_temp" ) } );

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ChrisUndery 179 on at

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@BCBuizer That comes up with errors on a few bits.
Would it be neater/easier to change the Mentor of Interest' person column back to single select and then patch a new record each time the user clicks on the gallery item. This would still meet my needs.

If so, what would the patch on the 'onselect' need to look like (and assume would need to remove the variable as no longer being used)? I assume it would be the same as the onstart patch but with extra to get the Mentor Name in

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BCBuizer 22,551 Super User 2026 Season 1 on at

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Hi @ChrisUndery ,

The cleanest method would be to create a new list in which a new item is created every time the user selects an item in the gallery. This list would save the selected mentor and a reference to the current session as saved in the 'Mentee interest Tracking' list.

For this to work you still need the variable in order to populate the relation with the 'Mentee interest Tracking' list, so the App.Onstart formula stays the same, but the Gallery.OnSelect changes to:

Patch( 'Selected Mentors', Defaults('Selected Mentors'), { SessionID: varCurrentSession.ID, MentorofInterest: ThisItem.'Mentor Name' } );

In the above I have picked some of the identifiers which you still may want to change:

- 'Selected Mentors': the name of the to be created list

- SessionID: A Text column that saves the ID of the session, creating a relation with the 'Mentee Interest Tracking' list

- MentorofInterest: A Person column that saves the name of the selected mentor in the gallery.

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