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Records won't update in SharePoint list, getting "Fetching items failed" error.

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Posted on by Chlopky

Hello,

I'm trying to create a renting app for our users. They add some items into gallery and hit "rent" button. I would like to have my SP list updated in column "DostupneKlice" by -1 when reting.

I have this on my rent button:

ForAll(GalleryScannedKeys.AllItems, Patch(SeznamBytuKarvina,LookUp(SeznamBytuKarvina,Title=ThisRecord.Title,{DostupneKlice: DostupneKlice-1})))

No error when I save the app, only after I test it whole LookUp formula gets error: Error when trying to retrieve data from the network: Fetching items failed. Possible invalid string in filter query.

I'm assuming the issue lies in this part - Title=ThisRecord.Title - however I tried Title=Title, Title=Gallery.Selected.Title, etc. to no avail.

Could someone try to explain what is the issue here?

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Building Power Apps

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anandm08 1,936 Super User 2024 Season 2 on at

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hi @Chlopky ,
The issue seems to be with how the LookUp function is used inside the Patch function. Specifically, ThisRecord.Title might not be recognized correctly in this context. Instead of ThisRecord.Title, try using GalleryScannedKeys.Selected.Title or referencing the item directly from the ForAll iteration.

ForAll(GalleryScannedKeys.AllItems, Patch( SeznamBytuKarvina, LookUp(SeznamBytuKarvina, Title = Title), {DostupneKlice: DostupneKlice - 1} ) )

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Chlopky 8 on at

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Title = Title doesn't work. I tried GalleryScannedKeys.Selected.Title, this now goes without an error but instead of editing existing record in my SP list and decreasing the number. It creates new record, all metadata is empty except DostupneKlice column which records 1 (see screenshot).

Yellow is the record I was searching for and displaying in my gallery and wanted to decrease, red is new empty record created by clicking button "Rent".

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mmbr1606 14,629 Super User 2026 Season 1 on at

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hey @Chlopky

can u try this:

ForAll(GalleryScannedKeys.AllItems, Patch(SeznamBytuKarvina, LookUp(SeznamBytuKarvina, Title = Title, {DostupneKlice: DostupneKlice - 1})))

or this:

ForAll(GalleryScannedKeys.AllItems, With({currentTitle: Title}, Patch(SeznamBytuKarvina, LookUp(SeznamBytuKarvina, Title = currentTitle, {DostupneKlice: DostupneKlice - 1})) ) )

Let me know if my answer helped solving your issue.

If it did please accept as solution and give it a thumbs up so we can help others in the community.

Greetings

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Chlopky 8 on at

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Unfortunately both of these give me same fetch error.

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IonutHzd 87 on at

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Hello,

I would suggest using the ID instead of Title. And in situations where you are not sure which column is being used you can use the AddColumns function. You can try something like this:
ClearCollect(temp, AddColumns(GalleryScannedKeys.AllItems, "Identificator", ID));
ForAll(
temp,
Patch(
SeznamBytuKarvina,
LookUp(SeznamBytuKarvina, ID = Identificator, ThisRecord),
{ DostupneKlice: DostupneKlice - 1 }
)
);

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Chlopky 8 on at

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I managed to get my Patch function working with this:

Patch(SeznamBytuKarvina,LookUp(SeznamBytuKarvina,Pasport=varPasportNumber), {DostupneKlice: LookUp(SeznamBytuKarvina, Pasport=varPasportNumber).DostupneKlice -1})

However without ForAll function it currently edits only one selected record from the gallery. I created a collection and tried this:

ForAll(colScannedKeys,Patch(SeznamBytuKarvina,LookUp(SeznamBytuKarvina,Pasport=ThisRecord.Pasport), {DostupneKlice: LookUp(SeznamBytuKarvina, Pasport=ThisRecord.Pasport).DostupneKlice -1}))

But I am at square zero with error: Error when trying to retrieve data from the network: Fetching items failed. Possible invalid string in filter query.

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