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Power Apps SaveData() Cache not always Saved

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Posted on by MOldfield

Hello,

We have implemented basic offline functionality into an app we are testing with the following OnStart function from the tutorials:

Set(Var,"N");

If(
Connection.Connected,
ClearCollect(xxxx,'xxxx'),
LoadData(xxxx,"xxxx",false)
);
SaveData(xxxx,"xxxx");
Set(Var,"Y")

Which works as expected and we can store records locally and submit them when reconnected. However we were running into an issue where the cache was not always saved. We were wanting to use the Set variable to display when the SaveData() had finished and the app was safe to close as our intended users will only use the app occasionally and frequently will start it up out of signal range and we wanted to be confident the cache was available so they would be able to use the app on site.

If I close the app and go offline as soon as the variable changes it never has the cache saved, but if I wait a further 10-20 seconds and do so it seems to save 100% of the time. Is there some way of instead checking if the SaveData() cache exists directly? At least a "if you go offline now you will be able to reopen the app again" since reopening PowerApps to an empty list is very frustrating. Given our users' situation we would like to be absolutely certain they will have access to the app out of signal.

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WarrenBelz 156,460 Most Valuable Professional on at

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Hi @MOldfield ,

Try this structure - I have put some names in to show the item being actioned

If( Connection.Connected, ClearCollect(colYourSaved,YourDataSouce); SaveData(YourCache,colYourSaved), LoadData(YourCache,colYourSaved,true) );

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MOldfield 7 on at

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Thank you for your response.

I've quickly dropped it in and it doesn't seem to have changed anything, if I go offline after the variable changes it still doesn't have the SaveData() and like before I still have to wait for a period of time to guarantee that I can open the app offline. I don't see why having the SaveData() inside the if true would change anything instead of doing if true and having SaveData() immediately afterwards.

I was just hoping that there would be a way for me to check if the SaveData() cache exists directly.

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WarrenBelz 156,460 Most Valuable Professional on at

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Hi @MOldfield ,

There is no way to check other than to load it while offline. I assume you are checking this on a mobile device - also how many records does your data list contain?

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MOldfield 7 on at

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Yeah, we would have liked to use the IfError() function with the loading to check if it was in place but it doesn't seem to work reading other posts here. If it's something that can't be done then we might just have to stick to an arbitrary timer.

Yes, we're checking on a mobile device. Right now it's only got a handful of test items but users won't be editing or interacting with items, just creating new ones.

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