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RandyHayes
Super User
Super User

ThisRecord in a ForAll - Strange results

Greetings all.  You usually see me answering, but I thought I would post a question as I just ran into a bizarre situation with the (beloved) ThisRecord operator.

 

Cut to the chase, This formula (don't worry about the datasource, the limiting conditions, or data):

 

 

ForAll(
    Filter(Gallery1.AllItems, somelimitingcondition),

    UpdateIf(datasource, ID=ThisRecord.ID, {someData})
)

 

 

Will end up updating ALL of the records in the datasource.  If there are 2 out of 100 records returned by the Filter, all 100 records will be updated.  Definitely not expected!!

 

Interestingly enough, this formula:

 

ForAll(
    Filter(Gallery1.AllItems, somelimitingcondition),

    Collect(someCol, ThisRecord.ID);
    UpdateIf(datasource, ID=ThisRecord.ID, {someData})
)

 

 

Will STILL update all 100 records, but the collection will have 2 ID's in it!!!!

 

Have I been burned by a new function, or have I been working too hard?

 

I thought I would throw it out here to the collective to see if anyone else has experienced it.  I can reproduce it over and over.

 

And by the way - thank you to my friend @Gorilla_8 for taking me through a long journey to discover this (especially since I've been using the first formula a lot lately after waiting for ThisRecord for so long.)

 

Also by the way...I know the solution to resolve the problem as far as not using the ThisRecord operator, but that is not the point here.  Looking for anyone else experiencing this before reporting as a Bug!

 

 

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10 REPLIES 10
WarrenBelz
Most Valuable Professional
Most Valuable Professional

Thanks @RandyHayes ,

Saved me some grief as this was the next on my list to start exploring and as you have noted, it could produce some nasty results if used on live data.

I will stick to the As statement now as this works great on the Ambiguity issues in a ForAll with the same fields.

Definitely a bug that needs reporting to MS - and soon.

 

@WarrenBelz 

Yes, I thought I would throw it out here on the forum to see if anyone has experienced this and also to serve as a warning for those contemplating using it.

 

I put together a demo of this using a collection (still same result).  

The more I reviewed this and put the demo together the more I started to realize that perhaps this is not so much a bug in ThisRecord and ForAll, but more of an oversight in the documentation!

 

See the attached app for more details.

_____________________________________________________________________________________
Digging it? - Click on the Thumbs Up below. Solved your problem? - Click on Accept as Solution below. Others seeking the same answers will be happy you did.
NOTE: My normal response times will be Mon to Fri from 1 PM to 10 PM UTC (and lots of other times too!)
Check out my PowerApps Videos too! And, follow me on Twitter @RandyHayes

Really want to show your appreciation? Buy Me A Cup Of Coffee!
Guillaume_G
Advocate I
Advocate I

Hi @RandyHayes ,

 

Did you ever raise this as a bug? If so, was it ever resolved?

 

Thanks,

Guillaume.

warrenzahra87
New Member

Hi Randy,

 

This occurs whenever the name of the column of the datasource is the same name as a column in the datasource of the forall.

 

So what is happening with this piece of code 

UpdateIf(datasource, ID=ThisRecord.ID, {someData})

Is that you are comparing ID to ID as to access a column within a forall you do not need to specify ThisRecord before the column.

 

Best way is to either make use of the disambiguator operator [@datasource] or make use of the As operator as below

 

ForAll(
    Filter(Gallery1.AllItems, somelimitingcondition) As Item,

    UpdateIf(datasource, ID=Item.ID, {someData})
)

I had the same issue too but Thank you, your code works for me in this situation

This is still happening today 20 Jan 2023. It really should be fixed. Any way you look at it, this behaviour is just wrong.  Come on Microsoft!!!

moma
Frequent Visitor

YES, I'm facing the same issue today 28 Feb 2023. 

WarrenBelz
Most Valuable Professional
Most Valuable Professional

@moma and @LaelLeeH ,

Consider the As operator mentioned below- it works every time reliably. 

Thanks for this clarification and example on how to solve it.  Have spent all my day here trying to figure out what was going on.  Also, learned a new trick today since I have never used the As Statement.

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