The URI segment $ref is invalid after the segment

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Posted on by Mike_Guzowski

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Hey,

I've got awkward error. Maybe some of you experienced it already or at least could tell me what it means.

The requested operation is invalid. Server Response: The URI segment '$ref is invalid after the segment <entity relationship name>

So, I launched my app successfully for users but at some point in time app users started to report a problem that images taken in the app stop save in database (CDS).

After quick debug session I've discovered that below error appeares after executing Relate function that should create relationship between image record and TestCompound entity (there is N:1 relationship, multiple photos to 1 test compound record).

Anyone knows why it's happening?

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Building Power Apps

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v-xida-msft Microsoft Employee on at

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Hi @Mike_Guzowski ,

Based on the error message that you mentioned, I think there is something wrong with the formula you provided.

The first argument of the Relate function is required to provide a Related table of a specific Entity record rather than the whole Entity.

I assume that you want to relate the image record to the first record of your TestCompound entity, please consider modify your formula as below:

Relate( First(testedCompound).'Test Dashboard Photos', /* <-- Type the RelatedTable of a specific record of your Entity */ Patch('Test Dashboard Photos', Defaults('Test Dashboard Photos'), {cr675_name: GUID(), entityimage: camCamera.Stream}) )

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

You may also need to type the following formula:

Relate( LookUp(testedCompound, FilteredColumn = "A specific value").'Test Dashboard Photos', /* <-- Type the RelatedTable of a specific record of your Entity */ Patch('Test Dashboard Photos', Defaults('Test Dashboard Photos'), {cr675_name: GUID(), entityimage: camCamera.Stream}) )

More details about the Relate function in PowerApps, please check the following article:

https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-relate-unrelate

Best regards,
Mike_Guzowski 219 on at

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Hey @v-xida-msft
Thanks for your answer. I wasn't precise enough - TestCompound is the entity but testedCompound is a selected specific record of that entity. So the gallery of test compounds contains Items definition of:
LookUp('Test Details', Id=selectedTest.Id).'Test Compounds'
And on item select there is a function call: Set(testedCompound,ThisItem);

So in other words the error persist even though I've provided in the first argument of the Relate function a Related table of a specific Entity record (not the whole Entity).

Moreover my relation works in a new app and worked in current app previously but at some point in time just it stopped work anymore.

Any clue why this error happened? What does $ref mean?