Access gallery item in ForAll loop

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Posted on by AnthonyPhan

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Hi,

How can i access the value of a textbox that is nested within a gallery? What I am trying to achieve is loop though each item in the gallery and get the textbox1 value. to patch to a datasource.

I have tried the following. however the loops keeps accessing the first itean of the gallery instead of getting the row relevent to that part of the loop.

ForAll(Gallery1.AllItems, UpdateIf(Collection1, ID = ID, {TOOL: Value(TOOL_TI.Text)}))

NOTE: the following works if the collection is replaced with an SQL database, however I require it to work fo a local collection.

ForAll(Gallery1.AllItems, 
 Patch(EmployeeWorkOrderAssignments,{ID:ID}, {TOOL: Value(TOOL_TI.Text)}
 )
)

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Building Power Apps

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Jeff_Thorpe 6,085 Super User 2024 Season 1 on at

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I think PowerApps is confused with the "ID = ID". It needs to know which one belongs to "Gallery1.AllItems" and which one belongs to "Collection1". Try this and see if it helps.

ForAll(Gallery1.AllItems, UpdateIf(Collection1, ID = Collection1[@ID], {TOOL: Value(TOOL_TI.Text)}))

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AnthonyPhan 284 on at

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Hi @Jeff_Thorpe

I appreciate the response. I implemented your suggestion. For some reson it is now only referencing the last textbox in the gallery when looping.

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Meneghino 6,949 on at

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Another way to dismbiguate is to rename the column in the gallery
ForAll(RenameColumns(Gallery1.AllItems, "ID", "GalleryId"), UpdateIf(Collection1, ID = GalleryId, {TOOL: Value(TOOL_TI.Text)}))
However, I think patching a table instead of one row at a time could be a better performing solution, something like this:

Patch(Collection1, ShowColumns(Gallery1.AllItems, "ID"), ShowColumns(AddColumns(Gallery1.AllItems, "TOOL", Value(TOOL_TI.Text)),"TOOL"))

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Meneghino 6,949 on at

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Hi @Jeff_Thorpe, the diagnosis seems correct and the suggested direction is correct.
You must keep in mind however, that unless disambiguation is used, the dominant column is that of the inneremost expression i.e. the last named table.
Hence ID will mean ID of Collection1, so the solution you suggest should give the same result as ID=ID
I am not aware of a way to disambiguate a two part table name (i.e. Galler1.AllItems), as would be required, hence my suggestion to simply rename the column.

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Jeff_Thorpe 6,085 Super User 2024 Season 1 on at

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@Meneghino, thanks for the insight. I think I have a better understanding now.
@AnthonyPhan, based on @Meneghino's feed back I believe this formula will work (at least it did in my test app). If @Meneghino solution doesn't workout for you, give this a try:

ForAll( AddColumns(Gallery1.AllItems, "tmpID", ID), UpdateIf(Collection1, tmpID = ID, {TOOL: Value(TOOL_TI.Text)}) )
It removes the disambiguation by putting the ID value in a temporary column and then the rest of the formula references the temporary column.

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chico 638 on at

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This little nugget of info just helped a TON.

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jnernst 166 on at

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@Jeff_Thorpe
@Meneghino
You guys are heroes.

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