Can I not drop and add column with the same name?

[martinav]

Why is this broken?

ClearCollect(NextDataItems,RenameColumns(FirstN(Filter(temporary_assign_wo,Updated<>2 And !IsBlank(_SNValve)  ),Value(TextInput6.Text)),"SN_List","SN_List_Del"));
AddColumns(NextDataItems,"SN_List","d")

This works fine if I give the new column a different name.

I initially used DropColumns() but it resulted in the same issue.  Renaming it out of the way doesnt work either.

[Alex_10]

@martinav 

ClearCollect(NextDataItems,
    AddColumns(
        DropColumns(
            AddColumns(
                FirstN(
                  Filter( temporary_assign_wo, Updated<>2 && !IsBlank(_SNValve) ),
                  Value(TextInput6.Text)
                ),
                "SN_List_Del", SN_List
            ),
            "SN_List"
        ),
        "SN_List", "d"
    )
);

[martinav]

@Alex_10 ,

Yep, thats what I did the first time.  Same result.  It is intuitively correct, but no workie.

Its all happy if I change the name...  same issue.  It MUST be the same name, so I can do a patch back to a SQL list with identical column names.

[Alex_10]

@martinav 

i suspect DropColums does not really deletes the column if datasource is SP, just hides it.

the only solution i have here is taking a full control over the result collection:

Clear(NextDataItems);
ForAll(
    FirstN(
        Filter( temporary_assign_wo, Updated<>2 && !IsBlank(_SNValve) ),
        Value(TextInput6.Text)
    ) As ThisSN,

    Collect(NextDataItems,
        {
            Title: ThisSN.Title,
            SN_List_Del: ThisSN.SN_List,
            SN_List: "d"
        }
    )
)

[martinav]

@Alex_10 ,

Yea, I was hoping to avoid that.  There are like 25 columns.  Thats a LOTTA stuff.  

Well, anyway.

Thanks

[WarrenBelz]

Hi @martinav ,

This should work

With(
   {
      wList:
      DropColumns(
         temporary_assign_wo,
         "SN_List"
      )
   },
   ClearCollect(
      NextDataItems,
      AddColumns(
         FirstN(
            Filter(
               wList,            
               Updated <> 2 And !IsBlank(_SNValve)
            ),
            Value(TextInput6.Text)
         ),
         "SN_List",
         "d"
      )
   )
)

Note you have a Delegation limitation with Add/Drop columns but you already had that with both of your filter criteria and FirstN

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[martinav]

@WarrenBelz ,

Another great idea.  However, same result.  It still thinks its there.  I moved the filter around to make this a bit more simple where its broken.

With(
   {
      wList:
      DropColumns(
         FirstN(
            Filter(
               temporary_assign_wo,            
               Updated <> 2 And !IsBlank(_SNValve)
            ),
            Value(TextInput6.Text)
         ),
         "SN_List"
      )
   },
   ClearCollect(
      NextDataItems,
      AddColumns(wList,"SN_List","d")
   )
)

Result:

Same

Regarding delegation:  Its true, but for this purpose, it does not affect the purpose for which I'm using this.

[WarrenBelz]

Hi @martinav ,

I actually thought that would work, however the long way . . .

ClearCollect(
   colDrop,
   DropColumns(
      temporary_assign_wo,
      "SN_List"
   )
);
ClearCollect(
   NextDataItems,
   AddColumns(
      FirstN(
         Filter(
            colDrop,            
            Updated <> 2 And !IsBlank(_SNValve)
         ),
         Value(TextInput6.Text)
      ),
      "SN_List",
      "d"
   )
);
Clear(colDrop)

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[martinav]

@WarrenBelz ,

I've been down this avenue as well.  I'm with you about the 'should work' situation.  I suspect this must have something to do with the fact the data comes from an SQL Table?  Well, if nothing makes sense, it something that doesnt make sense that is the explanation.

[WarrenBelz]

Hi @martinav ,

Got it to work with ShowColumns (RenameColumns fails too in SharePoint) in the first bit - and you are correct that it should work . . .

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