Patch a Collection

[Meneghino]

You are welcome.

The way I understand it, it is cleaner to use AddColumns instead of ForAll when you just need to calculate a value.  I reserve ForAll for when there is a real need to use actions.

[Meneghino]

You are right, @Mike8, only the second part.

Here is the first part, with a bit of a cheat...

ClearCollect(Collection1,{Letter:"A",Number:1},{Letter:"B",Number:2},{Letter:"C",Number:3});
ClearCollect(Collection2,{SecondNumber:4},{SecondNumber:5},{SecondNumber:6});
ForAll(Collection2, Patch(Collection1, Last(FirstN(Collection1, SecondNumber-3)), {Number: SecondNumber}))

If you don't want to cheat, just add an index to both collections.

[Mike8]

Perfect. Thank you again @Meneghino.

Especially your first answer about the second part of my question really helped me.
I was using this:
ClearCollect(Collection3, AddColumns(Collection1, "New_column", Collection2.SecondNumber))
and I had the Collection2.SecondColumn in every record in a nested structure.
Problem solved. 🙂

[kullurumanoj]

This is the property I have setup to add data to sql server..getting error ; the first argument of patch should be a collection

Patch('[dbo].[Sample]',Defaults('[dbo].[Sample]'),
{
Organisation : DataCardValue15.Text,
Line_of_Business :DataCardValue16.Text,
Industry :DataCardValue18.Text ,
Director :DataCardValue19.Text ,
Product :DataCardValue20.Text ,
Engineering_Manager :DataCardValue21.Text,
Metrics_Reporter : DataCardValue22.Text })

[Meneghino]

Hi @kullurumanoj

I believe the error is related to your table structure.  The SQL table should have a primary key defined.

For example, see here:

https://powerusers.microsoft.com/t5/General-Discussion/Patch-problems-with-on-premises-SQL-gateway/m...

[kullurumanoj]

Heyy bro.. thanks it did work and the problem is when I try to edit the previous record ,a new record with the edited field is getting created instead of updating old record.

[Meneghino]

What happens depends on the second parameter of the Patch.

Use defaults to create a new record, or a simple record with primary key values to edit an existing record.

Like this:

Patch(DataSource, {ID: 123}, {TextColumn: "Foo"})

PS You can get better performance if you avoid the use of Defaults():

https://baizini-it.com/blog/index.php/2018/01/11/powerapps-replace-the-defaults-function-to-improve-...

[kullurumanoj]

hey my primary key is UID,but whenever I try to edit other fileds it says The item has already been created on the server, but able to edit UID and also it gets created as new record with edited UID,rest with same properties..I am a beginner need some help with this

Here is my code ;

Patch('[dbo].[Sample]',{UID:Blank()},
{UID : DataCardValue21.Text,
Organisation : DataCardValue22.Text,
Line_of_Business : DataCardValue23.Text,
Industry : DataCardValue24.Text ,
Director : DataCardValue25.Text ,
Product : DataCardValue26.Text ,
Engineering_Manager : DataCardValue27.Text,
Metrics_Reporter : DataCardValue28.Text });
Navigate(BrowseScreen1, ScreenTransition.None);Refresh('[dbo].[Sample]')

[Meneghino]

Hi @kullurumanoj

If you are still having issues please get in touch via private message and I will try to see what is going on.

Thanks.

[kullurumanoj]

Was able to figure that out ..Thanks for the help