Help with patch

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Posted on by Community Power Pla... Microsoft Employee

I'm struggling with patch.

I have a SPO list and a canvas app form.

User1 has completed PartA, I've used deep linking to send User2 an email to direct them to the same item.

But when I use submitform function it creates a new item in SPO.

I understand I need to use Patch, but need help with putting the code together please.

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Ben-Western 77 on at

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Hi @Anonymous ,

To Patch() the syntax is as follows:

//For a new row Patch(datasource, default(datasource), {item: "content"}) //Updating an existing row Patch(datasource, gallery1.selected, {item: "content"})

Patch Example: https://www.youtube.com/watch?v=yS6mTRlmuls
Microsoft Docs: https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-patch

Hope this helps!

Regards,

Benjamin Western | Automation Specialist
NextStep Creations

Taking your PowerApps Skill the NextStep

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Community Power Pla... Microsoft Employee on at

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Hi @Ben-Western
Thanks, still getting used to this.
If I want to update the fields found in Form1_8 what would the syntax be like this, as i'm not viewing the existing item form a gallery, rather its from an email that User2 has received?

Patch(ListName, gallery1.selected, //Not sure what I put here {item: "content"}),//again not sure what I put here

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Ben-Western 77 on at

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Patch(ListName, gallery1.selected, //Not sure what I put here {item: "content"}),//again not sure what I put here

So for you gallery1.selected will be whatever the "item" of your form is ( this is the item that is used to populate the form)

{item: "content"} is broken down into Column Name and Value
So for name it would be {name: "ben"} if I wanted to patch name and gender it would be {name: "ben", gender: "male"}

Hope this helps!

Regards,

Benjamin Western | Automation Specialist
NextStep Creations

Taking your PowerApps Skill the NextStep

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Community Power Pla... Microsoft Employee on at

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Hi @Ben-Western
For Form1_8 my items property points to Defaults(ListName) but if i type in Defaults(ListName) it then creates a new record.

If I understand correctly and as I want to patch the whole form, i.e. Form1_8 the {item: "content"} would be something like this which i don't think will work:

Patch(ListName, Defaults(ListName),{item:Form1_8});

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WarrenBelz 156,456 Most Valuable Professional on at

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Hi @Anonymous ,
Going back to your original post, SubmitForm will only create a new record when form's Mode is FormMode.New, however back to your Patch you are correct that Defaults(ListName) will create a new record in Patch - you need to tell Patch which item to update.
So assuming you are doing this from a button not on the form and the Item of the Form is GalleryName.Selected, your Patch could be (substituting the field names and your form control values - note that you only need to update the fields that may change)
Patch( ListName, {ID:GalleryName.Selected.ID}, { FieldName1:Value1, FieldName2:Value2, FieldName3:Value3 //and so on for the rest } }

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Community Power Pla... Microsoft Employee on at

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HI @WarrenBelz
I ended up using a similar set up i had previously used.
I used the SubmitForm on this screen, but I have now set my Item property of the form to VarRecord, it writes back to the same item.
I heard someone say don't over think it... I should have realised it would work.
Thanks for your response

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