Patch a multiple value choice column with multiple value combo box with values from list

[medusa3604]

Ok, I think I have taken on something I cannot figure out.

I have a list in SP with Type and Detail columns.

In my custom form for another list I have a dropdown that gets the Type values Distinct.

I have a combobox that depends on the dropdown and gets the Details column.

So far so good.

I can´t figure out how to patch this to a multiple choice column in SP. I keep getting this error:
'Invalid argument type.  Expecting a table value, but of a different schema.'

Im totally lost.

[Drrickryp]

@medusa3604 

Seeing as I never use choice or lookup type columns, II don't speak from experience but i found this possible solution.https://powerusers.microsoft.com/t5/Building-Power-Apps/How-to-Save-Choice-field-value-using-UpdateI... 

[RandyHayes · Accepted solution]

@medusa3604 

If you are doing this in a form, then the update property formula of the DataCard will be:

   ForAll(yourComboBox.SelectedItems, {Value: detailsColumn})

Replacing detailsColumn with the name of the column in your combobox that has the value you will be using for the choice value in your list.

If you are freehanding in a Patch or UpdateIf, then the above formula would be the same except that you will put this in the formula to represent the column value for the column you are needing it for.

I hope this is helpful for you.