Using SwiftData where Transaction has [Transfer] children and Transfer has one Transaction parent

Table of Transfers with TextField binding as Binding(transfer).value works fine but a Table of Transactions using Binding(transaction).transfers[index].value makes it impossible to enter more than one digit before the TextField resets

Is there a problem with Binding? Why might a number be treated as text?

Show your code for the text field.

If you use the value argument for the text field, you should be able to bind the text field to a number, such as in the following code:

@State private var billAmount: Double = 0

TextField("Bill Amount", value: $billAmount, formatter: .number)

When you use the value argument, you also have to supply a formatter. See also the following Hacking with Swift article:

https://www.hackingwithswift.com/quick-start/swiftui/how-to-format-a-textfield-for-numbers

This was the problematic code

TextField("Debit",
  value: Bindable(transaction).transfers[index].debitAmount,
  format: .number.precision(.fractionLength(2)).sign(strategy: .never)
  )

I read that one shouldn't use depth or index in a binding so I changed the code which now looks like:

if let transfer = transaction.transfers.first(where: {$0.account?.name == activeAccount.name}) { 
  TextField("Debit",
  value: Bindable(transfer).debitAmount,
  format: .number.precision(.fractionLength(2)).sign(strategy: .never)
  )

(this happens inside a TableColumn whose rows are Transaction objects)

Also now using Bindable since pairedTransfer is a SwiftData object, not sure if that is the right way.