How to mutate the value in storage?

Question

let contract = Invoice {
                origin: from.clone(),
                to: to.clone(),
                amount,
                status: false,
                id: 0,
                msg: msg.clone(),
            };

            let mut invoice_vec: Vec<Invoice<T::AccountId, T::AccountId, BalanceOf<T>>> = Vec::new();
            invoice_vec.push(contract);


            // Save in storage the sender and the invoices
            <InvoiceSender<T>>::insert(from.clone(), &invoice_vec);

Above I do have a struct and I put it into an array and then I store it as a value.

It is very difficult for me to mutate the value in storage. Let's assume I would like to change the status from false to true if the id is equal to 17

if(id == 17){
<InvoiceSender<T>>::try_mutate(from.clone(), .....
}

Can you help me complete the above line of code?

Answer 1

InvoiceSender::<T>::mutate(&from, |invoices| 
    invoices.iter_mut().filter(|i| i.id == 17).for_each(|i| {
        i.status = true;
    });
)

This should achieve what you want.