struct HistoryView: View {
   @Environment(\.managedObjectContext) private var viewContext
   @EnvironmentObject private var persistenceController: PersistenceController
   let piggy: Piggy

   var body: some View {
     NavigationView {
         if (piggy.transactionArrary.count != 0) {
             List {
                 ForEach(piggy.transactionArray) { item in
                   // view related code
                 }
             }
         }
      }
   }
}