Within a Form I have a "Your Current Department" Picker for the app user to select their department of employment (Sales, Management, etc.). This Picker's selection pulls from the viewModel.

Here is a link to the code on GitHub.

The following two errors on the ProfileFormView inhibit compilation:

1. "Generic struct 'Picker' requires that 'Department' conform to 'Hashable'"

2. "Referencing initializer 'init(_:selection:content:)' on 'Picker' requires that 'Department' conform to 'Hashable'"

struct ProfileFormView: View {

    @Environment(\.colorScheme) var colorScheme
    @Binding var tabSelection: Int
    @EnvironmentObject var vm: EmployeeViewModel
    let hoursWorked = 120...180
    let currentDept = ["Sales","Management","Senior Management","Hospitality","Sanitation","Other"]

    var body: some View {
        NavigationView {
            VStack {
                Form {
                    Section(header: Text("Personal Information:")
                        .foregroundColor(colorScheme == .dark ? Color.white: Color.black)
                        .font(.body)
                        .bold()) {
                            Picker("Hours per Month", selection: $vm.userData.monthlyHoursWorked) {
                                ForEach(hoursWorked, id: \.self) {
                                    Text("\($0)")
                                }}
                            //error is below
                            Picker("Your Current Department", selection: $vm.userData.department) {
                                ForEach(currentDept, id: \.self) {
                                    Text ($0)
                                }
                            }
                        }
                }
            }
            .navigationTitle("Employee Information")
            .toolbar {
                NavigationLink(destination: PayRateView(
                    depts: DeptList.deptList), label: {Text("Pay Charts")
                    })
            }
        }
        .accentColor(Color(.label))
        .navigationViewStyle(StackNavigationViewStyle())
    }
}

The "Department" is a variable within the Employee model:

struct Employee: Identifiable {
    var id = UUID()
    let name: String
    var birthdate: Date
    var hiredate: Date
    var retirementAge: Int
    var department: Department
    var monthlyHoursWorked: Int
    var regularPayRateIncreases: Bool
    var regularPayRateIncreasePercentage: Int
    var regularPayRateIncreaseYearInterval: Int

    private(set) var employmentHistory: [Department]

    init(_ name: String,
         birthdate: Date,
         hiredate: Date,
         retirementAge: Int,
         department: Department = .other("Employee"),
         monthlyHoursWorked: Int,
         regularPayRateIncreases: Bool,
         regularPayRateIncreasePercentage: Int,
         regularPayRateIncreaseYearInterval: Int)
    {
        self.name = name
        self.birthdate = birthdate
        self.hiredate = hiredate
        self.retirementAge = retirementAge
        self.department = department
        self.monthlyHoursWorked = monthlyHoursWorked
        self.regularPayRateIncreases = regularPayRateIncreases
        self.regularPayRateIncreasePercentage = regularPayRateIncreasePercentage
        self.regularPayRateIncreaseYearInterval = regularPayRateIncreaseYearInterval
        self.employmentHistory = []
    }
}

If I add Hashable to this struct, I get the following two errors:

1. "Type 'Employee' does not conform to protocol 'Equatable' "

2. "Type 'Employee' does not conform to protocol 'Hashable' "

Try to add those methods in your struct like so

    static func ==(lhs: Employee, rhs: Employee) -> Bool {
        return lhs.id == rhs.id
    }

    func hash(into hasher: inout Hasher) {
        hasher.combine(id)
    }

and add protocols to your struct Employee accordingly.

struct Employee: Identifiable, Equatable, Hashable

@ygeras

Thank you!

Your suggestions removed the errors in my model, but I still have the two errors in the ProfileFormView:

"Generic struct 'Picker' requires that 'Department' conform to 'Hashable'"

"Referencing initializer 'init(_:selection:content:)' on 'Picker' requires that 'Department' conform to 'Hashable'"