异常“ NSInvalidArgumentException”，原因：“-[MedicalDevice setPrice：]：无法识别的选择器已发送到实例0x2818cc3c0”

Question

我刚刚继承了这个应用程序，并且试图在表单中添加一些字段。

我收到此错误-它似乎正在MedicalDevice上调用setPrice方法。

据我所知，我已经为期望的课程加价了……

@objc(MedicalDevice)
public class MedicalDevice: NSManagedObject {

    static let entityName = "MedicalDevice"
    @nonobjc public class func fetchRequest() -> NSFetchRequest<MedicalDevice> {
        return NSFetchRequest<MedicalDevice>(entityName: MedicalDevice.entityName)
    }

    convenience init(context moc: NSManagedObjectContext) {
        self.init(entity: NSEntityDescription.entity(forEntityName: MedicalDevice.entityName, in: moc)!, insertInto: moc)
    }

    @NSManaged public var createdAt: Date?
    @NSManaged public var deviceID: String?
    @NSManaged public var expirationDate: Date?
    @NSManaged public var lotNumber: String?
    @NSManaged public var modelNumber: String?
    @NSManaged public var catalogNumber: String?
    @NSManaged public var deviceDescription: String?
    @NSManaged public var brandName: String?
    @NSManaged public var companyName: String?
    @NSManaged public var quantity: String?
    @NSManaged public var price: String?
    @NSManaged public var location: String?
    @NSManaged public var facilityID: String?
}

addDevice就这样工作-这是引发异常的地方：

func addDevice(for deviceID: String, lotNumber: String, expirationDate: Date, modelNumber: String, catalogNumber: String, description: String, quantity: String, brandName: String, companyName: String, price: String, location: String, facilityID: String) {

    let medicalDevice = MedicalDevice(context: self.persistentContainer.viewContext)
    medicalDevice.createdAt = Date()
    medicalDevice.deviceID = deviceID
    medicalDevice.lotNumber = lotNumber
    medicalDevice.expirationDate = expirationDate
    medicalDevice.modelNumber = modelNumber
    medicalDevice.catalogNumber = catalogNumber
    medicalDevice.deviceDescription = description
    medicalDevice.quantity = quantity
    medicalDevice.brandName = brandName
    medicalDevice.companyName = companyName
    medicalDevice.price = price
    medicalDevice.location = location
    medicalDevice.facilityID = facilityID
    self.saveContext()
}

现在，我没有看到任何setPrice方法（这很有意义，我只是在各个字段中添加了它），但是我也没有看到setX，X是肯定要保存的其他任何字段

可能是什么原因造成的？显然，setPrice是在某个地方被调用的（以某种方式生成？），我猜它不存在。