GRDBCipher没有成员插入

Question

您好我在Swift中遇到GRDBCipher问题。当尝试使用记录时，它会给我一个错误类型＆＃34;结构＆＃34;没有成员插入。我也得到更新错误。

struct PointOfInterest {
        var id: Int64?
        var title: String
        var isFavorite: Bool
        var coordinate: CLLocationCoordinate2D
    }

    // snip: turn PointOfInterest into a "record" by adopting the protocols that
    // provide fetching and persistence methods.
    do{
        try dbQueue.inDatabase { db in
            var berlin = PointOfInterest(
                id: nil,
                title: "Berlin",
                isFavorite: false,
                coordinate: CLLocationCoordinate2D(latitude: 52.52437, longitude: 13.41053))

            try berlin.insert(db) //error here
            berlin.id // some value

            berlin.isFavorite = true
            try berlin.update(db) //error here

            // Fetch [PointOfInterest] from SQL
            let pois = try PointOfInterest.fetchAll(db, "SELECT * FROM pointOfInterests")// error on fectchAll
        }
    } catch {
        print("broke")
    }