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[英]typeMismatch(Swift.Dictionary<Swift.String, Any>,
[英]typeMismatch(Swift.Dictionary<Swift.String, Any> debugDescription: "Expected to decode Dictionary<String, Any> but found an array instead."
现在我面临这个错误
“[UserOrderHistory]”类型的值没有成员“orderlist”
我的 JSON :
{
"OrderList": [
{
"orderId": 16976,
"userId": 4905,
"pickupdate": "2018-09-23",
},
{
"orderId": 52,
"userId": 4905,
"pickupdate": "2018-08-07",
},
],
"TotalOrder": 2
}
我的可解码模型类:
class UserOrderHistory: Object, Decodable {
var orderlist: [OrderList]?
var TotalO = RealmOptional<Int>()
enum CodingKeys: String, CodingKey {
case orderlist = "OrderList"
case TotalO = "TotalOrder"
}
convenience required init(from decoder: Decoder) throws {
self.init()
let container = try decoder.container(keyedBy: CodingKeys.self)
self.orderlist = try container.decodeIfPresent(OrderList.self, forKey: .orderlist)
self.TotalO.value = try container.decodeIfPresent(Int.self, forKey: .TotalO)
}
required init() {
super.init()
}
required init(value: Any, schema: RLMSchema) {
super.init(value: value, schema: schema)
}
required init(realm: RLMRealm, schema: RLMObjectSchema) {
super.init(realm: realm, schema: schema)
}
}
class OrderList: Object, Decodable{
var orderId = RealmOptional<Int>()
var userId = RealmOptional<Int>()
@objc dynamic var pickupdate: String? = nil
enum CatCodingKeys: String, CodingKey {
case orderId
case userId
case pickupdate
}
convenience required init(from decoder: Decoder) throws {
self.init()
let container = try decoder.container(keyedBy: CatCodingKeys.self)
self.orderId.value = try container.decodeIfPresent(Int.self, forKey: .orderId)
self.userId.value = try container.decodeIfPresent(Int.self, forKey: .userId)
self.pickupdate = try container.decodeIfPresent(String.self, forKey: .pickupdate)
}
required init() {
super.init()
}
required init(value: Any, schema: RLMSchema) {
super.init(value: value, schema: schema)
}
required init(realm: RLMRealm, schema: RLMObjectSchema) {
super.init(realm: realm, schema: schema)
}
}
将服务器端数据解码为 Realm 兼容:
let decoder = JSONDecoder()
do {
let orders = try decoder.decode(Array<UserOrderHistory>.self, from: data)
try? realm!.write {
realm?.add(orders.orderlist!)
}
}catch {
print(error)
}
问题出在哪儿。
- 我该如何解决这个问题。
- 有没有其他简单的方法可以解析这种类型的 json 以使用 decodeable.json 。
在上面提到了错误。
OrderList 是一个array
。 您需要更改UserOrderHistory
类中的变量orderList
:
var orderlist: [OrderList]?
只保留这一行,删除Array
:
let orders = try decoder.decode([UserOrderHistory].self, from: data)
到 :
let orders = try decoder.decode(UserOrderHistory.self, from: data)
下面的 json 对象只对应 UserOrderHistory 的一个实例:
{
"OrderList": [
{
"orderId": 16976,
"userId": 4905,
"pickupdate": "2018-09-23",
},
{
"orderId": 52,
"userId": 4905,
"pickupdate": "2018-08-07",
},
],
"TotalOrder": 2
}
因此,使用以下内容进行解码就足够了:
let orders = try decoder.decode(UserOrderHistory.self, from: data)
您正试图按照我所看到的方式从对象中解码数组,但这会失败。
您可以尝试使用Array<UserOrderHistory>.self
而不是UserOrderHistory.self
在您的UserOrderHistory
类中,
var orderlist: [OrderList]?
所以代码应该看起来像,
let decoder = JSONDecoder()
do {
let orders = try decoder.decode(Array<UserOrderHistory>.self, from: data)
try? realm!.write {
realm?.add(orders.orderlist!)
}
}catch {
print(error)
}
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