运行时使用NSPredicate崩溃的iOS Swift筛选器数组

我有一个细胞模型

struct BeerCellModel: Hashable {

    var beer: Beer

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

    var hashValue: Int {
        return self.beer.id
    }
}

以及

public struct Beer {
    public var abv: String
    public var ibu: String
    public var id: Int
    public var name: String
    public var style: String
    public var ounces: Int
}

现在我有一个数组名' 项目=[BeerCellModel] '上面的单元格模型,我用参数筛选数组 style

let value = ["tuborg", "budwiser", "bira"]
let query = value.map { "SELF.beer.style CONTAINS[cd] \($0)" }.joined(separator: " || ")
let predicate = NSPredicate(format: query)
let results = self.items.filter { predicate.evaluate(with: $0) }

但我会在运行时崩溃

2018-08-08 00:38:01.787170+0530蜂排[3388:401950]*** 由于未捕获的异常“NSUnknownKeyException”,正在终止应用程序, 原因:'[<\u SwiftValue 0x60400064dce0>valueForUndefinedKey:]:此 类不符合密钥啤酒的密钥值编码

数组或谓词中有什么错误?

更新:添加JSON响应 Beer

  {
    "abv": "0.08",
    "ibu": "35",
    "id": 11,
    "name": "Monks Blood",
    "style": "Belgian Dark Ale",
    "ounces": 12
  },
  {
    "abv": "0.07",
    "ibu": "65",
    "id": 10,
    "name": "Brew Free! or Die IPA",
    "style": "American IPA",
    "ounces": 12
  },
  {
    "abv": "0.04",
    "ibu": "17",
    "id": 9,
    "name": "Hell or High Watermelon Wheat",
    "style": "Fruit / Vegetable Beer",
    "ounces": 12
  }