使用 SWIFT CodingKeys 错误解码 JSON

问：

我有以下数据模型，我正在尝试将 JSON 从 API 解码到其中。

struct Data: Identifiable, Codable {
    var id =  UUID()
    let count: Count
    let risk: Risk
    let updatedAt: String
    
    enum CodingKeys: String, CodingKey {
        case count = "Count"
        case risk = "Risk"
        case updatedAt
    }
}

struct Count: Codable {
    let grassPollen: Int
    let treePollen: Int
    let weedPollen: Int

    enum CodingKeys: String, CodingKey {
        case grassPollen = "grass_pollen"
        case treePollen = "tree_pollen"
        case weedPollen = "weed_pollen"
    }
}

struct Risk: Codable {
    let grassPollen: String
    let treePollen: String
    let weedPollen: String

    enum CodingKeys: String, CodingKey {
        case grassPollen = "grass_pollen"
        case treePollen = "tree_pollen"
        case weedPollen = "weed_pollen"
    }
}

The JSON data I am tring to decode into the structure is as follows. 

{ “message”： “成功”， “纬度”：12， “液化天然气”：77， “数据”：[ { “计数”：{ “grass_pollen”：51， “tree_pollen”：34， “weed_pollen”：26 }, “风险”：{ “grass_pollen”： “中等”， “tree_pollen”： “低”， “weed_pollen”： “中等” }, “updatedAt”： “2023-06-10T13：57：17.000Z” } ] }

I am getting the following error when the decode takes place. 
> 
> keyNotFound(CodingKeys(stringValue: "count", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: \"count\", intValue: nil) (\"count\").", underlyingError: nil))
>

I know the model has to have the same names etc. But I have been looking at this for ages and can't see what is wrong. I am just learning swift and am definitely a novice with JSON. 

So am I doing or missing something stupid? 





I have tried various versions of renaming the code and taking the COdingKeys out completely. If I change the coding key "Count" to something else it reflects that in the decode error, but despite trying various options. I'm stuck