JSONDecoder 一直运行错误，我该如何解决这个问题？上周还在工作

Question

我正在进行 api 调用并尝试使用我的JSONDecoder()，但它一直跳到我的位置。我该如何解决这个问题？或者其他人看到有什么问题吗？

    do{

        print("decoding")
        let decoder = JSONDecoder()
        decoder.keyDecodingStrategy = .convertFromSnakeCase
        let commoditiesList = try decoder.decode([HPPluCodeAdd].self, from: data!)
        print(commoditiesList)

        self.harvestCommodities = commoditiesList
        DispatchQueue.main.async {
            self.AddHarvestPlanPluCodeTable.reloadData()
            print("fin")
        }
    }catch _{
        print("error")
        }

我得到的数据：

[
    {
        "cases_per_week_avg": 0,
        "target": 1200,
        "pounds_per_case": 35,
        "repeat_harvest": true,
        "cases_per_week": "0",
        "lbs_per_week": "0",
        "id": 14,
        "acres": 800,
        "plu_code": 12188,
        "active": true,
        "options": 1,
        "plant_days": 80,
        "plu_code_commodity": "Organic Cabbage",
        "plu_code_variety": "Green",
        "cases_per_pallette": 42,
        "harvest_week_count": 1,
        "pounds_per_acre": 32767
    },
    {
        "cases_per_week_avg": 0,
        "target": 0,
        "pounds_per_case": 20,
        "repeat_harvest": true,
        "cases_per_week": "0",
        "lbs_per_week": "0",
        "id": 20,
        "acres": 800,
        "plu_code": 12187,
        "active": true,
        "options": 1,
        "plant_days": 80,
        "plu_code_commodity": "Organic Broccoli",
        "plu_code_variety": "",
        "cases_per_pallette": 48,
        "harvest_week_count": 1,
        "pounds_per_acre": 16000
    }]

我的结构：

struct HPPluCodeAdd : Decodable{
    var id : Int
    var commodity: String
    var casesPerWeekAvg: Int
    var repeatHarvest: Int
    var casesPerWeek: Double
    var lbsPerWeek :Double
    var acres : Int
    var pluCode : Int
    var active :Bool
    var options: Int
    var plantDays: Int
    var pluCodeCommodity: String
    var pluCodeVariety: String
    var casesPerPalette: Int
    var harvestWeekCount : Int
    var poundsPerAcre: Int
    var poundsPerCase : Int


}

Answer 1

您的模型 HPPluCodeAdd 存在问题，我想，当您为 error 添加正确的 catch 时，您会看到它。

我建议使用 optional，因为根据 JSON，您没有一些键（例如 let commodity: String）。我建议一个基于您的 JSON 的模型（我已经检查过 - 您得到了正确的结果），但您可能需要添加更多键

struct HPPluCodeAdd: Decodable {
    let casesPerWeekAvg, target, poundsPerCase: Int?
    let repeatHarvest: Bool?
    let commodity: String?
    let casesPerWeek, lbsPerWeek: String?
    let id, acres, pluCode: Int?
    let active: Bool?
    let options, plantDays: Int?
    let pluCodeCommodity, pluCodeVariety: String?
    let casesPerPallette, harvestWeekCount, poundsPerAcre: Int?
}