nixzhu
commented
6 years ago Baby can not infer all the Any? type and data which is a array with different type object in it.
You can modify the output struct as follow:
- Specify the type of
limit,transform,columnIndex,collapseandorder. - Create a
MyDataenum to wrap thedata's object (It's a little bit complicated).
Such as:
enum DecodingError: Error {
case typeMismatch
}
enum MyData: Codable {
case string(String)
case double(Double)
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
if let x = try? container.decode(String.self) {
self = .string(x)
return
}
if let x = try? container.decode(Double.self) {
self = .double(x)
return
}
throw DecodingError.typeMismatch
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
switch self {
case .string(let x):
try container.encode(x)
case .double(let x):
try container.encode(x)
}
}
}
struct Aluminum: Codable {
struct Dataset: Codable {
let id: Int
let datasetCode: String
let databaseCode: String
let name: String
let description: String
let refreshedAt: Date
let newestAvailableDate: Date
let oldestAvailableDate: Date
let columnNames: [String]
let frequency: String
let type: String
let premium: Bool
let limit: Int?
let transform: Int?
let columnIndex: Int?
let startDate: Date
let endDate: Date
let data: [[MyData]]
let collapse: Int?
let order: Int?
let databaseId: Int
private enum CodingKeys: String, CodingKey {
case id
case datasetCode = "dataset_code"
case databaseCode = "database_code"
case name
case description
case refreshedAt = "refreshed_at"
case newestAvailableDate = "newest_available_date"
case oldestAvailableDate = "oldest_available_date"
case columnNames = "column_names"
case frequency
case type
case premium
case limit
case transform
case columnIndex = "column_index"
case startDate = "start_date"
case endDate = "end_date"
case data
case collapse
case order
case databaseId = "database_id"
}
}
let dataset: Dataset
}Baby can not guarantee that it is always correct, but it can save your time to create the base struct.
I am getting the error that the struct does not conform to protocol encodable or decodable.
JSON String {"dataset":{"id":19704762,"dataset_code":"AB_AL","database_code":"LME","name":"Aluminium Asian Benchmark Prices","description":"LME Asian Benchmark Prices in US$ per tonne","refreshed_at":"2017-09-26T07:05:23.154Z","newest_available_date":"2017-09-25","oldest_available_date":"2015-02-11","column_names":["Date","Value"],"frequency":"daily","type":"Time 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