Sometimes we have to write init(from:) by hand, so let's make this work a little bit easier:
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
// self.name = try container.decode(String.self, forKey: .name)
// Shorthand:
self.name = try container.decode(.name)
// self.nickname = try container.decodeIfPresent(String.self, forKey: .nickname)
// Shorthand:
self.nickname = try container.decodeIfPresent(.nickname)
// self.title = try? container.decode(String.self, forKey: .title)
// Shorthand:
self.title = container[.title]
}When writing init(from:) by hand, we also have to write the annoying CodingKeys. So let's introducing AnyCodingKey, and forget about CodingKeys:
init(from decoder: Decoder) throws {
let container = try decoder.container() // decoder.container(keyedBy: AnyCodingKey.self)
self.name = try container.decode("name")
self.nickname = try container.decoderIfPresent("nickname")
self.title = container["title"]
// Some tricks:
self.camelCasePropertyWithDefaultValue
= container["camel_case_property_with_default_value"] ?? 42
}import PackageDescription
let package = Package(
name: "Example",
dependencies: [
.package(url: "https://github.com/kylinroc/CodableKit.git", from: "0.4.0"),
],
targets: [
.target(name: "Example", dependencies: ["CodableKit"]),
]
)