This patch was authored and released by @tanner0101.
Adds support for validating nested arrays (#2473, #2238, fixes #2158).
Assuming the following User definition:
struct User: Codable {
struct Hobby: Codable {
var title: String
}
var hobbies: [Hobby]
}Validations for User and its nested array of hobbies can be defined like so:
extension User: Validatable {
static func validations(_ validations: inout Validations) {
validations.add(each: "hobbies") { i, hobby in
hobby.add("title", as: String.self, is: .characterSet(.alphanumerics + .whitespaces))
}
}
}Note that the closure receives the items index i. This can be used to dynamically adjust validations depending on index:
validations.add(each: "hobbies") { i, hobby in
// Don't validate first item.
if i != 0 {
hobby.add("title", as: String.self, is: .characterSet(.alphanumerics + .whitespaces))
}
}Also note how this method complements Validations.add(_:) (without the each parameter) for validating nested dictionaries:
struct User: Codable, Validatable {
struct Hobby: Codable {
var title: String
}
var hobby: Hobby
static func validations(_ validations: inout Validations) {
validations.add("hobbies") { hobby in
hobby.add("title", as: String.self, is: .characterSet(.alphanumerics + .whitespaces))
}
}
}