Swift.DecodingError.Context - swift

Question

i am decoding JSON (Decoder) string from URL repsonse as follows and get a get during the decoding process the following error messages:
Error:
typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [_JSONKey(stringValue: "Index 0", intValue: 0), CodingKeys(stringValue: "tags", intValue: nil), _JSONKey(stringValue: "Index 0", intValue: 0)], debugDescription: "Expected to decode String but found a number instead.", underlyingError: nil))
Structure:
struct Wordpress: Codable {
let id: Int?
let date: String?
let date_gmt: String?
let guid: GUID?
let modified: String?
let modified_gmt: String?
let slug: String?
let status: String?
let type: String?
let link: String?
let title: Title?
let content: Content?
let excerpt: Excerpt?
let author: Int?
let featured_media: Int?
let comment_status: String?
let ping_status: String?
let sticky: Bool?
let template: String?
let format: String?
let meta: [String]?
let categories: [Int]?
let tags: [String]?
let _links: Link?
enum CodingKeys: String, CodingKey {
case id = "id"
case date = "date"
case date_gmt = "date_gmt"
case guid = "guid"
case modified = "modified"
case modified_gmt = "modified_gmt"
case slug = "slug"
case status = "status"
case type = "type"
case link = "link"
case title = "title"
case content = "content"
case excerpt = "excerpt"
case author = "author"
case featured_media = "featured_media"
case comment_status = "comment_status"
case ping_status = "ping_status"
case sticky = "sticky"
case template = "template"
case format = "format"
case meta = "meta"
case categories = "categories"
case tags = "tags"
case _links = "_links"
}
}
struct GUID: Codable{
let rendered: String?
}
struct Title: Codable{
let rendered: String?
}
struct Content: Codable{
let rendered: String?
let protected: Bool?
}
struct Excerpt: Codable{
let rendered: String?
let protected: Bool?
}
struct Link: Codable {
let urls: [URLString]?
let collection: [Collection]?
let about: [About]?
let author: [Author]?
let replies: [Replies]?
let versionHistory: [Version]?
let predecessorVersion: [Predecessor]?
let wpFeaturedmedia: [Featured]?
let wpAttachment: [Attachment]?
let wpTerm: [Term]?
let curies: [Curies]?
enum CodingKeys: String, CodingKey {
case urls = "urls"
case collection = "collection"
case about = "about"
case author = "author"
case replies = "replies"
case versionHistory = "version-history"
case predecessorVersion = "predecessor-version"
case wpFeaturedmedia = "wp:featuredmedia"
case wpAttachment = "wp:attachment"
case wpTerm = "wp:term"
case curies = "curies"
}
}
struct About: Codable{
let href : String?
}
struct Author: Codable {
let embeddable: Bool?
let href : String?
}
struct Replies: Codable {
let embeddable: Bool?
let href : String?
}
struct Version: Codable {
let count: Int?
let href : String?
}
struct Predecessor: Codable {
let id: Int?
let href : String?
}
struct Featured: Codable {
let embeddable: Bool?
let href : String?
}
struct Attachment: Codable{
let href : String?
}
struct Term: Codable {
let taxonomy: String?
let embeddable: Bool?
let href: String?
}
struct Curies: Codable {
let name: String?
let href: String?
let templated: Bool?
}
My decode code:
class func path_getPosts(per_page:Int) -> URL {
let s = APIwp.base + APIwp.posts + APIwp.per_page + "\(per_page)"
print(s)
return URL(string: s)!
}
static func getPosts(for per_page: Int, completion: #escaping ([Wordpress], Error?) -> Void) {
taskGetPosts(url: path_getPosts(per_page: per_page), responseType: [Wordpress].self) { (response, error) in
if let response = response {
completion(response, nil)
} else {
completion([], error)
}
}
}
#discardableResult static func taskGetPosts<ResponseType: Decodable>(url: URL, responseType: ResponseType.Type, completion: #escaping (ResponseType?, Error?) -> Void) -> URLSessionDataTask {
let task = URLSession.shared.dataTask(with: url) { (data, response, error)
in
guard let data = data else {
DispatchQueue.main.async {
completion(nil, error)
}
return
}
let decoder = JSONDecoder()
do {
let responseObject = try decoder.decode(ResponseType.self, from: data)
DispatchQueue.main.async { completion(responseObject, nil) }
} catch let jsonErr {
print("Error:=: \(jsonErr)")
DispatchQueue.main.async { completion(nil, error) }
}
}
task.resume()
return task
}

Answer 1

Please read the error message carefully.
It tells you that the first item (_JSONKey(stringValue: "Index 0", intValue: 0)) in the array for key tags (CodingKeys(stringValue: "tags", intValue: nil) in the first item of the root object (_JSONKey(stringValue: "Index 0", intValue: 0) is not a string, it's a number (Expected to decode String but found a number instead).
So tags is probably [Int]