I'm stuck. I have json (array of Movies). I'm trying parse it with Codable protocol, and save to Core Data. Problem is that Movie object have array of Genres (array of strings). I created two entities: Movie and Genre (with relation One to Many). Parsing Movie object not have problem, but when I try to parse genres - its not working.
Have any idea?
P.S. Yes I know that genre array not have key "name".
{
"title": "Dawn of the Planet of the Apes",
"image": "https://api.androidhive.info/json/movies/1.jpg",
"rating": 8.3,
"releaseYear": 2014,
"genre": ["Action", "Drama", "Sci-Fi"]
},
{
"title": "District 9",
"image": "https://api.androidhive.info/json/movies/2.jpg",
"rating": 8,
"releaseYear": 2009,
"genre": ["Action", "Sci-Fi", "Thriller"]
}
Movie model:
@objc(Movie)
class Movie: NSManagedObject, Decodable {
@NSManaged var title: String?
@NSManaged var image: String?
@NSManaged var rating: Float
@NSManaged var releaseYear: Int
@NSManaged var genres: Set<Genre>?
enum apiKey: String, CodingKey {
case title
case image
case rating
case releaseYear
case genres = "genre"
}
@nonobjc public class func request() -> NSFetchRequest<Movie> {
return NSFetchRequest<Movie>(entityName: "Movie")
}
// MARK: - Decodable
public required convenience init(from decoder: Decoder) throws {
guard let contextUserInfoKey = CodingUserInfoKey.context,
let manageObjContext = decoder.userInfo[contextUserInfoKey] as? NSManagedObjectContext,
let manageObjMovie = NSEntityDescription.entity(forEntityName: "Movie", in: manageObjContext) else {
fatalError("Error to getting context")
}
self.init(entity: manageObjMovie, insertInto: manageObjContext)
let container = try decoder.container(keyedBy: apiKey.self)
self.title = try container.decodeIfPresent(String.self, forKey: .title)
self.image = try container.decodeIfPresent(String.self, forKey: .image)
self.rating = try container.decodeIfPresent(Float.self, forKey: .rating) ?? 0
self.releaseYear = try container.decodeIfPresent(Int.self, forKey: .releaseYear) ?? 0
self.genres = try container.decodeIfPresent(Set<Genre>.self, forKey: .genres) ?? []
}
}
// MARK: Generated accessors for geonames
extension Movie {
@objc(addGenresObject:)
@NSManaged func addToGenres(_ value: Genre)
@objc(setKeyObject:)
@NSManaged func setKeyObject(_ value: String)
}
Genre model:
@objc(Genre)
class Genre: NSManagedObject, Decodable {
@NSManaged var name: String?
enum apiKey: String, CodingKey {
case name
}
@nonobjc public class func request() -> NSFetchRequest<Genre> {
return NSFetchRequest<Genre>(entityName: "Genre")
}
// MARK: - Decodable
public required convenience init(from decoder: Decoder) throws {
guard let contextUserInfoKey = CodingUserInfoKey.context,
let manageObjContext = decoder.userInfo[contextUserInfoKey] as? NSManagedObjectContext,
let manageObjGenre = NSEntityDescription.entity(forEntityName: "Genre", in: manageObjContext) else {
fatalError("Error to getting context")
}
self.init(entity: manageObjGenre, insertInto: manageObjContext)
let container = try decoder.container(keyedBy: apiKey.self)
self.name = try container.decodeIfPresent(String.self, forKey: .name)
}
}