II don't want my code to stop when decoding a field I'm decoding is empty

struct WatchProvider: Identifiable, Decodable {
    let id = UUID()
    let link: String?
    let rent: [WatchProviderDetails]?
    let buy: [WatchProviderDetails]?
    let flatrate: [WatchProviderDetails]?
    
    enum CodingKeys: String, CodingKey {
        case link
        case rent
        case buy
        case flatrate
    }
    
    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        link = try container.decodeIfPresent(String.self, forKey: .link)
        rent = try container.decode([WatchProviderDetails].self, forKey: .rent)
        buy = try container.decode([WatchProviderDetails].self, forKey: .buy)
        flatrate = try container.decode([WatchProviderDetails].self, forKey: .buy)
    }
}

So I'm getting data from api and decoding it into this struct. Thing is sometimes rent would be empty, other times, flatrate would be empty, etc.. Problem is though, everytime any field is empty

> sink error: keyNotFound(CodingKeys(stringValue: "rent", intValue: nil), Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "results", intValue: nil), CodingKeys(stringValue: "US", intValue: nil)], debugDescription: "No value associated with key CodingKeys(stringValue: "rent", intValue: nil) ("rent").", underlyingError: nil))

Any help how can I overcome that error, or better ignore it when it isn't there?

A simple solution is to delete init(from decoder:)

If a struct member is declared as optional it remains nil if the corresponding key is missing

struct WatchProvider: Identifiable, Decodable {
    let id = UUID()
    let link: String?
    let rent: [WatchProviderDetails]?
    let buy: [WatchProviderDetails]?
    let flatrate: [WatchProviderDetails]?
    
    enum CodingKeys: String, CodingKey {
        case link, rent, buy, flatrate
    }
}

decodeIfPresent is useful if the struct member is non-optional and you want to assign a default value if the key is missing for example

struct WatchProvider: Identifiable, Decodable {
    let id = UUID()
    let link: String
    let rent: [WatchProviderDetails]
    let buy: [WatchProviderDetails]
    let flatrate: [WatchProviderDetails]
    
    enum CodingKeys: String, CodingKey {
        case link, rent, buy, flatrate
    }
    
    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        link = try container.decodeIfPresent(String.self, forKey: .link) ?? ""
        rent = try container.decodeIfPresent([WatchProviderDetails].self, forKey: .rent) ?? []
        buy = try container.decodeIfPresent([WatchProviderDetails].self, forKey: .buy) ?? []
        flatrate = try container.decodeIfPresent([WatchProviderDetails].self, forKey: .flatrate) ?? []
    }
    
}