No value associated with key CodingKeys

[ljd1bg]

• [x] I have read the documentation.

Describe the bug Fails to decode a key that is present (but only after the first time).

DecodingError
      ▿ keyNotFound : 2 elements
        - .0 : CodingKeys(stringValue: "time_zone", intValue: nil)
        ▿ .1 : Context
          - codingPath : 0 elements
          - debugDescription : "No value associated with key CodingKeys(stringValue: \"time_zone\", intValue: nil) (\"time_zone\")."
          - underlyingError : nil

But this is the response (always the same of course):

{
  "id" : "12345-6789-0",
  "opening_times" : {
    "twentyfourseven" : true
  },
  "coordinates" : {
    "longitude" : "9.028339",
    "latitude" : "48.926502"
  },
  "postal_code" : "71739",
  "time_zone" : "Europe\/Berlin"
}

Here is my model:

@Codable
@CodingKeys(.snake_case)
public struct LocationDetails {
    public let id: String
    public let timeZone: String
    public let postalCode: String

    @CodedIn("coordinates")
    @CodedBy(ValueCoder<Double>())
    public let latitude: Double

    @CodedIn("coordinates")
    @CodedBy(ValueCoder<Double>())
    public let longitude: Double

    @CodedIn("opening_times")
    @Default([])
    public let regularHours: [RegularHours]

}

@Codable
@CodingKeys(.snake_case)
public struct RegularHours {
    public let weekday: Int
    public let periodBegin: String
    public let periodEnd: String
}

To Reproduce Steps to reproduce the behavior:

1. Fetch data from an endpoint first time
2. Everything parses correctly, everything is populated:

   LocationDetails(id: "12345-6789-0", timeZone: "Europe/Berlin", postalCode: "71739", latitude: 48.926502, longitude: 9.028339, regularHours: [])

3. Fetch data from the same endpoint again and I get the error mentioned. "No value associated with key CodingKeys(stringValue: \"time_zone\", intValue: nil) (\"time_zone\")."

Expected behavior I expect to correctly parse the model everytime.

Screenshots

Expanded macro:

Environment (please complete the following information, remove ones not applicable):

• OS: macOS
• Version 14.4.1 (23E224)
• Xcode 15.3 (15E204a)
• Swift 5.9

Additional context The macro looks fine, and I thought it might have something to do with time_zone string, but I commented it out and it gave me the same error (only after the first time) for postal_code as well.

[ljd1bg]

I've tried this:

public struct LocationDetails: Decodable {
    public let id: String
    public let time_zone: String
    public let postal_code: String
}

And it still fails after the first time... I'm very confused 😕

[soumyamahunt]

Have you tried just decoding the JSON string without introducing the endpoint? This seems more like a datapoint issue.

[ljd1bg]

Seems that was the case... strange, thanks! :)