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Type:
Bug
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Status: Open
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Priority:
Medium
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Resolution: Unresolved
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Component/s: Foundation
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Labels:None
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Radar URL:
description
When using an enum value that is RawRepresentable with String or Int, the json encoded is an an array of alternating keys and values, Instead of a Dictionary.
This bug is first discussed here : https://forums.swift.org/t/json-encoding-decoding-weird-encoding-of-dictionary-with-enum-values
repro
reproduced in Swift 4.1, (not tested in Swift 4.2)
let json = "{\"key\": \"value\"}"
enum Key: String, Codable {
case key
}
let jsonData = Data(json.utf8)
let dataToEncode = [Key.key: "value"]
do {
let decoded = try JSONDecoder().decode([Key: String].self, from: jsonData)
print(decoded)
let encoded = try JSONEncoder().encode(dataToEncode)
print(String(data: encoded, encoding: .utf8)!)
} catch {
print(error)
}
expected
Encode and Decode a Dictionary with the enum value rawValue as the key.
actual
gives the following errors for the decoding part
typeMismatch(Swift.Array<Any>, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Array<Any> but found a dictionary instead.", underlyingError: nil))
give the following result for the encoding part
[ "key", value ]
