Ich habe schon seit einiger Zeit versucht, einen JSON Deserialiser zu schreiben, konnte aber meinen Fehler nicht finden. Warum sagt mir Newtonsoft, Unexpected token when deserializing object: StartObject
, nach der Deserialisierung?Newtonsoft Converter FromJson - unerwartetes Token
type ThisFails =
{ a : string * string
m : Map<string, string> }
type ThisWorks =
{ y : Map<string, string>
z : string * string }
testCase "failing test - array before object" <| fun _ ->
let res = deserialise<ThisFails> Serialisation.converters
"""{"a":["xyz","zyx"],"m":{}}"""
Assert.Equal("should be eq to res", { a = "xyz", "zyx"; m = Map.empty }, res)
testCase "passing test - array after object" <| fun _ ->
let res = deserialise<ThisWorks> Serialisation.converters
"""{"y":{},"z":["xyz","zyx"]}"""
Assert.Equal("should be eq to res", { y = Map.empty; z = "xyz", "zyx" }, res)
Der Betreff is the TupleArrayConverter.
Die Spur dieses Konverter ist:
reading json [Newtonsoft.Json.FSharp.TupleArrayConverter]
type => System.Tuple`2[System.String,System.String]
value token, pre-deserialise [Newtonsoft.Json.FSharp.TupleArrayConverter]
path => "a[0]"
token_type => String
value token, post-deserialise [Newtonsoft.Json.FSharp.TupleArrayConverter]
path => "a[1]"
token_type => String
value token, pre-deserialise [Newtonsoft.Json.FSharp.TupleArrayConverter]
path => "a[1]"
token_type => String
value token, post-deserialise [Newtonsoft.Json.FSharp.TupleArrayConverter]
path => "a"
token_type => EndArray
after EndArray token, returning [Newtonsoft.Json.FSharp.TupleArrayConverter]
path => "m"
token_type => PropertyName
Im Konverter, ich bin raubend das letzte Zeichen, das Ende Array, wie Sie im Abschluss Fall sehen:
match reader.TokenType with
| JsonToken.EndArray ->
read JsonToken.EndArray |> req |> ignore
acc
Und ich verzehre das StartArray Token am Anfang ...
Also: warum funktioniert dieser Code nicht? (Newtonsoft.Json 6.0.8)
Dies ist der Fehler:
map tests/failing test - array before object: Exception: Newtonsoft.Json.JsonSerializationException: Unexpected token when deserializing object: StartObject. Path 'm', line 1, position 24.
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ResolvePropertyAndCreatorValues (Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Type objectType, IDictionary`2& extensionData) [0x00000] in <filename unknown>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObjectUsingCreatorWithParameters (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.Serialization.ObjectConstructor`1 creator, System.String id) [0x00000] in <filename unknown>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateNewObject (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract objectContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, Newtonsoft.Json.Serialization.JsonProperty containerProperty, System.String id, System.Boolean& createdFromNonDefaultCreator) [0x00000] in <filename unknown>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00000] in <filename unknown>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00000] in <filename unknown>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, Boolean checkAdditionalContent) [0x00000] in <filename unknown>:0 (00:00:00.1500996)
1 tests run: 0 passed, 0 ignored, 0 failed, 1 errored (00:00:00.2482623)
Lass es mich überprüfen! – Henrik
Hoffentlich lief ich gegen die richtige Version (Git-Tag 6.0.8) – FuleSnabel