The JSON value could not be converted to Amazon.CodePipeline.ArtifactLocationType

Description

DefaultLambdaJsonSerializer fails to decode payload coming from CodePipeline, specifically $['CodePipeline.job'].data.inputArtifacts[0].location.type to Amazon.CodePipeline.ArtifactLocationType

Reproduction Steps

Define Lambda handler with type of Codepipeline payload

    public class CodePipelineEvent
    {
        [JsonPropertyName("CodePipeline.job")]
        public Amazon.CodePipeline.Model.Job job { get; set; }
    }
    public Task FunctionHandler(CodePipelineInput input, ILambdaContext context) { ... }

then test with an actual payload.

Logs

Error converting the Lambda event JSON payload to type BenchmarkingLoader.CodePipelineInput: The JSON value could not be converted to Amazon.CodePipeline.ArtifactLocationType. Path: $['CodePipeline.job'].data.inputArtifacts[0].location.type | LineNumber: 0 | BytePositionInLine: 258.: JsonSerializerException
   at Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer.Deserialize[T](Stream requestStream)
   at lambda_method(Closure , Stream , Stream , LambdaContextInternal )

   at System.Text.Json.ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(Type propertyType)
   at System.Text.Json.JsonPropertyInfoNotNullable`4.OnRead(ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.JsonPropertyInfo.Read(JsonTokenType tokenType, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.JsonSerializer.ReadCore(JsonSerializerOptions options, Utf8JsonReader& reader, ReadStack& readStack)
   at System.Text.Json.JsonSerializer.ReadCore(Type returnType, JsonSerializerOptions options, Utf8JsonReader& reader)
   at System.Text.Json.JsonSerializer.ParseCore(ReadOnlySpan`1 utf8Json, Type returnType, JsonSerializerOptions options)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](ReadOnlySpan`1 utf8Json, JsonSerializerOptions options)
   at Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer.Deserialize[T](Stream requestStream)

Environment

    <PackageReference Include="Amazon.Lambda.Core" Version="1.1.0" />
    <PackageReference Include="Amazon.Lambda.Serialization.SystemTextJson" Version="2.0.1" />
    <PackageReference Include="AWSSDK.CodePipeline" Version="3.5.1.5" />
    <PackageReference Include="AWSSDK.S3" Version="3.5.5.2" />

Lambda

Resolution

---

This is a 🐛 bug-report

[ashishdhingra]

Hi @ingun37,

The SDK Model class ArtifactLocationType is auto-generated. Hence, I do not see it to be fixed in near future. Basically its the problem with the CodePipeline returning string but model class expecting it of a certain type. Hence the problem with the serialization process from JSON. Unfortunately, these types of constant classes cannot be represented in JSON. The workaround as mentioned earlier, is to write custom class (which you implemented) and/or write custom JsonConverter.

Thanks, Ashish

[github-actions[bot]]

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