bug(grpc): Enums with aliases don't work in GRPC

[tusharmath]

Proto File

syntax = "proto3";

package greetings;

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
  repeated OBJECT_TYPE objects = 2;
}

enum OBJECT_TYPE {
  option allow_alias   = true;
  ONE = 0;
  TWO = 1;
  O_NE = 0;
  T_WO = 1;
}

Configuration

schema
  @server(port: 8000, graphiql: true)
  @upstream(baseURL: "...", httpCache: true, batch: {delay: 10})
  @link(src: "./enums.proto", type: Protobuf) {
  query: Query
}

type Query {
  hello(name: JSON): HelloReply!
    @grpc(
      method: "greetings.Greeter.SayHello"
      body: "{{args.name}}"
    )
}

type HelloReply {
  message: String
  objects: [ObjectType]!
}

enum ObjectType {
  ONE
  TWO
}

Actual

ERROR Invalid Configuration
Caused by:
  • expected Enum type [at Query.hello.@grpc.HelloReply.objects]

Expected Should start the server without errors and successfully query the GRPC endpoint.

[tusharmath]

/bounty 100$

[algora-pbc[bot]]

## 💎 $100 bounty • Tailcall Inc.

### Steps to solve: 1. Start working: Comment /attempt #1626 with your implementation plan 2. Submit work: Create a pull request including /claim #1626 in the PR body to claim the bounty 3. Receive payment: 100% of the bounty is received 2-5 days post-reward. Make sure you are eligible for payouts

🙏 Thank you for contributing to tailcallhq/tailcall! 🧐 Checkout our guidelines before you get started.

Attempt	Started (GMT+0)	Solution
🟡 @webbdays	Apr 2, 2024, 10:07:10 PM	WIP

[b4s36t4]

@tusharmath I have doubt, in the grpc schema we have 4 values inside enum but in the graphql we have only two values which is causing this issue, you want to run the server even there is a mismatch between grpc and graphql?

How you want this to be handled?

[ssddOnTop]

kickstart:

from_proto_file function in protobuf.rs converts descriptor to all fields and messages and it does not preserve options in EnumDescriptorProto.

Along with EnumDescriptorProto, there can be options in: DescriptorProto, FieldDescriptorProto, EnumValueDescriptorProto and FileDescriptorProto. So I think we should have some flow that either separately handles options or some kind of map which can be used directly with ProtobufService

[webbdays]

Hi @tusharmath,

I guess the issue will be resolved with maintaining the enum variants order and checking if enum defined in graphql file is subset of enum values defined in proto file. By default, if number is not given, we take defined order. And then compare. /attempt Raised a pull request. Please review. Thanks.

Algora profile	Completed bounties	Tech	Active attempts	Options
@webbdays	1 tailcallhq bounty	Python, Rust, HTML & more		Cancel attempt

[algora-pbc[bot]]

@webbdays: Reminder that in 1 days the bounty will become up for grabs, so please submit a pull request before then 🙏

[webbdays]

@tusharmath the enums ONE, TWO

here: enum ObjectType { ONE TWO }

should be one of the enums ONE, TWO, O_NE, T_WO

here enum OBJECT_TYPE { option allow_alias = true; ONE = 0; TWO = 1; O_NE = 0; T_WO = 1; }

right?

[webbdays]

i mean subset.

[webbdays]

graphql defined enums should be subset of the enums defined in proto files?

[tusharmath]

In a way, basically all unique variants of the enum should be supported for.

[ssddOnTop]

graphql defined enums should be subset of the enums defined in proto files?

if any only if allow_alias is set to true. If it's set to true then all fields of enum in tailcall config must be subset of proto, else it must be equivalent to enum in proto.

[webbdays]

ok. what i am saying is subset handles both cases A is subset to A which is equivalent case. we dont need to check for allow_alias here.

it was being handled in code: i have tried this

syntax = "proto3";

package greetings;

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
  repeated OBJECT_TYPE objects = 2;
}

enum OBJECT_TYPE {
  ONE = 0;
  TWO = 1;
  O_NE = 0;
  T_WO = 1;
}

then tailcall currently raises Invalid configuration error:

ERROR Invalid Configuration
Caused by:
  • enum number '0' has already been used [at Query.hello.@grpc]

[webbdays]

if we set allow_alias option to false and the aliases are there for enum variants then it also throws error.

so what we left to handle is handle if it graphql is subset of proto.

[webbdays]

syntax = "proto3";

package greetings;

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
  repeated OBJECT_TYPE objects = 2;
}

enum OBJECT_TYPE {
  option allow_alias = false;
  ONE = 0;
  TWO = 1;
  O_NE = 0;
  T_WO = 1;
}

error:

ERROR Invalid Configuration
Caused by:
  • enum number '0' has already been used [at Query.hello.@grpc]

[webbdays]

syntax = "proto3";

package greetings;

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
  repeated OBJECT_TYPE objects = 2;
}

enum OBJECT_TYPE {
  option allow_alias = true;
  ONE = 0;
  TWO = 1;
  O_NE = 0;
  T_WO = 1;
}

Error:

ERROR Invalid Configuration
Caused by:
  • expected {"ONE", "TWO"} but found {"ONE", "O_NE", "TWO", "T_WO"} [at Query.hello.@grpc.HelloReply.objects]

in this case, we just need to validate properly. need to check if it is subset or not. like is {"ONE"} subset to {"ONE", "O_NE"}? is {"TWO"} subset to {"TWO", "T_WO"}?

[github-actions[bot]]

Action required: Issue inactive for 30 days. Status update or closure in 7 days.

[github-actions[bot]]

Issue closed after 7 days of inactivity.