Ruby hash of hash is not supported, ArgumentError: Unknown field name 'bar' in initialization map entry.

[anjali-globallogic]

Version: 3.11.4 Language: Ruby

operating system Ubuntu-18.04.4 LTS

Steps to reproduce the behavior: I am implementing a client in Ruby. While passing parameters to server call, I am encountering this issue. Ruby Hash of Hash is not supported by grpc, it's giving ArgumentError: Unknown field name 'bar' in initialization map entry.

In my service_pb.rb file I have:

add_message 'request' do
  ...
  optional :test, :message, 12, 'google.protobuf.Struct'
end

Now I am trying to pass the request params in my client.rb:

params = {xyz: "abc", test: { bar: "296" }}
stub = Message::Stub.new('localhost:9999', :this_channel_is_insecure)
msg = Request.new(params)

while running this I am getting: ArgumentError: Unknown field name 'bar' in initialization map entry.

It should not ask for keys to be present in map entry since keys are dynamic data.

[deannagarcia]

Sorry for the late response. Are you still seeing this error in newer versions of protobuf?

[haberman]

I want to clarify, I think the feature request here is to support hash initialization of struct fields:

Google::Protobuf::Struct.new({foo: "bar"})

I agree this would be nice. The main risk is that this would be backward-incompatible. Currently it is possible to write:

Google::Protobuf::Struct.new({fields: {foo: {string_value: "bar"}}})

If we implemented the feature requested in this issue, the above would have a different meaning. So we would probably need to make this change in a major version.

One thing you can do right now is:

msg = Request.new
msg.test = { bar: "296" }

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