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Add a default values for rpc with empty message

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还没有人认领这个 Issue。

评估

难度
5/5
预计耗时
一周以上
新手友好度
35/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
停滞
技术栈
grpc, python

调研方向

issue 中没有确定任何文件或测试。首先定位生成的 Python RPC 方法签名,以及当前对 google.protobuf.Empty 或无字段消息的处理;完成的标准是:无需传入参数即可调用空消息 RPC,同时现有的显式消息调用继续正常工作。

由索引模型根据 Issue 内容生成。

描述

enhancement
The Problem

Sometimes, it is needed to declare RPCs that take no parameter. However, it is not possible in gRPC. In such a situation, it is needed to either create an empty message type, or to use google.protobuf.Empty ( https://stackoverflow.com/questions/29687243/protobuf-rpc-service-method-without-parameters ).

However, this is not convenient for the final user: an empty message need to be created and passed to the method each time. It also makes it necessary to add potentially long imports.

The Ideal Solution

To make this easier, it would be better to add a default value for the parameter containing the request when it is possible. I see two possibilities:

  • Add the default value only for google.protobug.Empty
  • Add the default value for all the messages who have no field at all

I think the second solution would be better as it is common to define empty messages in such situations. I can make a PR if you agree, I already have a working version locally.

The Current Solution

Currently, it is necessary for the user to import by hand from betterproto.lib.std.google.protobuf import Empty or the custom message, which is not convenient.

The feature would turn:

from betterproto.lib.std.google.protobuf import Empty
answer = TestStub().call(Empty())

To something like:

answer = TestStub().call()
主要语言
Python
星标
1.8k
派生
235
PR 合并指标
30 天内没有已合并 PR

环境准备

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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