go data_error ai_generated true

rpc error: code = AlreadyExists desc = 邮箱为 '[email protected]' 的用户已存在

rpc error: code = AlreadyExists desc = user with email '[email protected]' already exists

ID: go/grpc-already-exists-duplicate-resource

其他格式: JSON · Markdown 中文 · English
80%修复率
88%置信度
0证据数
2025-02-08首次发现

版本兼容性

版本状态引入弃用备注
1.0+ active — — —

根因分析

服务端因唯一约束（邮箱、ID 等）被违反而拒绝创建。通常由不带幂等键的重试引起。

English

The server rejected a create because a unique constraint (email, ID, etc.) was violated. Often caused by retries without idempotency keys.

generic

解决方案

  1. 90% 成功率 
    md := metadata.Pairs("idempotency-key", uuid.NewString())
ctx := metadata.NewOutgoingContext(ctx, md)
_, err := client.CreateUser(ctx, req)
  2. 85% 成功率 
    if status.Code(err) == codes.AlreadyExists {
  existing, _ := client.GetUser(ctx, &pb.GetUserReq{Email: req.Email})
  return existing, nil
}

无效尝试

常见但无效的做法:

  1. 70% 失败

    The existing resource may differ from the intended one; silently accepting hides data bugs

  2. 85% 失败

    Creates duplicate logical entities and violates business rules