无效操作 - 不匹配的类型 string 和 nil

Question

我正在尝试创建一个连接到 Google Cloud API 的 Go RESTful API。发生了一个问题，描述为：无效操作：req.ParentId != nil（字符串和 nil 类型不匹配）在创建本地 API 之前，我设法编写了一个 Go 模块，该模块可以连接、验证和从 Google Cloud 提取数据。我现在正在将该模块迁移为带有路径的 Restful API。该模块的重点是获取所有当前正在运行的虚拟机的列表。这是将其更改为restful API（有效）之前的模块：package mainimport (    "fmt"    "example.com/compute"    "bytes")func main() {    buf := new(bytes.Buffer)    // Get a message and print it.    r.HandleFunc("/virtualmachines", ListAllInstances)    err := compute.ListAllInstances(buf, "unique-string-id")    if err != nil {        panic(err)    }    fmt.Println(buf.String()) // <======= Print buf contents!}// new file:package compute// [START compute_instances_list_all]import (    "context"    "fmt"    "io"    compute "cloud.google.com/go/compute/apiv1"    "google.golang.org/api/iterator"    computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"    "google.golang.org/protobuf/proto")// listAllInstances prints all instances present in a project, grouped by their zone.func ListAllInstances(w io.Writer, projectID string) error {    // projectID := "your_project_id"    ctx := context.Background()    instancesClient, err := compute.NewInstancesRESTClient(ctx)    if err != nil {        return fmt.Errorf("NewInstancesRESTClient: %v", err)    }    defer instancesClient.Close()    // Use the `MaxResults` parameter to limit the number of results that the API returns per response page.    req := &computepb.AggregatedListInstancesRequest{        Project:    projectID,        MaxResults: proto.Uint32(6),    }    it := instancesClient.AggregatedList(ctx, req)    fmt.Fprintf(w, "Instances found:\n")    // Despite using the `MaxResults` parameter, you don't need to handle the pagination    // yourself. The returned iterator object handles pagination    // automatically, returning separated pages as you iterate over the results.ParentId是罪魁祸首（滚动下方查看完整错误）。我插入的字符串在上面的代码中似乎不起作用。Google Cloud API 正在尝试找出项目的父 ID。如何修复上面的代码？

Answer 1

我有同样的问题，通过降级 1 commit 解决：

 go get google.golang.org/genproto@81c1377

https://github.com/googleapis/go-genproto/commits/main

Answer 2

是您的代码中的错误还是只是在发布中？在出版物中我看到

req := &computepb.AggregatedListInstancesRequest{
        Project:    "unqie-string-id,
        MaxResults: proto.Uint32(16),
    }

但应该是

req := &computepb.AggregatedListInstancesRequest{
        Project:    "unqie-string-id",
        MaxResults: proto.Uint32(16),
    }