github-api.go

func main() {
 type item struct {
   Title string
     FieldValues struct {
       Nodes []struct {
         Value string
         ProjectField struct {
           Name string
        }
      }
    } `graphql:"fieldValues(first: 10)"`
  }

  var query struct {
    Node struct {
      ProjectNext struct {
        Items struct {
          Nodes []item
          PageInfo struct {
            EndCursor   githubv4.String
            HasNextPage bool
          }
        } `graphql:"items(first: 100, after: $itemsCursor)"`
      } `graphql:"... on ProjectNext"`
    } `graphql:"node(id: \"[GitHub ProjectのノードID]\")"`
  }
  variables := map[string]interface{}{
    "itemsCursor":  (*githubv4.String)(nil),
  }

  // 認証
  src := oauth2.StaticTokenSource(
    &oauth2.Token{AccessToken: "[GITHUB_ACCESS_TOKEN]"},
  )
  httpClient := oauth2.NewClient(context.Background(), src)
  client := githubv4.NewClient(httpClient)

  // Queryの実行
  // 100個までしか一度に取得できないので、まだタスクがあるなら次のページを取得
  var items []item
  for {
    err := client.Query(context.Background(), &query, variables)
    if err != nil {
      fmt.Println(err)
      return
    }
    items = append(items, query.Node.ProjectNext.Items.Nodes...)
    if !query.Node.ProjectNext.Items.PageInfo.HasNextPage {
      break
    }
    variables["itemsCursor"] = githubv4.NewString(query.Node.ProjectNext.Items.PageInfo.EndCursor)
  }
}