Golang google sheets API V4 - Write/Update example? - go

Question

Trying to write a simple three column table ([][]string) with Go, but can't.
The quick start guide is very nice, I now can read sheets, but there no any example of how to write data to a sheet, maybe it is trivial, but not for me it seems.
The Golang library for my brains is just too complicated to figure out.
And there not a single example I could google...
This C# example very looks close, but I am not sure I clearly understand C#

Answer 1

Well after some tryouts, there is an answer. Everything is same as in https://developers.google.com/sheets/quickstart/go Just changes in the main function
func write() {
ctx := context.Background()
b, err := ioutil.ReadFile("./Google_Sheets_API_Quickstart/client_secret.json")
if err != nil {
log.Fatalf("Unable to read client secret file: %v", err)
}
// If modifying these scopes, delete your previously saved credentials
// at ~/.credentials/sheets.googleapis.com-go-quickstart.json
config, err := google.ConfigFromJSON(b, "https://www.googleapis.com/auth/spreadsheets")
if err != nil {
log.Fatalf("Unable to parse client secret file to config: %v", err)
}
client := getClient(ctx, config)
srv, err := sheets.New(client)
if err != nil {
log.Fatalf("Unable to retrieve Sheets Client %v", err)
}
spreadsheetId := "YOUR SPREADSHEET ID"
writeRange := "A1"
var vr sheets.ValueRange
myval := []interface{}{"One", "Two", "Three"}
vr.Values = append(vr.Values, myval)
_, err = srv.Spreadsheets.Values.Update(spreadsheetId, writeRange, &vr).ValueInputOption("RAW").Do()
if err != nil {
log.Fatalf("Unable to retrieve data from sheet. %v", err)
}
}

Answer 2

Well if you are looking for Service Account based authentication, then the following worked for me.
Download the client secret file for service account from https://console.developers.google.com
import (
"fmt"
"golang.org/x/net/context"
"google.golang.org/api/option"
"google.golang.org/api/sheets/v4"
"log"
)
const (
client_secret_path = "./credentials/client_secret.json"
)
func NewSpreadsheetService() (*SpreadsheetService, error) {
// Service account based oauth2 two legged integration
ctx := context.Background()
srv, err := sheets.NewService(ctx, option.WithCredentialsFile(client_secret_path), option.WithScopes(sheets.SpreadsheetsScope))
if err != nil {
log.Fatalf("Unable to retrieve Sheets Client %v", err)
}
c := &SpreadsheetService{
service: srv,
}
return c, nil
}
func (s *SpreadsheetService) WriteToSpreadsheet(object *SpreadsheetPushRequest) error {
var vr sheets.ValueRange
vr.Values = append(vr.Values, object.Values)
res, err := s.service.Spreadsheets.Values.Append(object.SpreadsheetId, object.Range, &vr).ValueInputOption("RAW").Do()
fmt.Println("spreadsheet push ", res)
if err != nil {
fmt.Println("Unable to update data to sheet ", err)
}
return err
}
type SpreadsheetPushRequest struct {
SpreadsheetId string `json:"spreadsheet_id"`
Range string `json:"range"`
Values []interface{} `json:"values"`
}

Answer 3

change the scope in the quickstart example from spreadsheets.readonly to spreadsheets for r/w access
here is the write snippet:
writeRange := "A1" // or "sheet1:A1" if you have a different sheet
values := []interface{}{"It worked!"}
var vr sheets.ValueRange
vr.Values = append(vr.Values,values
_, err = srv.Spreadsheets.Values.Update(spreadsheetId,writeRange,&vr).ValueInputOption("RAW").Do()
and that should work: