I’m working on a Go project where I need to update a Google Sheet with data from a string slice (basically a 2D array with strings). I can successfully read data from sheets using the official documentation, but I’m struggling to figure out how to write or modify cell values.
The official Go client library seems really complex and I can’t find clear examples anywhere. I have my data structured as a multi-dimensional string array and I just want to populate a few columns in my spreadsheet.
Has anyone worked with this before? I’m looking for a basic example of how to update cell values in Google Sheets using the V4 API with Go. Even a simple snippet showing how to write data to specific ranges would be super helpful.
Had the same problem when I started using Go’s client library. The trick that fixed it: create a ValueRange struct and convert your 2D string slice to interface{} instead of string. That one detail cost me hours.
Once I got authentication working with service account credentials, the spreadsheets service’s Values.Update method worked fine. Just make sure you use proper range notation (“Sheet1!A1:D5”) and your data dimensions match exactly what you’re writing to. Yeah, the docs are pretty thin, but once you nail the data type conversion, it’s smooth sailing.
The biggest thing that helped me was figuring out the request structure. You’ve got to set ValueInputOption to either “RAW” or “USER_ENTERED” - depends if you want formulas processed or not. I’d go with batchUpdate over single cell updates when you’re hitting multiple cells. Way more reliable. Make sure your 2D string slice matches your target range exactly, or you’ll get dimension mismatch errors. Empty strings in your data will mess things up too, so watch for those. Authentication’s the real pain at first, but once you get that service account JSON working, writing data is pretty easy.
yeah, i dealt with that a while back too. instead of batchUpdate, try spreadsheets.values.update. just make a ValueRange object from your 2D array and call update with your range (like “Sheet1!A1:C10”). authentication can be a pain, but it gets easier after!