Google APIs Ruby Client (gem) Error `uninitialized constant Google::APIClient::UploadIO`

Question

This has certainly had me baffled for a couple hours. I've bootstrapped my application as detailed by Baugues to the point that authentication via OAuth2 works and I'm just testing things out in the `session#create` (callback) action. Here's some code: ``` class SessionsController < ApplicationController def create @auth = request.env["omniauth.auth"] @token = @auth["credentials"]["token"] client = Google::APIClient.new client.authorization.access_token = @token service = client.discovered_api('drive', 'v1') file_content = Google::APIClient::UploadIO.new("foo", "text/plain") # @result = client.execute( # :api_method => service.files.get, # :parameters => { 'id' => 1 }, # :headers => {'Content-Type' => 'application/json'}) end end ``` Upon authenticating, the above logic is executed in the `callback` method - which for the purpose of this crude test renders out `create.html.erb`. I've commented out the `@result` instance variable that's just echoed out into the view. However, `Google::…

Accepted Answer

Check your Gemfile.lock to see which version of google-api-client it is actually using. When I went through the same steps, it looks like it settled on 0.3.0 by default, likely due to google-omniauth-plugin being a little behind with its dependency. 0.3.0 doesn't have media support in it.

Trying changing your Gemfile to

```
gem 'google-api-client', '~> 0.4.3', :require => 'google/api_client'
```

and rerun 'bundle install' to force it to use the more recent version.

Google APIs Ruby Client (gem) Error `uninitialized constant Google::APIClient::UploadIO`

Solution

Problem