Class 'Google_Auth_AssertionCredentials' not found

[ShelterJames]

Create new Dir

Add composer.json with

{
    "require": {
        "google/apiclient": "^2.0.0@RC"
    }
}

Run composer update - this gets v2.0.0-RC2 currently

Edit index.php

<?

require __DIR__ . '/vendor/autoload.php';


$client = new Google_Client();
$client->setApplicationName("HelloAnalytics");
$analytics = new Google_Service_Analytics($client);

// Read the generated client_secrets.p12 key.
$key = 'xxxxxxxxxxxx';
$cred = new Google_Auth_AssertionCredentials(
    'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxr@developer.gserviceaccount.com',
    array(Google_Service_Analytics::ANALYTICS_READONLY),
    $key
);

This is taken from https://developers.google.com/analytics/devguides/reporting/core/v3/quickstart/service-php

Run php index.php

    Fatal error: Class 'Google_Auth_AssertionCredentials' not found in /Users/xxxxx/tmp/index.php on line 12

I'm guessing PSR Autoload problem, or docs are wrong.

[ShelterJames]

Oh, I've just found https://github.com/google/google-api-php-client/blob/master/UPGRADING.md

So it's the docs at https://developers.google.com/analytics/devguides/reporting/core/v3/quickstart/service-php that are wrong.

[ascalabro]

Google_Auth_AssertionCredentials has been removed in 2.x
The docs seem to be behind and not updated

See UPGRADING.md

[ascalabro]

@ShelterJames I've encountered several issues with 2.x since it's been released.
To prevent delay in development due to bugs, I've switched my composer back to "google/apiclient": "1.*" and all works fine

[ShelterJames]

I've gone back to V1 and got some data out .... so guess issue is https://developers.google.com/analytics/devguides/reporting/core/v3/quickstart/service-php should mention it's V1 of the lib. Anyway, thanks.

[bshaffer]

You are correct that the docs are not up to date with v2, but the docs state to clone the v1-master branch of this library. How could we make this more clear?

We could put a banner in the README: "If you arrived here from developers.google.com, you should be using the v1-branch of this repo"

[ShelterJames]

Ah, I see

git clone -b v1-master

Firstly, sorry if I was a bit harsh. Stupid day yesterday.

I think the reason I missed that the first time is that I was looking for composer setup. I'd seen the Github repo and knew this was an option, so grabbed the version from there. So things I would do:

1. I think the only place https://developers.google.com/analytics/devguides/reporting/core/v3/quickstart/service-php mentions this is in the git command, which I missed as I didn't read the command in detail. I would put a sentence is Step 2 of that page, something like "Note this tutorial applies to V1 of the library - please make sure you check that out from branch v1-master".

2. Ideally, section 2 should mention Composer setup and again be very clear in pointing out to use the version string "1.*". This would involve changing

require_once 'google-api-php-client/src/Google/autoload.php';

in section 3 to have require statements for both composer and direct download, something like:

// If you downloaded directly .... 
require_once 'google-api-php-client/src/Google/autoload.php';
// If you downloaded with composer ....
require_once 'vendor/autoload.php';

with maybe a line at the top saying "Use whichever 'require_once' statement matches your method of download, and remove the other one."

3. The composer setup section in https://github.com/google/google-api-php-client/blob/master/README.md could mention both versions, something like:

composer require google/apiclient:^2.0.0@RC
Note the documentation at developers.google.com refers to V1 of this library. If you want to use the older version, instead use:
composer require google/apiclient:1.*

Thanks,
James

[buley]

Thanks to whomever reported this issue. I just copypasta'd the Analytics Hello World and found myself in similar situations. Path forward was laid out for me in @ShelterJames's link:
https://github.com/google/google-api-php-client/blob/master/UPGRADING.md#google_auth_assertioncredentials-has-been-removed

Anyways, commenting to say that I've been working with this lib for a few years. While the auth tweaks are minimal, I'm finding that the interface has been tremendously simplified for service accounts. This is a welcome change. Thank you @google team.

[bshaffer]

Thank you for y our feedback @buley!