WooCommerce – Add all upsells of a product to the cart via custom link — May 31, 2016
WooCommerce – enable free shipping only if product class is found in cart. — May 24, 2016
WooCommerce – Remove product data tabs and hook content in sequence instead — May 10, 2016
WooCommerce – Change number of displayed upsells on product pages — May 6, 2016
Showing quantity inputs in WooCommerce loops — April 21, 2016
Github to WordPress.org deploy script — November 26, 2015

Github to WordPress.org deploy script

Today I polished, documented, and open sourced a bash script I’ve been using to do plugin deployments from Github to WordPress.org (plus I wanted an excuse to use the new WordPress.com desktop app which is awesome by the way). It’s based on code Barry Kooij sent me a while back. You can find it here:

https://github.com/mikejolley/github-to-wordpress-deploy-script

It handles Github tagging, removing junk files, and SVN tagging with minimal effort. It also has a quick checklist to stop you forgetting to set things in the readme.txt like the stable version (I’ve been guilty of forgetting this in the past).

Once downloaded to your machine, the script requires a Github access token, and a few edits to tell it which plugin you’re deploying.

After you’ve added the details specific to your project, you simply need to open it’s parent directory in terminal, and run the command:

sh release.sh

It then prompts you for a version, branch, and handles the deployment process.

demo

The above demo is from a release of WP Job Manager I did today showing it working nicely. Hope it’s useful!

Debugging “unexpected token” in WooCommerce 2.4+ — November 12, 2015

Debugging “unexpected token” in WooCommerce 2.4+

When the WooCommerce checkout is processed it requires that gateways return an array (which is then converted into JSON) telling the checkout whether or not it was successful. It’s been this way since v1. Here is a basic example from the PayPal gateway:

return array(
    'result'   => 'success',
    'redirect' => $paypal_request->get_request_url( $order, $this->testmode )
);

The above for example returns a successful response and tells the checkout to redirect the user to the URL provided.

In 2.4+ this was made more strict in that the response must be valid JSON. Anything else in the response (such as HTML, notices or whitespace) will invalidate this JSON and you may see an error along the lines of:

SyntaxError: Unexpected token

WooThemes own gateways have all been tested for 2.4, however, we’ve seen some less-supported gateways break due to returning invalid content.

I’ve seen a few vocal users complaining about this recently on the forums (some even feeling the need to attack me personally, thanks guys) and thought it best to post a few steps on how you can narrow down the issue.

First off its always best to rule out your plugins and theme by disabling them, even though a lot of users seem to ignore this step. It is only temporary and helps narrow down the issue. Much better than shouting at me on WordPress.org.

Lets assume this does not narrow down the issue for a moment. How would you know if content is being output? The answer is in your browser console.

Lets simulate an error. In the paypal gateway, just before the array is returned I’ll add:

trigger_error( 'Uh oh' );

This triggers the error as expected:

2015-11-12 at 16.29

Now lets try to debug this like someone who does not know where the error is coming from.

In Chrome, go to View > Developer > Javascript Console whilst viewing the checkout.

Now trigger the error again.

After the error is shown, in the console go to the Network tab and click XHR:

2015-11-12 at 16.31

In the list you’re see one which looks like this: ?wc-ajax=checkout. Click on that and go to the response tab:

2015-11-12 at 16.32

Notice in my above example, there is the notice. This invalidates the JSON.

A valid JSON response {starts and ends with a bracket} – if there is an error, white space or content before or after those brackets, that is your issue.

In some cases the error will be obvious and allow you to patch or disable the cause.

Hopefully that helps.