Include custom fields in feed

You should be able to use the instant_articles_after_transform_post hook to manipulate the article after the basic transformation is made using the main post body.

Something like:

use Facebook\InstantArticles\Elements\Video;

add_action( 'instant_articles_after_transform_post', function ($ia_post) {
    $instant_article = $ia_post->instant_article;
    $post_id = $ia_post->get_the_id();
    $video_url = get_post_meta( $post_id, 'video_url', true );
    $instant_article->addChild( Video::create()->withURL($video_url) );
} );

Does that work?

Please refer to the Instant Articles SDK documentation:

https://github.com/facebook/facebook-instant-articles-sdk-php/blob/master/docs/QuickStart.md

Hi, thanks for the response, but I’m a bit confused. Isn’t this example from a different plugin than the one I’m referring to?

Hi,

No, that should be right. This is how you do it on v2.0+

There was a big rewrite of the plugin on this version.

Thanks a lot diegoquinteiro! I have to admit I was wrong, I updated the plugin and the above code worked perfectly.
But, is there a way to add a child to the head of the children array?
I tried to use the ‘instant_articles_before_transform_post’ action but it didn’t worked.
I’m just trying to place the video on top of the content if that is possible.
I tried to change the children array but it is set as private.

Oh forgot, problem solved!

How would you add a full YouTube Embed tag? Is there documentation for Video::create() that shows how this can be done? Or can you add it as a paragraph?

Cheers

Hey xscv2314 how did you add the video to the top of the content?
Does a YouTube URL work or do you need a link to an .mp4 file?

Cheers

Also wondering how one might use addChild to add nodes before the_content. xscv2314 – did you get it working?

I was able to add the full Youtube tag with something like this using the SocialEmbed class instead.

use Facebook\InstantArticles\Elements\SocialEmbed;
add_action( 'instant_articles_after_transform_post', function ($ia_post) {
    $instant_article = $ia_post->instant_article;
    $post_id = $ia_post->get_the_id();
    $iframe_string = get_post_meta( $post_id, 'video_embed_code', true );
    preg_match('/src="([^"]+)"/', $iframe_string, $match);
    $video_url = $match[1];
    $instant_article->addChild( SocialEmbed::create()->withSource($video_url) );
} );

However, I’m still trying to get the video to appear before the content.

Thanks jamestylerpatton, let me know if you find a way to get the video above the content.

jkoon
I was able to place the video above the content, but I had to edit one of the plugin files to get it to work, so it’s only a temporary fix until I find a better way.

In the file, fb-instant-articles/class-instant-articles-post.php, I added:
do_action( 'instant_articles_before_article_content', $this );
on line 674, right after
$document = apply_filters( 'instant_articles_parsed_document', $document );.

Also, you have to specify the width and the height when adding the video, so my full functions.php code to add the video is:

use Facebook\InstantArticles\Elements\SocialEmbed;

function incl_video($ia_post) {
	$instant_article = $ia_post->instant_article;
	$post_id = $ia_post->get_the_id();
	$iframe_string = get_post_meta( $post_id, 'video_embed_code', true );
	if($iframe_string){
		preg_match('/src="([^"]+)"/', $iframe_string, $match);
		$video_url = $match[1];
		$instant_article->addChild( SocialEmbed::create()->withSource($video_url)->withWidth(640)->withHeight(390) );
	}
}
add_action( 'instant_articles_before_article_content', 'incl_video' );

hello all, i’m trying to achieve something similar, but when i place code like

instant_article->addChild(Paragraph::create())

in functions.php, something breaks (ie: stuck loading indicator in the insant article metabox). – is functions.php the place where this code should go? and is there something more to this than adding

use Facebook\InstantArticles\Elements\SocialEmbed

?

custom video field not display