Get post ID in variable in Grid Builder Visual Composer - php

Question

I’m trying to get some custom fields inside my custom grid builder. I have added some extra taxonomy and would like to add custom data to display. I’ve read your article here: https://kb.wpbakery.com/docs/developers-how-tos/adding-custom-shortcode-to-grid-builder/ and when implementing it, I’m getting a problem when trying to get the id of the current post ID. I know the code is as follows:
add_shortcode( 'vc_post_id', 'vc_post_id_render' );
function vc_post_id_render() {
return '<h2>{{ post_data:ID }}</h2>'; // usage of template variable post_data with argument "ID"
}
The thing is that the {{ post_data:ID }} cannot be saved to a variable to later get the post and play with it as such:
$post_id = '{{ post_data:ID }}';
$post = get_post($post_id);
as it will fail. Could you please tell me how to get the current post ID as a variable so I can show custom data on the grid?
Thank you very much.

Answer 1

Ok, here what I'm thinking. In my scenario, I have a custom field called price.
So I was able to show the price by using
{{ post_data:price }}
This. But when I was trying to assign it to a variable, it failed. When I var_dump the variable it gives me (21) characters for every time. So I thought there must be invisible characters. so I
echo bin2hex($price)
The result was 7b7b20706f73745f646174613a7072696365207d7d
And after ASCII to text conversion, it became this
{{ post_data:price }}
Then I realized it. Oh silly me. These are template tags. Like in smarty or angular. They injected values once the page has loaded. So PHP doesn't have a chance get value because everything happening on the client side.

Answer 2

you need to create vc_gitem_template_attribute_YOUR_ATTRIBUTE and there you can take id. like this:
add_filter( 'vc_gitem_template_attribute_producer_logo', 'vc_gitem_template_attribute_producer_logo', 10, 2 );
function vc_gitem_template_attribute_producer_logo( $value, $data ) {
extract( array_merge( array(
'post' => null,
'data' => '',
), $data ) );
$termini = get_the_terms( $post->ID, 'producer' );
$logo = get_field('prlogo', $termini[0]);
$image = '<img class="img-prod" src="' . $logo . '">';
return $image;
}
and render
add_shortcode( 'producer_logo', 'vc_producer_logo_render' );
function vc_producer_logo_render($atts, $content, $tag) {
return '{{producer_logo}}';
}