Reply To: Save total CPT count to ACF field

• MikeD89

• December 6, 2017 at 8:49 pm

Thought id update this thread as I ended up working direct with another developer on this.

He wrote a custom function, which relies on a new ACF field that stores the count data.

I hope it helps somebody else!

function generateInvoiceId($post_id) {
	// bail early if no ACF data
    if(empty($_POST['acf'])){
        return;
    }

	/***************************
	Structure of settings array.

	array(
		[post_type]=>[array(
			[id_field_name]=>[value]
			[starting_id]=>[value]
		)
	)

	The 'id_field_name' is the name of the ID field that you created in admin.
	They MUST be unique so the post type can be determined correctly.

	*************************/

	$settings=array(
		'exporting'=>array(
			'id_field_name'=>'import_id',
			'starting_id'=>1
		),
		'acquisition'=>array(
			'id_field_name'=>'export_id',
			'starting_id'=>1
		)
	);

	$id_field_form=null;
	$id_field_name=null;
	$post_type=null;

	//find which form field is the relavant id field and use it to determine which settings to use
	foreach($_POST['acf'] as $form_name => $field){
		$field_data=get_field_object($form_name);

		foreach($settings as $post_type_setting => $setting){
			if($field_data['name']===$setting['id_field_name']){
				$id_field_form=$form_name;
				$id_field_name=$setting['id_field_name'];
				$post_type=$post_type_setting;
				break 2;
			}
		}
	}

	if($id_field_form===null||$id_field_name===null||$post_type===null||is_numeric($_POST['acf'][$id_field_form])){
		//not the right post type or this is an update
		return;
	}

	//new post save - get last id and increment;
	$last_post=get_posts(array(
		'posts_per_page'   => 1,
		'offset'           => 1,
		'orderby'          => 'date',
		'order'            => 'DESC',
		'post_type'        => $post_type
	));

	$generated_id=null;

	if(count($last_post)>0){
		//Posts have already been created of this type. Retrieve last post id and increment
		$last_post=get_fields(array_pop($last_post));
		$last_id=$last_post[$id_field_name];
		$generated_id=$last_id+1;
	}
	else{
		//This is the first post of the this type. ID will be set to the starting id.
		$generated_id=$settings[$post_type]['starting_id'];
	}

	//set the new id to the form data and exit
	$_POST['acf'][$id_field_form]=$generated_id;
	return true;
}

add_action('acf/save_post', 'generateInvoiceId', 1);