[Resolved] Populate Title based on 2 fields, one which is a post reference to another CPT

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[toddU]

I am trying to auto-populate a post title based on 2 custom fields. One of the fields is a Number field and the other is a Post Reference field to another CPT.

CPT is "flight"
Number field is "flight-number"
Post Reference field is "airline" that is connected to CPT "Airlines"

Example of what I'm trying to do:
Create new "flight"; enter "2216" for flight number; select "Southwest Airlines" for airline; click Update
Expect to see for the post title "Southwest Airlines 2216" ....or even better would be "WN 2216"

Note: The "WN" is a custom field in "Airlines" that has been entered for Southwest Airlines. It's the standard 2-letter code for Southwest Airlines in the aviation industry. In CPT "Airlines", this 2 letter code is the field "airline-code".

So far, the only code I can get to work can use only ONE custom field. In this case, the flight-number field.

// Auto Generate Title for Flight
add_filter( 'wp_insert_post_data' , 'set_auto_title_flight_fn' , '99', 2 );

function set_auto_title_flight_fn( $data, $postarr )
{
if( ($data['post_type'] == 'flight') && ($data['post_status'] != 'auto-draft') ) {

// get the value from the field
$field_value = $postarr['wpcf']['flight-number'];

//Updates the post title to the new value
$data['post_title'] = $field_value ;
}
return $data; // Returns the modified data.
}
// End Generation

Any suggestions on how to go about adding a second field that is a Post Reference field (Airline)? And preferably ... instead of "Airline", use "airline-code" from the CPT "Airlines" that's related through the Post Reference relationship "Airline"???

[Waqar Supporter Languages: English (English ) Timezone: Asia/Karachi (GMT+05:00)]

Hi,

Thank you for contacting us and I'd be happy to assist.

For the post reference field, the selected post's ID is saved as a custom field value.

Once you'll have the ID of the selected airline post, you can easily get value from any of its custom fields, including the "airline-code" field.
( ref: https://toolset.com/documentation/customizing-sites-using-php/functions/ )

Example:

// Auto Generate Title for Flight
add_filter( 'wp_insert_post_data' , 'set_auto_title_flight_fn' , '99', 2 );

function set_auto_title_flight_fn( $data, $postarr )
{
	if( ($data['post_type'] == 'flight') && ($data['post_status'] != 'auto-draft') ) {

		// get the value from the "flight-number" field
		$flight_number = $postarr['wpcf']['flight-number'];

		// get the value from the "airline" field
		$airline_post_id = $postarr['wpcf']['airline'];

		// get the value from the "airline-code" field
		$airline_code = types_render_field("airline-code", array("item" => $airline_post_id));

		//Updates the post title to the new value
		$data['post_title'] = $airline_code.' '.$flight_number ;
	}
	return $data; // Returns the modified data.
}
// End Generation

Note: Please make sure to update the field slugs, as used on your website.

I hope this helps and let me know if you need any further assistance around this.

regards,
Waqar

[toddU]

Works perfectly. Thank you so much for your help!

My issue is resolved now. Thank you!