Can't save_post on form submission

• nickfindley

• November 21, 2020 at 9:36 am

I have a front end form that I would like to use to create a new post with custom fields. Here’s the function I use to register the form and save the post:

// functions.php
function dutchtown_poll_form( $args = array() )
{
    $default_args = array(
        'fields'            => array(
            'field_5fb66cffb0492',
            'field_5fb66e2ff4e9d',
            'field_5fb6b393b30dc'
        ),
        'post_id'	    	=> 'new_post',
        'new_post'			=> array(
            'post_type'		=> 'poll_response',
            'post_status'   => 'publish',
            'post_title'    => 'Poll Response',
        ),
        'return'			=> home_url( 'ideas' ),
        'submit_value'		=> 'Submit your poll response'
    );

    $args = wp_parse_args( $args, $default_args );
    
    acf_register_form( $args );
}

function dutchtown_save_poll_response( $post_id )
{
    if ( get_post_type( $post_id ) !== 'poll_response' ) : return; endif;
	if ( is_admin() ) : return; endif;
    
	$post = get_post( $post_id );

	$name = get_field( 'name', $post_id );
    while ( have_rows( 'poll_answer', $post_id ) ) :
        the_row();
    	$answer[] = get_sub_field( 'answer', $post_id );
    endwhile;
}

add_action('acf/save_post', 'dutchtown_save_poll_response' );

Then I call the form like so in my page template:

// page-form.php

acf_form_head();
get_header();

$args = array(
    'id' => 'poll-category',
);

dutchtown_poll_form( $args );   // register form
acf_form( $poll_category );     // display form

Everything is as expected except that the post is not created on submission, so I assume something is going wrong at acf/save_post.

I do see the following notice when I turn on debug mode:

Notice: Undefined offset: 1 in /app/public/wp-content/plugins/advanced-custom-fields-pro/includes/api/api-helpers.php on line 4636
Call Stack
# Time Memory Function Location
1 0.0004 420920 {main}( ) …/index.php:0
2 0.0004 421192 require( ‘/app/public/wp-blog-header.php’ ) …/index.php:17
3 0.4261 15923208 require_once( ‘/app/public/wp-includes/template-loader.php’ ) …/wp-blog-header.php:19
4 0.4281 16009528 include( ‘/app/public/wp-content/themes/itaska/page-poll.php’ ) …/template-loader.php:106
5 0.4281 16009528 acf_form_head( ) …/page-poll.php:12
6 0.4281 16009528 acf_form_front->enqueue_form( ) …/form-front.php:624
7 0.4281 16009528 acf_form_front->check_submit_form( ) …/form-front.php:340
8 0.4281 16009528 acf_decrypt( ) …/form-front.php:379

Line 12 on page-poll.php is where I call acf_form_head();

• nickfindley

• November 22, 2020 at 3:23 am

I think I got it. Instead of

dutchtown_poll_form( $args ); // register form
acf_form( $poll_category ); // display form

I’ve set dutchtown_poll_form() to just return the registration values:

$args = dutchtown_poll_form( $args ); // returns values rather than registering
acf_form( $args );