Creating ad – Preview throws 404

Greetings.
I debugged the fields and i found the culprit. The “Year” field. As soon as i changed the field the form got unstucked…
…but now i have another problem.
I had a custom add-preview.php based on the template’s single.php but it throws a time out error. As soon as i remove the call from functions, it works but shows under the single.php from the plugin.

I have this call from functions.php

add_action("adverts_template_load", "previa_aviso");
function previa_aviso( $tpl ) {
    // $tpl is an absolute path to a file, for example
    // /home/simpliko/public_html/wp-content/plugins/wpadverts/templates/list.php
    
    $basename = basename( $tpl );
    // $basename is just a filename for example list.php
     
     if( $basename == "add-preview.php" ) {
        // return path to list.php file in custom-list-template directory
        return dirname( __FILE__ ) . "/add-preview.php";
     } else {
        return $tpl;
     }
}

This is my add-preview.php

<?php get_header(); ?>
<main id="singular type-page">
<article class="block container "id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<?php get_template_part( 'entry' ); ?>
<?php //the_content(); ?>
<?php include apply_filters( "adverts_template_load", get_template_directory_uri().'/single-advert.php' ); ?>

<hr/>

<form action="" method="post" style="display:inline">
    <input type="hidden" name="_adverts_action" value="" />
    <input type="hidden" name="_post_id" id="_post_id" value="<?php echo esc_attr($post_id) ?>" />
    <input type="hidden" name="_post_id_nonce" id="_post_id_nonce" value="<?php echo esc_attr($post_id_nonce) ?>" />
    <input type="submit" value="<?php _e("Edit Listing", "wpadverts") ?>" style="font-size:1.2em" class="adverts-cancel-unload" />
</form>

<form action="" method="post" style="display:inline">
    <input type="hidden" name="_adverts_action" value="save" />
    <input type="hidden" name="_post_id" id="_post_id" value="<?php echo esc_attr($post_id) ?>" />
    <input type="hidden" name="_post_id_nonce" id="_post_id_nonce" value="<?php echo esc_attr($post_id_nonce) ?>" />
    <input type="submit" value="<?php _e("Publish Listing", "wpadverts") ?>" style="font-size:1.2em" class="adverts-cancel-unload" />
</form>    
<?php if ( comments_open() && ! post_password_required() ) { comments_template( '', true ); } ?>
<?php endwhile; endif; ?>
    </article>    
<footer class="footer">
<?php get_template_part( 'nav', 'below-single' ); ?>
</footer>
</main>
<?php get_sidebar(); ?>
<?php get_footer(); ?>

And the error that throws me is this

I could remove the call from the functions.php to the template’s add-preview.php but that view doesn’t show the custom fields (but they appear in the final ad).

First part… https://imgur.com/9no2OU4
Second part, the end of that same screen https://imgur.com/RYFgw3Y

I’m not sure if making an instance of single advert in another layout might work might work but i’m lost in order to see the custom fields on the preview.

Greetings. Well It now changed a problem with another.

Now doesn’t get hung up but throws me the following error:

View post on imgur.com

Since i commented the mentioned lines and subsequent closings i debugged the single-advert file commenting such lines as well but with no result. However the single advert is working fine under those commented lines when viewing any ad.

Line 6 In add-preview is at this moment:
<?php include apply_filters( "adverts_template_load",'/single-advert.php' ); ?>

I copied as is from the template:
<?php include apply_filters( "adverts_template_load", ADVERTS_PATH . 'templates/single.php' ); ?>
And throws me the default view (no custom fields).

I remove the adverts path:
<?php include apply_filters( "adverts_template_load", '/single.php' ); ?>
Same result, default layout.

But if I remove/rename single-advert.php to ensure that the file is being called
Throws me the same.

And adding this:
<?php include apply_filters( "adverts_template_load",get_template_directory_uri().'/single-advert.php' ); ?>
becomes the same result.

Basically behaves like the file is not there when it is.

The finction that calls add-preview.php is this one

add_action("adverts_template_load", "previa_aviso");
function previa_aviso( $tpl ) {
    // $tpl is an absolute path to a file, for example
    // /home/simpliko/public_html/wp-content/plugins/wpadverts/templates/list.php
    
    $basename = basename( $tpl );
    // $basename is just a filename for example list.php
     
     if( $basename == "add-preview.php" ) {
        // return path to list.php file in custom-list-template directory
        return dirname( __FILE__ ) . "/add-preview.php";
     } else {
        return $tpl;
     }
}

Looks like i fell on a Dead End.

Greetings. Well at first, it threw me Null as you said.

<?php $file = apply_filters( "adverts_template_load", "" );
var_dump( $file );
include $file; ?>  

Then i removed the file destination, leaving only the quotes and threw me this:

View post on imgur.com

So i did a lot of attempts and i had to rewrite the previa_aviso()function like this:

add_action("adverts_template_load", "previa_aviso");
function previa_aviso( $route ) {
    // $tpl is an absolute path to a file, for example
    // /home/simpliko/public_html/wp-content/plugins/wpadverts/templates/list.php
    
    $basename = basename( $route );
    // $basename is just a filename for example list.php
     
     if( $basename == "add-preview.php" ) {
        // return path to list.php file in custom-list-template directory
         $route = get_template_directory()."/add-ad-preview.php";
        return  $route;
     } else {
        return $route;
     }
}

And then the redirection went correctly.

<?php 
$file = apply_filters( "adverts_template_load", get_template_directory() . '/single-demo.php' );
var_dump( $file );
include $file; ?> 

And i had to do an instance of the single advert without the post_id() variable set.

View post on imgur.com

I have to debug some info but what i needed to do was set.

Thanks for the help and leads.