Wordpress gutenberg editor doesn't display the post custom field

Question

I am trying to get gutenberg block editor to show the post custom field, but it doesn't work!!!

When I go to options (3 little dots on the upper right corner of screen) > preferences > custom field option it asks me to reload the page and then after the page reloads, nothing happens, no custom field shows up and in the preferences it's still unchecked!!!

Tried to find some documentation on this issue, no luck so far!!!

Does anybody know why?
Is this a glitch in the new version of wordpress and gutenberg block editor?

Answer 1

For future reference:

ACF plugin is causing this behavior, so when I got it deactivated, wordpress native custom fields appeared.

So I decided to use ACF instead of native custom fields. I hope this helps anyone who runs into this and clears up some confusion!

Solution

We could use the following solution to bring back wordpress native custom fields:

add_filter("acf/settings/remove_wp_meta_box", '__return_false', 999);

Use this flter hook in your functions.php file of your active theme.

Tested and works seamlessly! ;-)

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Explanations

When you activate ACF plugin, it decides to hide wordpress native custom fields! Super odd!

So here's what happens when you activate ACF plugin:

1- It first sets an option 'remove_wp_meta_box'=> true from its acf.php file.
2- Then, it tries to hide/unset the wordpress native custom fields from its field_group_options.php file, like this:

if ( acf_get_setting( 'remove_wp_meta_box' ) ) {
    unset( $choices['custom_fields'] );
}

3- It also has a filter hook when using acf_get_setting function in its api-helpers.php file.

apply_filters( "acf/settings/{$name}", $value );

We could take advantage of this filter hook to bring back the wordpress native custom fields, like this:

add_filter("acf/settings/remove_wp_meta_box", '__return_false', 999);