custom-field - Read For Learn

How do I set the default admin sort order for a custom post type to a custom column?

Solution from a cross post over at StackExchange from @birgire: The problem is that you run the clientarea_default_order callback too late. To fix that you only have to change the priority from the default one that’s 10: add_action( ‘pre_get_posts’,’clientarea_default_order’); to the priority of 9: add_action( ‘pre_get_posts’,’clientarea_default_order’, 9 ); But you don’t actually need two pre_get_posts … Read more

Max length of meta_value

Both usermeta.meta_value and postmeta.meta_value are stored as LONGTEXT. Here’s how the MySQL docs describe the size of a LONGTEXT data type: “A TEXT column with a maximum length of 4,294,967,295 or 4GB (232 – 1) characters. The effective maximum length is less if the value contains multi-byte characters. The effective maximum length of LONGTEXT columns … Read more

How to display custom field in woocommerce orders in admin panel?

The code you have provided is incomplete. Not sure if that is the only code you are using to achieve what you want. So, besides first code block which you have provided, bellow I am adding all rest of the code which is required to show the new field on backend in ‘Order Details’ box … Read more

Validating Custom Meta Box Values & Required Fields

The easiest way is to add Javascript validation via the jQuery Validate plugin. Here’s the most basic walkthrough: Near your add_meta_box call, enqueue the jQuery Validate plugin as well as a JS file for your simple script: add_action(‘admin_enqueue_scripts’, ‘add_my_js’); function add_my_js(){ wp_enqueue_script(‘my_validate’, ‘path/to/jquery.validate.min.js’, array(‘jquery’)); wp_enqueue_script(‘my_script_js’, ‘path/to/my_script.js’); } Then in my_script.js include the following: jQuery().ready(function() { … Read more

Where are custom field values stored in the database

From the codex for custom fields: The PostMeta information is stored in a new table, $wpdb->postmeta. This table has four fields: ‘meta_id’ – A unique id for each entry. ‘post_id’ – The ID of the post for this metadata. ‘meta_key’ – The name of the ‘key’. ‘meta_value’ – The value associated with the key. This … Read more

Show Custom Fields in Quick Edit

After adding our custom column, we are ready to expand our Post Quick Edit menu using the quick_edit_custom_box action hook. Note – The quick_edit_custom_box action hook will not fire unless there are custom columns present. That is why we started by adding a custom column. add_action(‘quick_edit_custom_box’, ‘shiba_add_quick_edit’, 10, 2); function shiba_add_quick_edit($column_name, $post_type) { if ($column_name … Read more

Multiple orderby values in WP_Query

@Musa how can we put multiple order value for the fields? I was wondering the same question and I found this : In 4.0, you can now pass an array to WP_Query as the value for orderby. The syntax looks like: $q = new WP_Query( array( ‘orderby’ => array( ‘title’ => ‘DESC’, ‘menu_order’ => ‘ASC’ … Read more

Prevent post from being published if custom fields not filled

As m0r7if3r pointed out, there is no way of preventing a post from being published using the save_post hook, since the by the time that hook is fired, the post is already saved. The following, however, will allow you to revert the status without using wp_insert_post_data and without causing an infinite loop. The following is … Read more

Can wp_query return posts meta in a single request?

By default, WP_Query returns the standard WP_Post objects for the posts being queried. I believe with some clever rewrite and use of the filters given in WP_Query you can add objects to the returned WP_Post objects array. Will this be performant? In my opinion, it will hurt performance more as you will need to join … Read more

Most efficient way to add javascript file to specific post and/or pages?

I think the best balance between efficiency, and using proper wordpress methods for adding javascript would be adding something along these lines to your themes functions.php file. For Example: functions.php: function load_scripts() { global $post; if( is_page() || is_single() ) { switch($post->post_name) // post_name is the post slug which is more consistent for matching to … Read more

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