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[resolved] Save custom dropdown field. (3 posts)

  1. Luismin
    Member
    Posted 1 year ago #

    Hey there!!

    Well, I have a little problem with my custom meta box. I create a custom post which includes a custom meta field dropdown. The dropdown displays the title of the posts from another custom posts that I want to link with when save. But when I clic on publish the dropdown doesn´t save.

    Here is my code.

    Here I create my custom post:

    function my_custom_post_category_product() {
    	$labels = array(
    		'name'               => _x( 'Categories Products', 'post type general name' ),
    		'singular_name'      => _x( 'Categories Products', 'post type singular name' ),
    		'add_new'            => _x( 'Add New' ),
    		'add_new_item'       => __( 'Add New Categories Products' ),
    		'edit_item'          => __( 'Edit Categories Products' ),
    		'new_item'           => __( 'New Categories Products' ),
    		'all_items'          => __( 'All Categories Products' ),
    		'view_item'          => __( 'View Categories Products' ),
    		'search_items'       => __( 'Search Categories Products' ),
    		'not_found_in_trash' => __( 'No Categories Products found in the Trash' ),
    		'not_found'          => __( 'No Categories Products found' ),
    		'parent_item_colon'  => '',
    		'menu_name'          => 'Categoria Producto'
    	);
    	$args = array(
    		'labels'        => $labels,
    		'description'   => 'Holds our categories specific data',
    		'public'        => true,
    		'menu_position' => 100,
    		'supports'      => array( 'title', 'editor', 'thumbnail', 'excerpt', 'comments' ),
    		'has_archive'   => true,
    		'taxonomies' => array('category'),
    	);
    	register_post_type( 'category_product', $args );
    }
    add_action( 'init', 'my_custom_post_category_product' );
    
    function my_updated_messages_category_product( $messages ) {
    	global $post, $post_ID;
    	$messages['categories'] = array(
    		0 => '',
    		1 => sprintf( __('Categories Products updated. <a href="%s">View Categories Products</a>'), esc_url( get_permalink($post_ID) ) ),
    		2 => __('Custom field updated.'),
    		3 => __('Custom field deleted.'),
    		4 => __('Categories updated.'),
    		5 => isset($_GET['revision']) ? sprintf( __('Categories Products restored to revision from %s'), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
    		6 => sprintf( __('Categories Products published. <a href="%s">View Categories Products</a>'), esc_url( get_permalink($post_ID) ) ),
    		7 => __('Categories Products saved.'),
    		8 => sprintf( __('Categories Products submitted. <a target="_blank" href="%s">Preview Categories Products</a>'), esc_url( add_query_arg( 'preview', 'true', get_permalink($post_ID) ) ) ),
    		9 => sprintf( __('Categories Products scheduled for: <strong>%1$s</strong>. <a target="_blank" href="%2$s">Preview Categories Products</a>'), date_i18n( __( 'M j, Y @ G:i' ), strtotime( $post->post_date ) ), esc_url( get_permalink($post_ID) ) ),
    		10 => sprintf( __('Categories Products draft updated. <a target="_blank" href="%s">Preview Categories Products</a>'), esc_url( add_query_arg( 'preview', 'true', get_permalink($post_ID) ) ) ),
    	);
    	return $messages;
    }
    add_filter( 'post_updated_messages', 'my_updated_messages_category_product' );

    And then the function to create the custom meta box and save the data:

    add_action('add_meta_boxes', 'product_post_options_box',10,2);
    /* saved the data */
    add_action( 'save_post', 'save_product_post_options_box' );
    
    function product_post_options_box($post_type, $post) {
        if ('category_product' == $post_type) //only add to your post type
            add_meta_box('post_info', 'Product Information', 'product_post_info', 'category_product', 'side', 'high');
    }
    
    function product_post_info() {
        global $post;
        /* List the posts*/
        $posts = get_posts( array(
            'post_type'      => array( 'categories' ),
            'posts_per_page' => -1
            )
        );
        //get saved data
        $saved = get_post_meta($post->ID,'_categories',true);
        if (empty($saved))
            $saved = array();
    		//var_dump($saved);
    
        echo '<select name="categories" id="categories" multiple>'.
            '<option value="" selected="selected">Select a post</option>';
        foreach ($posts as $p) {
            $link = get_permalink( $p->ID);
            $selected = (in_array($link,$saved)) ? ' selected="selected"' : '';
            echo '<option'.$selected.' value="'.$link.'">'.get_the_title( $p->ID ).'</option>';
        }
        echo '</select>';
    
        // Use nonce for verification
        wp_nonce_field( plugin_basename( __FILE__ ), 'categories_nonce' );
    
    }
    
    function save_product_post_options_box($post_ID){
        // verify if this is an auto save routine.
        // If it is our form has not been submitted, so we dont want to do anything
        if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
            return;
    
        // First we need to check if the current user is authorised to do this action.
        if ( ! current_user_can( 'edit_post', $post_ID ) )
            return;
    
        // Secondly we need to check if the user intended to change this value.
        if ( ! isset( $_POST['categories_nonce'] ) || ! wp_verify_nonce( $_POST['categories_nonce'], plugin_basename( __FILE__ ) ) )
          return;
    
        // Thirdly check the post type
        if ('categories' != get_post_type($post_ID))
            return;
    
        $mydata =  $_POST['categories'];
    
        // Do something with $mydata
        // either using
        update_post_meta( $post_ID, '_category_product', $mydata, true);
    }

    At this point:

    //get saved data
        $saved = get_post_meta($post->ID,'_categories',true);
        if (empty($saved))
            $saved = array();
    		//var_dump($saved);

    If I show $saved in order to see what it contains it shows the custom posts from WordPress. I have no idea where is the bug. Any idea?

    Note: The dropdown must save multiple options (1 post or more)

    Thanks a lot!

  2. Luismin
    Member
    Posted 1 year ago #

    I solved this problem by changing de code:

    // Add the Meta Box
    function add_custom_meta_box() {
        add_meta_box(
            'custom_meta_box', // $id
            'Product Requirements', // $title
            'show_custom_meta_box', // $callback
            'produktkrav', // $page
            'normal', // $context
            'high'); // $priority
    }
    add_action('add_meta_boxes', 'add_custom_meta_box');
    
        // Field Array
        $prefix = 'custom_';
        $custom_meta_fields = array(  
    
            array(
                'label'=> 'Filter criteria',
                'desc'  => 'Select the filter criteria for this product requirement.',
                'id'    => $prefix.'select',
                'type'  => 'select',
                'options' => array (
                    'one' => array (
                        'label' => 'Miljo- og energikrav',
                        'value' => 'Miljo- og energikrav'
                    ),
                    'two' => array (
                        'label' => 'Tildelingskriterier',
                        'value' => 'Tildelingskriterier'
                    ),
                    'three' => array (
                        'label' => 'Leverandorens',
                        'value' => 'Leverandorens'
                    )
                )
            ),
    		array(
                'label'=> 'Mandatory Requirement',
                'desc'  => 'Check if this product requirement is mandatory.',
                'id'    => $prefix.'checkbox',
                'type'  => 'checkbox'
            ),
    
    		array(
    			'label' => 'Categories',
    			'desc' => 'Related categorie.',
    			'id'    =>  $prefix.'post_id',
    			'type' => 'post_list',
    			'post_type' => array('category_product'),
    )
        );  
    
    	// The Callback
    function show_custom_meta_box() {
    global $custom_meta_fields, $post;
    // Use nonce for verification
    echo '<input type="hidden" name="custom_meta_box_nonce" value="'.wp_create_nonce(basename(__FILE__)).'" />';  
    
        // Begin the field table and loop
        echo '<table class="form-table">';
        foreach ($custom_meta_fields as $field) {
            // get value of this field if it exists for this post
            $meta = get_post_meta($post->ID, $field['id'], true);
            // begin a table row with
            echo '<tr>
                    <th><label for="'.$field['id'].'">'.$field['label'].'</label></th>
                    <td>';
                    switch($field['type']) {
                        // case items will go here 
    
    					// select
    case 'select':
        echo '<select name="'.$field['id'].'" id="'.$field['id'].'">';
        foreach ($field['options'] as $option) {
            echo '<option', $meta == $option['value'] ? ' selected="selected"' : '', ' value="'.$option['value'].'">'.$option['label'].'</option>';
        }
        echo '</select><br /><span class="description">'.$field['desc'].'</span>';
    break;
    
    // checkbox
    case 'checkbox':
        echo '<input type="checkbox" name="'.$field['id'].'" id="'.$field['id'].'" ',$meta ? ' checked="checked"' : '','/>
            <label for="'.$field['id'].'">'.$field['desc'].'</label>';
    break; 
    
    // post_list
    case 'post_list':
    $items = get_posts( array (
        'post_type' => $field['post_type'],
        'posts_per_page' => -1
    ));
        echo '<select name="'.$field['id'].'" id="'.$field['id'].'">
                <option value="">Select One</option>'; // Select One
            foreach($items as $item) {
                echo '<option value="'.$item->ID.'"',$meta == $item->ID ? ' selected="selected"' : '','> '.$item->post_title.'</option>';
            } // end foreach
        echo '</select><br /><span class="description">'.$field['desc'].'</span>';
    break;
                    } //end switch
            echo '</td></tr>';
        } // end foreach
        echo '</table>'; // end table
    }
    
    // Save the Data
    function save_custom_meta($post_id) {
        global $custom_meta_fields;  
    
        // verify nonce
        if (!wp_verify_nonce($_POST['custom_meta_box_nonce'], basename(__FILE__)))
            return $post_id;
        // check autosave
        if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
            return $post_id;
        // check permissions
        if ('page' == $_POST['post_type']) {
            if (!current_user_can('edit_page', $post_id))
                return $post_id;
            } elseif (!current_user_can('edit_post', $post_id)) {
                return $post_id;
        }  
    
        // loop through fields and save the data
        foreach ($custom_meta_fields as $field) {
            $old = get_post_meta($post_id, $field['id'], true);
            $new = $_POST[$field['id']];
            if ($new && $new != $old) {
                update_post_meta($post_id, $field['id'], $new);
            } elseif ('' == $new && $old) {
                delete_post_meta($post_id, $field['id'], $old);
            }
        } // end foreach
    }
    add_action('save_post', 'save_custom_meta');

    But now, another question: How can I display more than one type of post and order by type-post inside the select

  3. Luismin
    Member
    Posted 1 year ago #

    Solved

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