If you are experiencing an issue where your ACF (Advanced Custom Fields) Gutenberg block is not rendering properly, there are a few possible causes and solutions. One common issue is that the ACF fields are not being properly registered and added to the block’s attributes. To fix this, you can use the register_block_type function to register your block and define its attributes.
Here is an example of how to properly register an ACF Gutenberg block and add its fields to the block’s attributes:
function wpsnippets_register_acf_block() {
if (function_exists('acf_register_block_type')) {
acf_register_block_type(array(
'name' => 'your-block-name',
'title' => __('Your Block Title', 'your-text-domain'),
'description' => __('Description of your block', 'your-text-domain'),
'render_callback' => 'wpsnippets_render_acf_block',
'category' => 'common',
'icon' => 'admin-comments',
'keywords' => array('acf', 'block'),
'supports' => array(
'align' => array('wide', 'full'),
'mode' => false,
'multiple' => true,
),
));
}
}
add_action('acf/init', 'wpsnippets_register_acf_block');
function wpsnippets_render_acf_block($block, $content = '', $is_preview = false) {
// Get the block's attributes
$attributes = $block['data']['attrs'];
// Output your block's HTML using the attributes
echo '<div class="your-block-class">';
echo '<h2>' . $attributes['title'] . '</h2>';
echo '<p>' . $attributes['content'] . '</p>';
echo '</div>';
}
In this code example, we first define a function wpsnippets_register_acf_block that uses the acf_register_block_type function to register our ACF block. We provide various parameters such as the block’s name, title, description, render callback, category, icon, keywords, and supported features.
The render_callback parameter specifies the function that will be called to render the block’s output. In this example, we define the wpsnippets_render_acf_block function as the render callback. This function receives the block’s data, content, and preview mode status as parameters.
Inside the wpsnippets_render_acf_block function, we retrieve the block’s attributes using $block['data']['attrs']. We can then use these attributes to output the HTML for our block.
By properly registering the ACF block and defining the render callback function, you should be able to resolve the issue of your ACF Gutenberg block not rendering.
Examples
Example 1: ACF Gutenberg block not rendering – Missing ACF Plugin
This example demonstrates a situation where an ACF (Advanced Custom Fields) Gutenberg block is not rendering due to the ACF plugin not being installed or activated.
if ( function_exists( 'acf_register_block_type' ) ) {
// Register ACF Gutenberg block
acf_register_block_type( array(
'name' => 'my-custom-block',
'title' => __( 'My Custom Block', 'text-domain' ),
'render_callback' => 'wpsnippets_render_custom_block',
) );
}
function wpsnippets_render_custom_block( $block, $content = '', $is_preview = false ) {
// Render the custom block content
if ( file_exists( get_theme_file_path( 'template-parts/blocks/my-custom-block.php' ) ) ) {
include( get_theme_file_path( 'template-parts/blocks/my-custom-block.php' ) );
}
}
In this code example, we first check if the ACF plugin is active by using the function_exists() function with the acf_register_block_type function as the parameter. If the ACF plugin is active, we proceed to register our custom block using the acf_register_block_type() function. We provide the block name, title, and a render callback function. The render callback function, wpsnippets_render_custom_block(), is responsible for rendering the block content. It includes a template file, my-custom-block.php, which contains the HTML markup for the block.
Example 2: ACF Gutenberg block not rendering – Missing Block Template
This example demonstrates a situation where an ACF Gutenberg block is not rendering due to a missing block template file.
if ( function_exists( 'acf_register_block_type' ) ) {
// Register ACF Gutenberg block
acf_register_block_type( array(
'name' => 'my-custom-block',
'title' => __( 'My Custom Block', 'text-domain' ),
'render_callback' => 'wpsnippets_render_custom_block',
) );
}
function wpsnippets_render_custom_block( $block, $content = '', $is_preview = false ) {
// Render the custom block content
if ( file_exists( get_theme_file_path( 'template-parts/blocks/my-custom-block.php' ) ) ) {
include( get_theme_file_path( 'template-parts/blocks/my-custom-block.php' ) );
} else {
echo 'Block template not found.';
}
}
In this code example, we have the same setup as the previous example, but with an additional check for the existence of the block template file. If the template file is not found, we output a message indicating that the block template is missing.
Example 3: ACF Gutenberg block not rendering – Incorrect Render Callback
This example demonstrates a situation where an ACF Gutenberg block is not rendering due to an incorrect render callback function.
if ( function_exists( 'acf_register_block_type' ) ) {
// Register ACF Gutenberg block
acf_register_block_type( array(
'name' => 'my-custom-block',
'title' => __( 'My Custom Block', 'text-domain' ),
'render_callback' => 'wpsnippets_render_incorrect_block',
) );
}
function wpsnippets_render_custom_block( $block, $content = '', $is_preview = false ) {
// Render the custom block content
if ( file_exists( get_theme_file_path( 'template-parts/blocks/my-custom-block.php' ) ) ) {
include( get_theme_file_path( 'template-parts/blocks/my-custom-block.php' ) );
}
}
function wpsnippets_render_incorrect_block( $block, $content = '', $is_preview = false ) {
// Incorrect render callback function
echo 'Incorrect render callback function.';
}
In this code example, we intentionally provide an incorrect render callback function, wpsnippets_render_incorrect_block(), which does not include the necessary code to render the block content. As a result, the ACF Gutenberg block will not render properly.