I found a way round this by using a ‘Choice’ field and dynamically populating it.
Essentially I populate the choice field with the categories I want, I can choose if it is a radio, check or select etc, and then on update/publish of the post I get the selections and save them back to the post.
Using this function you can dynamically populate the choice field: http://www.advancedcustomfields.com/resources/dynamically-populate-a-select-fields-choices/
I then used the save_post function to save the data back to the post. http://www.advancedcustomfields.com/resources/acfsave_post/
/**
* dynamically set options for date select field
* @param array $field
* @return type
* @see http://www.advancedcustomfields.com/resources/dynamically-populate-a-select-fields-choices/
*/
function my_acf_date_field($field) {
//get child categories of category date
$args = array(
'type' => 'post',
'child_of' => 8, //date category parent
'parent' => '',
'orderby' => 'name',
'order' => 'ASC',
'hide_empty' => 0,
'hierarchical' => 1,
'exclude' => '',
'include' => '',
'number' => '',
'taxonomy' => 'category',
'pad_counts' => false
);
//get the child categores
$categories = get_categories($args);
//array of choices to add to field
$choices = array();
/**
* add each category to $choices array
*/
foreach ($categories as $category) {
// var_dump($category);
$id = $category->cat_ID;//set value as category id
$name = $category->cat_name;//label as category name
$choices[$id] = $name;
}
//add choices to field
$field['choices'] = $categories;
return $field;
}
// acf/load_field/name={$field_name} - filter for a specific field based on it's name
add_filter('acf/load_field/name=date', 'my_acf_date_field');
/**
* Save the data to the post
* @param type $post_id
* @return type
* @see http://www.advancedcustomfields.com/resources/acf_save_post/
*/
function my_acf_save_post($post_id) {
// bail early if no ACF data
if (empty($_POST['acf'])) {
return;
}
//array of category id's
$categoryIds = array();
//value of 'date' field is the cat_id
$dateCatId = get_field("date");//http://www.advancedcustomfields.com/resources/get_field/
array_push($categoryIds, $dateCatId);
//set value of category fields onto post
//http://codex.wordpress.org/Function_Reference/wp_set_post_categories
wp_set_post_categories($post_id, $categoryIds);
}
// run before ACF saves the $_POST['acf'] data
//add_action('acf/save_post', 'my_acf_save_post', 1);
// run after ACF saves the $_POST['acf'] data
add_action('acf/save_post', 'my_acf_save_post', 20);
Untitled.png.png
