Custom Location Rules – Works Only on Ajax Call

• mister_bee

• August 15, 2013 at 12:07 pm

Hi. First let me say I love this plugin and worth every money for the add-ons!

Ok so I added my own custom location rule as I want my ACF fields to appear when a category or any one of its subcategories is selected.

I added 2 functions, one is the operator and another is the matching rule.

add_filter('acf/location/rule_operators', 'acf_location_rules_operators');
function acf_location_rules_operators( $choices )
{
    $choices['<='] = '<= (post cat only)';
     
    return $choices;
}

and here’s the matching rule

add_filter('acf/location/rule_match/post_category', 'acf_location_rules_match_post_category', 10, 3);
function acf_location_rules_match_post_category( $match, $rule, $options )
{
    $current_cat = $options['post_category']; // array, user selection
    $rule_cat_id = (int) $rule['value']; // numeric, rule
 
    if($rule['operator'] == "<=")
    {
    	$match = false;
    	$match = in_array($rule_cat_id, $current_cat); //check if main cat
    	if (!$match){
    		// check the subcategories instead so first get the subcats
    		$args=array(
    			'child_of'=>$rule_cat_id,
    			'hide_empty'=>0
    		);
    		$subcats = get_categories($args);
    		foreach ($subcats as $subcat){
    			if (in_array($subcat->term_id, $current_cat))
    			{
    				$match = true;
    				break;	
    			}
    		}
    	}    	
    }
 
    return $match;
}

Okay it works wonderfully now. I’ll add a new post and if I select the category or its subcategory the fields will appear.

The problem now is, there are already posts created before this and when I edit them, the ACF fields does not appear. I have to uncheck and check the category to get them appearing.

I am hoping that I don’t have to ask my client to do this though. Is there anything I need to do to my code?

• Elliot

• August 15, 2013 at 2:43 pm

Hi @mister_bee

I’m not sure why your location rule is not matching previously saved posts.

Have you debugged the code to make sure it is running on the page load / matching the correct values?

• mister_bee

• August 15, 2013 at 5:42 pm

hi @elliot, if I just flag $match as true, the ACF fields appears on the page meaning it gets run during page load but somehow, the rule didn’t match.

is there anyway I can see what is the content of the $options array during page load?

• mister_bee

• August 16, 2013 at 3:53 am

during page load, the $options is an array with zero elements. so I modified my code and now it works.

add_filter('acf/location/rule_match/post_category', 'acf_location_rules_match_post_category', 10, 3);
function acf_location_rules_match_post_category( $match, $rule, $options )
{
    $current_cat = $options['post_category']; // array, user selection
    $rule_cat_id = (int) $rule['value']; // numeric, rule

 	global $pagenow;
 	if (count($current_cat)==0 && $pagenow=='post.php'){
		// if we're editing post and not adding a new post
 		$current_cat= wp_get_post_categories($options["post_id"]);	
 	}
 	
    if($rule['operator'] == "<=")
    {
    	$match = false;
    	
		$match = in_array($rule_cat_id, $current_cat); //check if main cat
	
		if (!$match){
			// check the subcategories instead so first get the subcats
			$args=array(
				'child_of'=>$rule_cat_id,
				'hide_empty'=>0
			);
			$subcats = get_categories($args);
			foreach ($subcats as $subcat){
				if (in_array($subcat->term_id, $current_cat))
				{
					$match = true;
					break;	
				}
			}
		} 
    }
    return $match;
}