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Dynamically populate a relational select field

  • Hi!

    I have a relational custom field, which shows all post objects from a specific custom post type.

    When I hook using acf_load_field it doesn’t come with choices value.

    This is the code I’m using (When I try this with a simple select, instead of relational, it works!):

    add_filter('acf/load_field/key=field_544ee594ab0d6', 'my_acf_load_field');
    function my_acf_load_field( $field )
    {
    	echo '<pre>';
    	print_r($field);
    	echo '</pre>';
    
        $field['choices'] = array(
            'custom' => 'My Custom Choice'
        );
    
        return $field;
    }

    This is the output of print_r:

    Array
    (
        [key] => field_544ee594ab0d6
        [label] => Paciente
        [name] => paciente
        [_name] => paciente
        [type] => post_object
        [order_no] => 1
        [instructions] => 
        [required] => 1
        [id] => acf-field-paciente
        [class] => post_object
        [conditional_logic] => Array
            (
                [status] => 0
                [rules] => Array
                    (
                        [0] => Array
                            (
                                [field] => field_544ee541ab0d5
                                [operator] => ==
                                [value] => tomografico
                            )
    
                    )
    
                [allorany] => all
            )
    
        [post_type] => Array
            (
                [0] => paciente
            )
    
        [taxonomy] => Array
            (
                [0] => all
            )
    
        [allow_null] => 0
        [multiple] => 0
        [field_group] => 522
    )
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