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Post Object Field from Generated PHP

  • I’ve managed to get the code to work, but doesnt’ seem like the post_object type that I’ve created matches the Post Object type from the ACF Field creation admin.

    Here’s the code:

    
    if( function_exists('acf_add_local_field_group') ):
    
    acf_add_local_field_group(array (
    	'key' => 'group_1',
    		'title' => 'My Group',
    		'location' => array (
    			array (
    				array (
    					'param' => 'options_page',
    					'operator' => '==',
    					'value' => 'acf-options',
    				),
    			),
    		),
    	'menu_order' => 0,
    	'position' => 'normal',
    	'style' => 'default',
    	'label_placement' => 'top',
    	'instruction_placement' => 'label',
    	'hide_on_screen' => '',
    	
    ));
    
    acf_add_local_field( array(
    	/* (string) Unique identifier for the field. Must begin with 'field_' */
    		'key' => 'field_1',
    		
    		/* (string) Visible when editing the field value */
    		'label' => 'Sub Title',
    		
    		/* (string) Used to save and load data. Single word, no spaces. Underscores and dashes allowed */
    		'name' => 'sub_title',
    		
    		/* (string) Type of field (text, textarea, image, etc) */
    		'type' => 'post_object',
    
    		'parent' => 'group_1',
    		
    		/* (string) Instructions for authors. Shown when submitting data */
    		'instructions' => '',
    		
    		/* (int) Whether or not the field value is required. Defaults to 0 */
    		'required' => 0,
    		
    		/* (mixed) Conditionally hide or show this field based on other field's values. 
    		Best to use the ACF UI and export to understand the array structure. Defaults to 0 */
    		'conditional_logic' => 0,
    		
    		/* (array) An array of attributes given to the field element */
    		'wrapper' => array (
    			'width' => '',
    			'class' => '',
    			'id' => '',
    		),
    		
    	/* (mixed) A default value used by ACF if no value has yet been saved */
    	'default_value' => '',
    	
    	/* (mixed) Specify an array of post types to filter the available choices. Defaults to '' */
    	'post_type' => 'post',
    	
    	/* (mixed) Specify an array of taxonomies to filter the available choices. Defaults to '' */
    	'taxonomy' => '',
    	
    	/* (bool) Allow a null (blank) value to be selected. Defaults to 0 */
    	'allow_null' => 0,
    	
    	/* (bool) Allow mulitple choices to be selected. Defaults to 0 */
    	'multiple' => 0,
    	
    	/* (string) Specify the type of value returned by get_field(). Defaults to 'object'.
    	Choices of 'object' (Post object) or 'id' (Post ID) */
    	'return_format' => 'object',
    ) );
    
    endif;
    
  • The first one allows multiple selections, the second one does not. Change this to 1

    
    /* (bool) Allow mulitple choices to be selected. Defaults to 0 */
    'multiple' => 0,
    
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