Creating a new field type from the users table

• jamesnic

• September 3, 2013 at 11:57 pm

Hi. iv been knocking my head repeatable to try get this to work. Iv found this plugin amamazing! an absolute peach. But alas i am not rather confussed and stuck.

What im trying to do is create a new field type that is a select field that contains all the users from the wp-user table. So far so good! the trick is i would like to assign those users a value from a your normal select field.

The form lives on the option page, and uses a repeater field.

The custom “New field” pulls in the users just fine. but does not update when assigning them a vaule.

The normal field updates perfectly.

I cant seem to create the logic from a custom select field to link to normal select field.

Basicly the new field type does not save?

where am i going wrong

below is the code im using

<?php

class acf_field_all_users extends acf_field
{
	// vars
	var $settings, // will hold info such as dir / path
		$defaults; // will hold default field options

	/*
	*  __construct
	*
	*  Set name / label needed for actions / filters
	*
	*  @since	3.6
	*  @date	23/01/13
	*/

	function __construct()
	{
		// vars
		$this->name = 'All Users';
		$this->label = __('All Users');
		$this->category = __("Basic",'acf'); // Basic, Content, Choice, etc
		$this->defaults = array(
			// add default here to merge into your field.
			// This makes life easy when creating the field options as you don't need to use any if( isset('') ) logic. eg:
			//'preview_size' => 'thumbnail'
		);

		// do not delete!
    parent::__construct();

    // settings
		$this->settings = array(
			'path' => apply_filters('acf/helpers/get_path', __FILE__),
			'dir' => apply_filters('acf/helpers/get_dir', __FILE__),
			'version' => '1.0.0'
		);

	}

	/*
	*  create_options()
	*
	*  Create extra options for your field. This is rendered when editing a field.
	*  The value of $field['name'] can be used (like bellow) to save extra data to the $field
	*
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$field	- an array holding all the field's data
	*/

	function create_options($field)
	{
		// defaults?
		/*
		$field = array_merge($this->defaults, $field);
		*/

		// key is needed in the field names to correctly save the data
		$key = $field['name'];

		// Create Field Options HTML
		?>
<tr class="field_option field_option_<?php echo $this->name; ?>">
	<td class="label">
		<label><?php _e("Preview Size", 'acf'); ?></label>
		<p class="description"><?php _e("Thumbnail is advised", 'acf'); ?></p>
	</td>
	<td>
		<?php

		do_action('acf/create_field', array(
			'type'    =>  'radio',
			'name'    =>  'fields[' . $key . '][preview_size]',
			'value'   =>  $field['preview_size'],
			'layout'  =>  'horizontal',
			'choices' =>  array(
				'thumbnail' => __('Thumbnail'),
				'something_else' => __('Something Else'),
			)
		));

		?>
	</td>
</tr>
		<?php

	}

	/*
	*  create_field()
	*
	*  Create the HTML interface for your field
	*
	*  @param	$field - an array holding all the field's data
	*
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*/

	function create_field( $field )
	{

		
		global $wpdb;

		// get the wordpress users
		$wp_user_search = $wpdb->get_results("SELECT * FROM $wpdb->users ORDER BY display_name");

		$choices = array();
		 $blogusers = get_users('role=subscriber');
		    foreach ($blogusers as $user) {
		       // echo '<li>' . $user->user_email . '</li>';
		    	var_dump($user);
			$user_id = (int) $user->ID;
			$display_name  = stripslashes($user->display_name);
			$choices[$user_id] = $display_name;

		    }

		$field['choices'] = $choices;

		// defaults
		$field['value'] = isset($field['value']) ? $field['value'] : array();
		$field['multiple'] = isset($field['multiple']) ? $field['multiple'] : false;
		$field['allow_null'] = isset($field['allow_null']) ? $field['allow_null'] : false;
		$field['optgroup'] = isset($field['optgroup']) ? $field['optgroup'] : false;
		var_dump($field);
		// no choices
		if(empty($field['choices']))
		{
			echo '<p>' . __("No choices to choose from",'acf') . '</p>';
			return false;
		}

		// multiple select
		$multiple = '';
		if($field['multiple'] == '1')
		{
			$multiple = ' multiple="multiple" size="5" ';
			$field['name'] .= '[]';
		}

		// html
		echo '<select id="' . $field['name'] . '" class="' . $field['class'] . '" name="' . $field['name'] . '" ' . $multiple . ' >';

		// null
		if($field['allow_null'] == '1')
		{
			echo '<option value="null"> - Select - </option>';
		}

		// loop through values and add them as options
		foreach($field['choices'] as $key => $value)
		{

			
			if($field['optgroup'])
			{
	
				// this select is grouped with optgroup
				echo '<optgroup label="'.$key.'">';
				if($value)
				{
					foreach($value as $id => $label)
					{
						$selected = '';

						/***************
						*
						*	
						*
						*	selects here
						*
						*	
						*
						*
						*
						*	
						*
						*
						*
						*
						*
						*
						*
						********************/

						if(is_array($field['value']) && in_array($id, $field['value']))
						{
							// 2. If the value is an array (multiple select), loop through values and check if it is selected
							$selected = 'selected="selected"';
						}
						else
						{
							// 3. this is not a multiple select, just check normaly
							if($id == $field['value'])
							{
								$selected = 'selected="selected"';
							}
						}
						echo '<option value="'.$id.'" '.$selected.'>'.$label.'</option>';
					}
				}
				echo '</optgroup>';
			}
			else
			{
				$selected = '';
				if(is_array($field['value']) && in_array($key, $field['value']))
				{
					// 2. If the value is an array (multiple select), loop through values and check if it is selected
					
					$selected = 'selected="selected"';
				}
				else
				{

					// 3. this is not a multiple select, just check normaly
					var_dump($field['value']);
					if($key == $field['value'])
					{

						$selected = 'selected="selected"';
					}
				}
				echo '<option value="'.$key.'" '.$selected.'>'.$value.'</option>';
			}
		}

		echo '</select>';

	}

	/*
	*  input_admin_enqueue_scripts()
	*
	*  This action is called in the admin_enqueue_scripts action on the edit screen where your field is created.
	*  Use this action to add css + javascript to assist your create_field() action.
	*
	*  $info	http://codex.wordpress.org/Plugin_API/Action_Reference/admin_enqueue_scripts
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*/

	function input_admin_enqueue_scripts()
	{
		// Note: This function can be removed if not used

		// register acf scripts
		wp_register_script('acf-input-all-users', $this->settings['dir'] . 'js/input.js', array('acf-input'), $this->settings['version']);
		wp_register_style('acf-input-all-users', $this->settings['dir'] . 'css/input.css', array('acf-input'), $this->settings['version']);

		// scripts
		wp_enqueue_script(array(
			'acf-input-{{field_name}}',
		));

		// styles
		wp_enqueue_style(array(
			'acf-input-{{field_name}}',
		));

	}

	/*
	*  input_admin_head()
	*
	*  This action is called in the admin_head action on the edit screen where your field is created.
	*  Use this action to add css and javascript to assist your create_field() action.
	*
	*  @info	http://codex.wordpress.org/Plugin_API/Action_Reference/admin_head
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*/

	function input_admin_head()
	{
		// Note: This function can be removed if not used
	}

	/*
	*  field_group_admin_enqueue_scripts()
	*
	*  This action is called in the admin_enqueue_scripts action on the edit screen where your field is edited.
	*  Use this action to add css + javascript to assist your create_field_options() action.
	*
	*  $info	http://codex.wordpress.org/Plugin_API/Action_Reference/admin_enqueue_scripts
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*/

	function field_group_admin_enqueue_scripts()
	{
		// Note: This function can be removed if not used
	}

	/*
	*  field_group_admin_head()
	*
	*  This action is called in the admin_head action on the edit screen where your field is edited.
	*  Use this action to add css and javascript to assist your create_field_options() action.
	*
	*  @info	http://codex.wordpress.org/Plugin_API/Action_Reference/admin_head
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*/

	function field_group_admin_head()
	{
		// Note: This function can be removed if not used
	}

	/*
	*  load_value()
	*
	*  This filter is appied to the $value after it is loaded from the db
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value - the value found in the database
	*  @param	$post_id - the $post_id from which the value was loaded from
	*  @param	$field - the field array holding all the field options
	*
	*  @return	$value - the value to be saved in te database
	*/

	function load_value($value, $post_id, $field)
	{
		// Note: This function can be removed if not used

		return $value;
	}

	/*
	*  update_value()
	*
	*  This filter is appied to the $value before it is updated in the db
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value - the value which will be saved in the database
	*  @param	$post_id - the $post_id of which the value will be saved
	*  @param	$field - the field array holding all the field options
	*
	*  @return	$value - the modified value
	*/

	function update_value($value, $post_id, $field)
	{
		// Note: This function can be removed if not used
		return $value;
	}

	/*
	*  format_value()
	*
	*  This filter is appied to the $value after it is loaded from the db and before it is passed to the create_field action
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value	- the value which was loaded from the database
	*  @param	$post_id - the $post_id from which the value was loaded
	*  @param	$field	- the field array holding all the field options
	*
	*  @return	$value	- the modified value
	*/

	function format_value($value, $post_id, $field)
	{
		// defaults?
		/*
		$field = array_merge($this->defaults, $field);
		*/

		// perhaps use $field['preview_size'] to alter the $value?

		// Note: This function can be removed if not used
		return $value;
	}

	/*
	*  format_value_for_api()
	*
	*  This filter is appied to the $value after it is loaded from the db and before it is passed back to the api functions such as the_field
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value	- the value which was loaded from the database
	*  @param	$post_id - the $post_id from which the value was loaded
	*  @param	$field	- the field array holding all the field options
	*
	*  @return	$value	- the modified value
	*/

	function format_value_for_api($value, $post_id, $field)
	{
		// defaults?
		/*
		$field = array_merge($this->defaults, $field);
		*/

		// perhaps use $field['preview_size'] to alter the $value?

		// Note: This function can be removed if not used
		return $value;
	}

	/*
	*  load_field()
	*
	*  This filter is appied to the $field after it is loaded from the database
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$field - the field array holding all the field options
	*
	*  @return	$field - the field array holding all the field options
	*/

	function load_field($field)
	{
		// Note: This function can be removed if not used
		return $field;
	}

	/*
	*  update_field()
	*
	*  This filter is appied to the $field before it is saved to the database
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$field - the field array holding all the field options
	*  @param	$post_id - the field group ID (post_type = acf)
	*
	*  @return	$field - the modified field
	*/

	function update_field($field, $post_id)
	{
		// Note: This function can be removed if not used
		return $field;
	}

}

// create field
new acf_field_all_users();

?>

• Elliot

• September 4, 2013 at 2:38 pm

Hi @jamesnic

Have you done any debugging in the update_value function?

Thanks
E