Inventory_Presser_Plugin::register_meta_fields()

	function register_meta_fields()
	{
		//Add meta fields to our post type
		foreach( INVP::keys_and_types( true ) as $key_arr )
		{
			$key = apply_filters( 'invp_prefix_meta_key', $key_arr['name'] );
			register_post_meta( INVP::POST_TYPE, $key, array(
				'show_in_rest' => true,
				'single'       => true,
				'type'         => $key_arr['type'],
			) );
		}

		//Register a meta field for a multi-value options array
		register_post_meta(
			INVP::POST_TYPE,
			apply_filters( 'invp_prefix_meta_key', 'options_array' ),
			array(
				'show_in_rest' => true,
				'single'       => false,
				'type'         => 'string',
			)
		);

		//Add a couple fields that are used on media attachments
		$attachment_keys = array();
		$attachment_keys[] = array(
			'name' => 'hash',
			'type' => 'string',
		);
		$attachment_keys[] = array(
			'name' => 'photo_number',
			'type' => 'integer',
		);
		$attachment_keys[] = array(
			'name' => 'vin',
			'type' => 'string',
		);


		//Add meta fields to attachments
		foreach( $attachment_keys as $key_arr )
		{
			$key = apply_filters( 'invp_prefix_meta_key', $key_arr['name'] );
			register_post_meta( 'attachment', $key, array(
				'sanitize_callback' => 'sanitize_text_field',
				'show_in_rest'      => true,
				'single'            => true,
				'type'              => $key_arr['type'],
			) );
		}
	}