public function populate() {
		global $wpdb;
		$invites_table_name = BP_Invitation_Manager::get_table_name();

		// Check cache for invitation data.
		$invitation = wp_cache_get( $this->id, 'bp_invitations' );

		// Cache missed, so query the DB.
		if ( false === $invitation ) {
			$invitation = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$invites_table_name} WHERE id = %d", $this->id ) );
			wp_cache_set( $this->id, $invitation,'bp_invitations' );
		}

		// No invitation found so set the ID and bail.
		if ( empty( $invitation ) || is_wp_error( $invitation ) ) {
			$this->id = 0;
			return;
		}

		$this->user_id           = (int) $invitation->user_id;
		$this->inviter_id        = (int) $invitation->inviter_id;
		$this->invitee_email     = $invitation->invitee_email;
		$this->class             = sanitize_key( $invitation->class );
		$this->item_id           = (int) $invitation->item_id;
		$this->secondary_item_id = (int) $invitation->secondary_item_id;
		$this->type              = $invitation->type;
		$this->content           = $invitation->content;
		$this->date_modified     = $invitation->date_modified;
		$this->invite_sent       = (int) $invitation->invite_sent;
		$this->accepted          = (int) $invitation->accepted;

	}