public function populate() {
		global $wpdb;

		$bp = buddypress();

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

		// Cache missed, so query the DB.
		if ( false === $friendship ) {
			$friendship = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$bp->friends->table_name} WHERE id = %d", $this->id ) );

			wp_cache_set( $this->id, $friendship, 'bp_friends_friendships' );
		}

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

		$this->initiator_user_id = (int) $friendship->initiator_user_id;
		$this->friend_user_id    = (int) $friendship->friend_user_id;
		$this->is_confirmed      = (int) $friendship->is_confirmed;
		$this->is_limited        = (int) $friendship->is_limited;
		$this->date_created      = $friendship->date_created;

		if ( ! empty( $this->populate_friend_details ) ) {
			if ( $this->friend_user_id == bp_displayed_user_id() ) {
				$this->friend = new BP_Core_User( $this->initiator_user_id );
			} else {
				$this->friend = new BP_Core_User( $this->friend_user_id );
			}
		}
	}