public function save() {
		global $wpdb;

		$bp = buddypress();

		$this->initiator_user_id = apply_filters( 'friends_friendship_initiator_user_id_before_save', $this->initiator_user_id, $this->id );
		$this->friend_user_id    = apply_filters( 'friends_friendship_friend_user_id_before_save',    $this->friend_user_id,    $this->id );
		$this->is_confirmed      = apply_filters( 'friends_friendship_is_confirmed_before_save',      $this->is_confirmed,      $this->id );
		$this->is_limited        = apply_filters( 'friends_friendship_is_limited_before_save',        $this->is_limited,        $this->id );
		$this->date_created      = apply_filters( 'friends_friendship_date_created_before_save',      $this->date_created,      $this->id );

		/**
		 * Fires before processing and saving the current friendship request.
		 *
		 * @since 1.0.0
		 *
		 * @param BP_Friends_Friendship $value Current friendship request object.
		 */
		do_action_ref_array( 'friends_friendship_before_save', array( &$this ) );

		// Update.
		if (!empty( $this->id ) ) {
			$result = $wpdb->query( $wpdb->prepare( "UPDATE {$bp->friends->table_name} SET initiator_user_id = %d, friend_user_id = %d, is_confirmed = %d, is_limited = %d, date_created = %s WHERE id = %d", $this->initiator_user_id, $this->friend_user_id, $this->is_confirmed, $this->is_limited, $this->date_created, $this->id ) );

		// Save.
		} else {
			$result = $wpdb->query( $wpdb->prepare( "INSERT INTO {$bp->friends->table_name} ( initiator_user_id, friend_user_id, is_confirmed, is_limited, date_created ) VALUES ( %d, %d, %d, %d, %s )", $this->initiator_user_id, $this->friend_user_id, $this->is_confirmed, $this->is_limited, $this->date_created ) );
			$this->id = $wpdb->insert_id;
		}

		/**
		 * Fires after processing and saving the current friendship request.
		 *
		 * @since 1.0.0
		 *
		 * @param BP_Friends_Friendship $value Current friendship request object.
		 */
		do_action_ref_array( 'friends_friendship_after_save', array( &$this ) );

		return $result;
	}