---
name: "MongoDB::WriteResult"
section: "3pm"
platform: "linux"
package: "libmongodb-perl"
version: "0.705.0.0-1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/MongoDB::WriteResult"
---

# MongoDB::WriteResult(3pm)

MongoDB write result document

## NAME

MongoDB::WriteResult - MongoDB write result document

## VERSION

version v0.705.0.0

## SYNOPSIS

```
    # returned directly
    my $result = $bulk->execute;
    # from a WriteError or WriteConcernError
    my $result = $error->result;
```

## DESCRIPTION

This class encapsulates the results from a bulk write operation. It may be returned directly from `"execute"` or it may be in the `"result"` attribute of a `"MongoDB::DatabaseError"` subclass like `"MongoDB::WriteError"` or `"MongoDB::WriteConcernError"`.

## ATTRIBUTES

### nInserted

Number of documents inserted

### nUpserted

Number of documents upserted

### nMatched

Number of documents matched for an update or replace operation.

### nRemoved

Number of documents removed

### nModified

Number of documents actually modified by an update operation. This is not necessarily the same as "nMatched" if the document was not actually modified as a result of the update.

This field is not available from legacy servers before version 2.6. If results are seen from a legacy server (or from a mongos proxying for a legacy server) this attribute will be `"undef"`.

### upserted

An array reference containing information about upserted documetns (if any). Each document will have the following fields:

- •

  index X 0-based index indicating which operation failed

- •

  \_id X the object ID of the upserted document

### writeErrors

An array reference containing write errors (if any).  Each error document will have the following fields:

- •

  index X 0-based index indicating which operation failed

- •

  code X numeric error code

- •

  errmsg X textual error string

- •

  op X a representation of the actual operation sent to the server

### writeConcernErrors

An array reference containing write concern errors (if any).  Each error document will have the following fields:

- •

  index X 0-based index indicating which operation failed

- •

  code X numeric error code

### op\_count

The number of operations sent to the database.

### batch\_count

The number of database commands issued to the server.  This will be less than the `"op_count"` if multiple operations were grouped together.

## METHODS

### count\_writeErrors

Returns the number of write errors

### count\_writeConcernErrors

Returns the number of write errors

### last\_errmsg

Returns the last `"errmsg"` field from either the list of `"writeErrors"` or `"writeConcernErrors"` or the empty string if there are no errors.

## AUTHORS

- •

  David Golden \<david.golden@mongodb.org\>

- •

  Mike Friedman \<friedo@mongodb.com\>

- •

  Kristina Chodorow \<kristina@mongodb.org\>

- •

  Florian Ragwitz \<rafl@debian.org\>

## COPYRIGHT AND LICENSE

This software is Copyright (c) 2014 by MongoDB, Inc..

This is free software, licensed under:

```
  The Apache License, Version 2.0, January 2004
```