---
name: "mongoc_collection_save"
section: "3"
platform: "linux"
package: "libmongoc-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mongoc_collection_save"
---

# mongoc\_collection\_save(3)

**WARNING:**

Deprecated since version 1.9.0: Use *mongoc\_collection\_insert\_one()* or *mongoc\_collection\_replace\_one()* with "upsert" instead.

## SYNOPSIS

```
bool
mongoc_collection_save (mongoc_collection_t *collection,
                        const bson_t *document,
                        const mongoc_write_concern_t *write_concern,
                        bson_error_t *error);
```

## PARAMETERS

- •

  **collection**: A *mongoc\_collection\_t*.

- •

  **document**: A *bson\_t* containing the document.

- •

  **write\_concern**: A *mongoc\_write\_concern\_t* or **NULL** for default write concern.

- •

  **error**: An optional location for a *bson\_error\_t* or **NULL**.

## DESCRIPTION

This function shall save a document into **collection**. If the document has an **\_id** field it will be updated. Otherwise it will be inserted.

## ERRORS

Errors are propagated via the **error** parameter.

## RETURNS

Returns **true** if successful. Returns **false** and sets **error** if there are invalid arguments or a server or network error.

A write concern timeout or write concern error is considered a failure.

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.