mongoc_gridfs_find_one()

Warning

Deprecated since version 1.5.0: This function is deprecated, use mongoc_gridfs_find_one_with_opts() instead.

Synopsis

mongoc_gridfs_file_t *
mongoc_gridfs_find_one (mongoc_gridfs_t *gridfs,
                        const bson_t *query,
                        bson_error_t *error) BSON_GNUC_WARN_UNUSED_RESULT
   BSON_GNUC_DEPRECATED_FOR (mongoc_gridfs_find_one_with_opts);

Parameters

• gridfs: A mongoc_gridfs_t.

• query: A bson_t.

• error: An optional location for a bson_error_t or NULL.

Description

This function shall execute a query on the underlying gridfs implementation. The first file matching query will be returned. If there is an error, NULL is returned and error is filled out; if there is no error but no matching file is found, NULL is returned and the error code and domain are 0.

This function is considered a retryable read operation. Upon a transient error (a network error, errors due to replica set failover, etc.) the operation is safely retried once. If retryreads is false in the URI (see mongoc_uri_t) the retry behavior does not apply.

Errors

Errors are propagated via the error parameter.

Returns

A newly allocated mongoc_gridfs_file_t or NULL if no file could be found. You must free the resulting file with mongoc_gridfs_file_destroy() if non-NULL.