mongoc_gridfs_find_one - Man Page

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

• gridfs: A mongoc_gridfs_t.
• query: A bson_t.
• error: An optional location for a bson_error_t or NULL.

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 are propagated via the error parameter.

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.

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