Man page - mongoc_cursor_new_from_command_reply(3)

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Manual

MONGOC_CURSOR_NEW_FROM_COMMAND_REPLY

SYNOPSIS
PARAMETERS
DESCRIPTION
RETURNS
AUTHOR
COPYRIGHT

WARNING:

Deprecated since version 1.11.0: Use mongoc_cursor_new_from_command_reply_with_opts() instead.

When migrating from the deprecated mongoc_cursor_new_from_command_reply() to mongoc_cursor_new_from_command_reply_with_opts() , note that options previously passed to the reply argument (e.g. "batchSize") must instead be provided in the opts argument.

SYNOPSIS

mongoc_cursor_t *
mongoc_cursor_new_from_command_reply (mongoc_client_t *client,
bson_t *reply,
uint32_t server_id);

PARAMETERS

•

client : A mongoc_client_t .

•

reply : The reply to a command, such as "aggregate", "find", or "listCollections", that returns a cursor document. The reply is destroyed by mongoc_cursor_new_from_command_reply and must not be accessed afterward.

•

server_id : The opaque id of the server used to execute the command.

DESCRIPTION

Some MongoDB commands return a "cursor" document. For example, given an "aggregate" command:

{ "aggregate" : "collection", "pipeline" : [], "cursor" : {}}

The server replies:

{
"cursor" : {
"id" : 1234,
"ns" : "db.collection",
"firstBatch" : [ ]
},
"ok" : 1
}

mongoc_cursor_new_from_command_reply is a low-level function that initializes a mongoc_cursor_t from such a reply. Additional options such as "tailable" or "awaitData" can be included in the reply.

When synthesizing a completed cursor response that has no more batches (i.e. with cursor id 0), server_id may be 0. If the cursor response is not completed (i.e. with non-zero cursor id), pass the server_id of the server used to create the cursor.

Use this function only for building a language driver that wraps the C Driver. When writing applications in C, higher-level functions such as mongoc_collection_aggregate() are more appropriate, and ensure compatibility with a range of MongoDB versions.

RETURNS

A mongoc_cursor_t . On failure, the cursor's error is set. Check for failure with mongoc_cursor_error() .

AUTHOR

MongoDB, Inc

COPYRIGHT

2009-present, MongoDB, Inc.