MongoDB\Driver\Server::executeCommand
(mongodb >=1.0.0)
MongoDB\Driver\Server::executeCommand — Execute a database command on this server
설명
$db
, MongoDB\Driver\Command $command
[, MongoDB\Driver\ReadPreference $readPreference
] )
Executes command on this server.
Note:
The
readPreferenceparameter does not control the server to which the driver issues the command; the command will always be executed on this server object. Instead, it may be used when issuing the command to a secondary (from a replica set connection, not standalone) or mongos node to ensure that the driver sets the wire protocol accordingly or adds the read preference to the command document, respectively.
인수
-
db(string) -
The name of the database on which to execute the command.
-
command(MongoDB\Driver\Command) -
The MongoDB\Driver\Command to execute.
-
readPreference(MongoDB\Driver\ReadPreference) -
Optionally, a MongoDB\Driver\ReadPreference to select the server for this operation. If none is given, the read preference from the MongoDB Connection URI will be used.
반환값
Returns MongoDB\Driver\Cursor on success.
오류/예외
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
- Throws MongoDB\Driver\Exception\ConnectionException if connection to the server fails (for reasons other than authentication).
- Throws MongoDB\Driver\Exception\AuthenticationException if authentication is needed and fails.
- Throws MongoDB\Driver\Exception\RuntimeException on other errors (e.g. invalid command, issuing a write command to a secondary).
주의
Note:
This method does not take a MongoDB\Driver\WriteConcern parameter. For write commands (e.g. » findAndModify in MongoDB 3.2+), the write concern should be included in the
commanddocument itself.It is the caller's responsibility to ensure that the server is capable of executing the command. For example, executing a write operation on a secondary (excluding its "local" database) will fail.
참고
- MongoDB\Driver\Command
- MongoDB\Driver\Cursor
- MongoDB\Driver\ReadPreference
- MongoDB\Driver\Manager::executeCommand() - Execute a database command
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