壳快参

mongo 壳命令历史¶

You can retrieve previous commands issued in the mongo shell with the up and down arrow keys. Command history is stored in ~/.dbshell file. See .dbshell for more information.

指令列自变量的选项¶

The mongo executable can be started with numerous options. See mongo executable page for details on all available options.

The following table displays some common options for mongo:

命令助手¶

The mongo shell provides various help. The following table displays some common help methods and commands:

基本壳JavaScript操作¶

The mongo shell provides numerous mongo Shell JavaScript 快参 methods for database operations.

In the mongo shell, db is the variable that references the current database. The variable is automatically set to the default database test or is set when you use the use <db> to switch current database.

The following table displays some common JavaScript operations:

coll = db.myCollection;

coll.find();

For more information on performing operations in the shell, see:

• 创建
• 读
• 更新
• 删除
• 索引操作
• 读
• 写
• mongo Shell JavaScript 快参

快捷键¶

在 2.2 版更改.

The mongo shell provides most keyboard shortcuts similar to those found in the bash shell or in Emacs. For some functions mongo provides multiple key bindings, to accommodate several familiar paradigms.

The following table enumerates the keystrokes supported by the mongo shell:

查询¶

In the mongo shell, perform read operations using the db.collection.find() and db.collection.findOne() methods.

The db.collection.find() method returns a cursor object which the mongo shell iterates to print documents on screen. By default, mongo prints the first 20. The mongo shell will prompt the user to “Type it” to continue iterating the next 20 results.

The following table provides some common read operations in the mongo shell:

coll = db.users;
coll.find( { name: "Joe" } );

coll = db.users;
coll.find( { },
           { name: true }
         );

coll = db.users;
coll.find().sort( { name: 1 } );

coll = db.users;
coll.findOne( { name: "Joe" } );

See 读 and 读 documentation for more information and examples. See 查询,更新, 以及投影算符快速参考 to specify other query operators.

错误检查方法¶

The mongo shell provides numerous administrative database methods, including error checking methods. These methods are:

管理命令助手¶

The following table lists some common methods to support database administration:

See also administrative database methods for a full list of methods.

打开另外的连接¶

You can create new connections within the mongo shell.

The following table displays the methods to create the connections:

db = connect("<host>:<port>/<dbname>")

conn = new Mongo()
db = conn.getDB("dbname")

See also Opening New Connections for more information on the opening new connections from the mongo shell.

杂项¶

The following table displays some miscellaneous methods:

See the MongoDB JavaScript API Documentation for a full list of JavaScript methods .

其他资源¶

Consider the following reference material that addresses the mongo shell and its interface:

• mongo
• mongo Shell JavaScript 快参
• 查询,更新, 以及投影算符快速参考
• 数据库命令快参
• 聚合参考
• 元查询算符快参

Additionally, the MongoDB source code repository includes a jstests directory which contains numerous mongo shell scripts.