insert¶

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Definition
Behavior
Examples
Output

Definition¶

insert¶

2.6 新版功能.

The insert command inserts one or more documents and returns a document containing the status of all inserts. The insert methods provided by the MongoDB drivers use this command internally.

The command has the following syntax:

{
   insert: <collection>,
   documents: [ <document>, <document>, <document>, ... ],
   ordered: <boolean>,
   writeConcern: { <write concern> },
   bypassDocumentValidation: <boolean>
}

The insert command takes the following fields:

Field	Type	Description
`insert`	string	The name of the target collection.
`documents`	array	An array of one or more documents to insert into the named collection.
`ordered`	boolean	Optional. If `true`, then when an insert of a document fails, return without inserting any remaining documents listed in the `inserts` array. If `false`, then when an insert of a document fails, continue to insert the remaining documents. Defaults to `true`.
`writeConcern`	document	Optional. A document that expresses the write concern of the `insert` command. Omit to use the default write concern.
`bypassDocumentValidation`	boolean	Optional. Enables `insert` to bypass document validation during the operation. This lets you insert documents that do not meet the validation requirements. 3.2 新版功能.

返回:	A document that contains the status of the operation. See Output for details.

Behavior¶

The total size of all the documents array elements must be less than or equal to the maximum BSON document size.

The total number of documents in the documents array must be less than or equal to the maximum bulk size.

The insert command adds support for the bypassDocumentValidation option, which lets you bypass document validation when inserting or updating documents in a collection with validation rules.

Examples¶

Insert a Single Document¶

Insert a document into the users collection:

db.runCommand(
   {
      insert: "users",
      documents: [ { _id: 1, user: "abc123", status: "A" } ]
   }
)

The returned document shows that the command successfully inserted a document. See Output for details.

{ "ok" : 1, "n" : 1 }

Bulk Insert¶

Insert three documents into the users collection:

db.runCommand(
   {
      insert: "users",
      documents: [
         { _id: 2, user: "ijk123", status: "A" },
         { _id: 3, user: "xyz123", status: "P" },
         { _id: 4, user: "mop123", status: "P" }
      ],
      ordered: false,
      writeConcern: { w: "majority", wtimeout: 5000 }
   }
)

The returned document shows that the command successfully inserted the three documents. See Output for details.

{ "ok" : 1, "n" : 3 }

Output¶

The returned document contains a subset of the following fields:

insert.ok¶: The status of the command.

insert.n¶: The number of documents inserted.

insert.writeErrors¶

An array of documents that contains information regarding any error encountered during the insert operation. The writeErrors array contains an error document for each insert that errors.

Each error document contains the following fields:

insert.writeErrors.index¶: An integer that identifies the document in the documents array, which uses a zero-based index.

insert.writeErrors.code¶: An integer value identifying the error.

insert.writeErrors.errmsg¶: A description of the error.

insert.writeConcernError¶

Document that describe error related to write concern and contains the field:

insert.writeConcernError.code¶: An integer value identifying the cause of the write concern error.

insert.writeConcernError.errmsg¶: A description of the cause of the write concern error.

The following is an example document returned for a successful insert of a single document:

{ ok: 1, n: 1 }

The following is an example document returned for an insert of two documents that successfully inserted one document but encountered an error with the other document:

{
   "ok" : 1,
   "n" : 1,
   "writeErrors" : [
      {
         "index" : 1,
         "code" : 11000,
         "errmsg" : "insertDocument :: caused by :: 11000 E11000 duplicate key error index: test.users.$_id_  dup key: { : 1.0 }"
      }
   ]
}

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