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WriteResult()¶

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Definition¶

WriteResult()¶: A wrapper that contains the result status of the mongo shell write methods.

See

db.collection.insert(), db.collection.update(), db.collection.remove(), and db.collection.save().

Properties¶

The WriteResult has the following properties:

WriteResult.nInserted¶: The number of documents inserted, excluding upserted documents. See WriteResult.nUpserted for the number of documents inserted through an upsert.

WriteResult.nMatched¶: The number of documents selected for update. If the update operation results in no change to the document, e.g. $set expression updates the value to the current value, nMatched can be greater than nModified.

WriteResult.nModified¶: The number of existing documents updated. If the update/replacement operation results in no change to the document, such as setting the value of the field to its current value, nModified can be less than nMatched.

WriteResult.nUpserted¶: The number of documents inserted by an upsert.

WriteResult._id¶: The _id of the document inserted by an upsert. Returned only if an upsert results in an insert.

WriteResult.nRemoved¶: The number of documents removed.

WriteResult.writeError¶

A document that contains information regarding any error, excluding write concern errors, encountered during the write operation.

WriteResult.writeError.code¶: An integer value identifying the error.

WriteResult.writeError.errmsg¶: A description of the error.

WriteResult.writeConcernError¶

A document that contains information regarding any write concern errors encountered during the write operation.

WriteResult.writeConcernError.code¶: An integer value identifying the write concern error.

WriteResult.writeConcernError.errInfo¶: A document identifying the write concern setting related to the error.

WriteResult.writeConcernError.errmsg¶: A description of the error.

See also

WriteResult.hasWriteError(), WriteResult.hasWriteConcernError()

← UUID() WriteResult.hasWriteError() →