Thursday, July 9, 2015

difference between save and insert in mongodb



If the document contains an _id field, then the save() method performs an upsert querying the collection on the _id field:
If a document does not exist with the specified _id value, the save() method performs an insert with the specified fields in the document.
If a document exists with the specified _id value, the save() method performs an update, replacing all field in the existing record with the fields from the document.

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