Performing Modifications: Basic Document Updates

• How do you update a single document?

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  • Using update({query},{update})

• Can you update multiple documents?

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  • Yes: using update({query},{update},{upsert},{multi => TRUE}
  • If multi is TRUE, all documents matching query are updated
  • Default value of multi = FALSE

• What basic update operators are available?

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  • Basic: $inc, $set, $unset, $rename, $setOnInsert
  • More info: docs.mongodb.org/manual/reference/operator/update/#id1

• Can you save and update?

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  • Using save() or update({query},{update},TRUE)
  • If _id is unique a new document is saved
  • If _id matches the existing document is updated
  • A new document is added if the upsert parameter of update() is TRUE