MongoDB provides the update() method to update the documents of a collection. The method accepts as its parameters:
- an update conditions document to match the documents to update,
- an update operations document to specify the modification to perform, and
- an options document.
To specify the update condition, use the same structure and syntax as the query conditions.
> db.users.update( { Name : "Himen Patel" }, {$set : { "Email" : "admin@dotnet-fundamentals.com"} })
A successful update of the document returns the following object:
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
Update multiple documents.
By default, the update() method updates a single document. To update multiple documents, use the multi option in the update() method.
db.users.update( { Name : "Himen Patel" }, {$set : { "Email" : "admin@dotnet-fundamentals.com"} }, {multi: true})
A successful update of the document returns the following object.
WriteResult({ "nMatched" : 2, "nUpserted" : 0, "nModified" : 1 })
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