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=== Multi-update === <source lang=bash> > db.users.find() { "_id" : ObjectId("548fe29d991680933fb5a00a"), "username" : "Gaga Liu" } { "_id" : ObjectId("548fe214991680933fb5a008"), "favorites" : { "movies" : [ "Casablanca", "Rocky" ] }, "username" : "smith" } { "_id" : ObjectId("548fe28e991680933fb5a009"), "favorites" : { "movies" : [ "Casablanca" ] }, "username" : "Jack Tan" } > > db.users.update({"favorites.movies":"Casablanca"},{$addToSet:{"favorites.movies":"The Maltese Falcon"}}, false, false) > db.users.find() { "_id" : ObjectId("548fe29d991680933fb5a00a"), "username" : "Gaga Liu" } { "_id" : ObjectId("548fe214991680933fb5a008"), "favorites" : { "movies" : [ "Casablanca", "Rocky", "The Maltese Falcon" ] }, "username" : "smith" } { "_id" : ObjectId("548fe28e991680933fb5a009"), "favorites" : { "movies" : [ "Casablanca" ] }, "username" : "Jack Tan" } > > > db.users.update({username:"smith"},{$set:{favorites:{movies:["Casablanca","Rocky"]}}}) > db.users.find() { "_id" : ObjectId("548fe29d991680933fb5a00a"), "username" : "Gaga Liu" } { "_id" : ObjectId("548fe214991680933fb5a008"), "favorites" : { "movies" : [ "Casablanca", "Rocky" ] }, "username" : "smith" } { "_id" : ObjectId("548fe28e991680933fb5a009"), "favorites" : { "movies" : [ "Casablanca" ] }, "username" : "Jack Tan" } > > db.users.update({"favorites.movies":"Casablanca"},{$addToSet:{"favorites.movies":"The Maltese Falcon"}}, false, true) > db.users.find() { "_id" : ObjectId("548fe29d991680933fb5a00a"), "username" : "Gaga Liu" } { "_id" : ObjectId("548fe214991680933fb5a008"), "favorites" : { "movies" : [ "Casablanca", "Rocky", "The Maltese Falcon" ] }, "username" : "smith" } { "_id" : ObjectId("548fe28e991680933fb5a009"), "favorites" : { "movies" : [ "Casablanca", "The Maltese Falcon" ] }, "username" : "Jack Tan" } </source> <br><br>
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