查看MongoDB Quick Start的源代码
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MongoDB Quick Start
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因为以下原因,你没有权限编辑本页:
您刚才请求的操作只有这个用户组中的用户才能使用:
用户
您可以查看并复制此页面的源代码:
=== Update === <source lang=bash> > db.users.find() { "_id" : ObjectId("548fe214991680933fb5a008"), "username" : "smith" } { "_id" : ObjectId("548fe28e991680933fb5a009"), "username" : "Jack Tan" } { "_id" : ObjectId("548fe29d991680933fb5a00a"), "username" : "Gaga Liu" } > db.users.update({username:"smith"},{$set:{country:"Canada"}}) > db.users.find({username:"smith"}) { "_id" : ObjectId("548fe214991680933fb5a008"), "country" : "Canada", "username" : "smith" } > db.users.update({username:"smith"},{$unset:{country: 1}}) > db.users.find({username:"smith"}) { "_id" : ObjectId("548fe214991680933fb5a008"), "username" : "smith" } > db.users.update({username:"smith"},{$set:{favorites: ... { ... cities:["Chicago", "Cheyenne"], ... movies:["Casablanca", "The Sting"] ... } ... } ... }) > db.users.find({username:"smith"}) { "_id" : ObjectId("548fe214991680933fb5a008"), "favorites" : { "cities" : [ "Chicago", "Cheyenne" ], "movies" : [ "Casablanca", "The Sting" ] }, "username" : "smith" } > db.users.update({username:"smith"},{$set:{favorites: ... { ... movies: ["Casablanca", "Rocky"] ... } ... } ... }) > db.users.find() { "_id" : ObjectId("548fe28e991680933fb5a009"), "username" : "Jack Tan" } { "_id" : ObjectId("548fe29d991680933fb5a00a"), "username" : "Gaga Liu" } { "_id" : ObjectId("548fe214991680933fb5a008"), "favorites" : { "movies" : [ "Casablanca", "Rocky" ] }, "username" : "smith" } </source> <br><br>
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