mongodb - save()和insert()的區別

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遇到_id相同的情況下：
insert操作會報錯；save完成儲存操作

> db.person.find()> db.person.insert({"_id":1,age:1,name:"hh"})WriteResult({ "nInserted" : 1 })> db.person.find(){ "_id" : 1, "age" : 1, "name" : "hh" }#insert一個"_id"已經存在的文檔> db.person.insert({"_id":1,age:10,name:"hh02"})WriteResult({        "nInserted" : 0,        "writeError" : {                "code" : 11000,                "errmsg" : "E11000 duplicate key error collection: foobar.person index: _id_ dup key: { : 1.0 }"        }})> db.person.find(){ "_id" : 1, "age" : 1, "name" : "hh" }#save一個"_id"已經存在的文檔> db.person.save({"_id":1,age:10,name:"hh02"})WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })> db.person.find(){ "_id" : 1, "age" : 10, "name" : "hh02" }> 

 

mongodb - save()和insert()的區別