mongodb更新器

Name    Description
$inc    Increments the value of the field by the specified amount.
$mul    Multiplies the value of the field by the specified amount.
$rename    Renames a field.
$setOnInsert    Sets the value of a field if an update results in an insert of a document. Has no effect on update operations that modify existing documents.
$set    Sets the value of a field in a document.
$unset    Removes the specified field from a document.
$min    Only updates the field if the specified value is less than the existing field value.
$max    Only updates the field if the specified value is greater than the existing field value.
$currentDate    Sets the value of a field to current date, either as a Date or a Timestamp.

https://docs.mongodb.com/manual/reference/operator/update-field/

 

> db.persons.insertOrUpdate({id:"02"}, {_id:"02",name:"x0023"},true);
Sat Jun 03 17:31:56 TypeError: db.persons.insertOrUpdate is not a function (she
l):1
> db.persons.update({id:"02"}, {_id:"02",name:"x0023"},true);
E11000 duplicate key error index: foobar.persons.$_id_  dup key: { : "02" }
> db.persons.update({_id:"02"}, {_id:"02",name:"x0023"},true);
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x0023" }
{ "_id" : "03", "name" : "x03" }
> db.persons.update({_id:"02"}, {_id:"02",name:"x03"},true);
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03" }
{ "_id" : "03", "name" : "x03" }
> db.persons.update({name:"x03"}, {$set:{name:"x03"}},false,true);
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03" }
{ "_id" : "03", "name" : "x03" }
> db.persons.update({name:"x03"}, {$set:{name:"x03sd"}},false,true);
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.person.update((name:"02"),{$set:{age:23}})
Sat Jun 03 17:51:27 SyntaxError: missing ) in parenthetical (shell):1
> db.person.update({name:"02"},{$set:{age:23}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.person.update({name:"01"},{$set:{age:23}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.person.update({name:"01"},{$set:{age:23}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.person.update({"name":"01"},{$set:{age:23}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.person.update({"name":"x03sd"},{$set:{age:23}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$set:{age:23}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "age" : 23, "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$inc:{age:3}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "age" : 26, "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$inc:{age:-3}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "age" : 23, "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$unset:{age:1}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$push:{habby:"aa"}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "habby" : [ "aa" ], "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$push:{habby:"bb"}})
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "03", "name" : "x03sd" }
{ "_id" : "02", "habby" : [ "aa", "bb" ], "name" : "x03sd" }
> db.persons.update({"name":"x03sd"},{$push:{name:"bb"}})
Cannot apply $push/$pushAll modifier to non-array
>