MongoDB 更新（将项目列表插入数组）
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MongoDB Update (Insert a List of Item to an Array)
提问by hamed hamed
I want to add several items to arrays of several rows in Mongo. How can I do this?
我想在 Mongo 中将几个项目添加到几行的数组中。我怎样才能做到这一点？
I want to start with this:
我想从这个开始：
{'x': 'h', arr: [1,2,3] }
{'x': 'h', arr: [1,3] }
and add the array [6,8], where the x is equal to 'h':
并添加数组 [6,8]，其中 x 等于 'h'：
{'x': 'h', arr: [1,2,3,6,8] }
{'x': 'h', arr: [1,6,8] }
回答by Adam Comerford
I think what you are looking for is the $pushAll operator. Take a look here:
我认为您正在寻找的是 $pushAll 运算符。看看这里：
http://docs.mongodb.org/manual/reference/operator/pushAll/#pushall
http://docs.mongodb.org/manual/reference/operator/pushAll/#pushall
回答by theJollySin
If you have a MongoDB collection named yourCollectionand a record with the name x, you would update the subarray with something like this:
如果您有一个名为 MongoDB 的集合yourCollection和一个名为的记录x，您将使用以下内容更新子数组：
db.test.update( {"name":"x"}, {"$pushAll" : {arr : [1, 2, 3]}} )
db.test.update( {"name":"x"}, {"$pushAll" : {arr : [1, 2, 3]}} )
The important keyword here is $pushAll. You can use it to add items to arrays inside of a single record attribute.
这里的重要关键字是$pushAll。您可以使用它向单个记录属性内的数组添加项目。
回答by Nate Ferrero
If you want to update multiple records, it's important to pass trueas the 4th argument to the update function:
如果你想更新多条记录，重要的true是将第四个参数传递给更新函数：
db.test.update( {"name": "x"}, {"$pushAll": {"arr": [1, 2, 3]}}, false, true)
Per the MongoDB shell syntax for update():
根据 update() 的 MongoDB shell 语法：
db.collection.update( criteria, objNew, upsert, multi )
- upsert- if the record(s) do not exist, insert one. Upsert only inserts a single document
- mutli- indicates if all documents matching criteria should be updated rather than just one
- upsert- 如果记录不存在，插入一个。Upsert 只插入一个文档
- mutli- 指示是否应该更新所有符合条件的文档，而不仅仅是一个
回答by James Mallon
the simplest approach is by using a conventional update operation
最简单的方法是使用传统的更新操作
db.urColl.update(
{ x: "h" },
{ $push: { arr: { $each: [6,8] } } },
{ multi: true }
);`
回答by krekto
$pushAll
Deprecated since version 2.4: Use the $pushoperator with $eachinstead.
$pushAll
2.4 版后已弃用：使用$push运算符 with$each代替。
The $pushAlloperator appends the specified values to an array.
所述$pushAll操作者将指定值的数组。
The $pushAlloperator has the form:
该$pushAll运营商的形式为：
{ $pushAll: { <field>: [ <value1>, <value2>, ... ] } }
If you specify a single value, $pushAllwill behave as $push.
如果您指定单个值，$pushAll则将表现为$push.
