英文:
mongoDB update collection documents
问题
我有一个更新请求，该请求应该更新我的数据库中的现有数据，就像以下示例一样：
现有数据 => [{_id:"abnc214124",name:"mustafa",age:12,etc...}, {_id:"abnc21412432",name:"mustafa1",age:32,etc...}, {_id:"abnc214124123",name:"mustafa3",age:52,etc...} etc... ]
新数据 => [{_id:"abnc214124",name:"mustafaxxx",age:12,etc...}, {_id:"abnc21412432",name:"mustafa1",age:35,etc...}, {_id:"abnc214124123",name:"mustafa3",age:20,etc...} etc... ]
要更新的字段：
在第一个文档中，更新名称。
在第二个文档中，更新年龄。
在第三个文档中，更新年龄。
最佳的方法是如何更新现有数据，而不影响旧字段（未修改字段）？
顺便说一下，
我尝试循环遍历文档并检查字段然后更新它们，但这会导致长时间的响应时间，为了解决这个问题，我在NodeJS上使用了多线程，现在我需要更好的解决方案。
英文:
I have an update request and that request should update the existing data in my database like the flowing example
existing data => [{_id:"abnc214124",name:"mustafa",age:12,etc...},
{_id:"abnc21412432",name:"mustafa1",age:32,etc...},
{_id:"abnc214124123",name:"mustafa3",age:52,etc...}
etc...
]
new Data => [{_id:"abnc214124",name:"mustafaxxx",age:12,etc...},
{_id:"abnc21412432",name:"mustafa1",age:35,etc...},
{_id:"abnc214124123",name:"mustafa3",age:20,etc...}
etc...
]
the updated fields :
in the first document name
second age
third age
what is the best way to update the existing data without affect the old fields (not modified fields)
BTW
I tried to loop through documents and check the fields then update them but this will cause long response time and to solve this I used multithread on NodeJS and now I need better solution
答案1
得分: 1
要更新集合中的多个文档，您可以使用 updateMany()
这是 updateMany() 的示例
db.collection.updateMany(
<filter>,
<update>,
{
multi: true
}
)
在上面的示例中：
filter 参数指定要更新的文档
update 参数指定要执行的更新
英文:
To Update the multiple documents of a collection. you can use updateMany()
This is the example of updateMany()
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
db.collection.updateMany(
<filter>,
<update>,
{
multi: true
}
)
<!-- end snippet -->
In Above example:
filter parameter specifies which documents to update
update parameter specifies the update to be performed
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