Javascript MongoDB 选择_id 数组中的位置？
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MongoDB select where in array of _id?
提问by itsme
is possible in mongo db to select collection's documents like in SQL :
可以在 mongo db 中像在 SQL 中一样选择集合的文档：
SELECT * FROM collection WHERE _id IN (1,2,3,4);
or if i have a _id arrayi must select one by one and then recompose the array/objectof results?
或者如果我有一个_id array我必须一一选择然后重新组合array/object结果？
回答by programmersbook
Easy :)
简单 ：）
db.collection.find( { _id : { $in : [1,2,3,4] } } );
taken from: http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24in
取自：http: //www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24in
回答by KARTHIKEYAN.A
In this code list is the array of ids in user collection
在此代码列表中是用户集合中的 id 数组
var list = ["5883d387971bb840b7399130","5883d389971bb840b7399131","5883d38a971bb840b7399132"]
.find({ _id: {$in : list}})
回答by sourabhxiii
This is not related to mongo query. I was familiar with SQL and used Studio3T IDE to query a mongo database using SQL. If you are one like me, I want to point out that the id value needs to be typecasted. So the query will look like:
这与 mongo 查询无关。我熟悉 SQL 并使用 Studio3T IDE 使用 SQL 查询 mongo 数据库。如果你和我一样，我想指出 id 值需要类型转换。所以查询将如下所示：
SELECT _id from <collectionName>
WHERE _id = ObjectId("5883d387971bb840b7399130");
