mongodb/mongoose findMany - 查找 ID 列在数组中的所有文档 [英] mongodb/mongoose findMany - find all documents with IDs listed in array
问题描述
我有一个 _id 数组,我想相应地获取所有文档,最好的方法是什么?
I have an array of _ids and I want to get all docs accordingly, what's the best way to do it ?
类似……
// doesn't work ... of course ...
model.find({
'_id' : [
'4ed3ede8844f0f351100000c',
'4ed3f117a844e0471100000d',
'4ed3f18132f50c491100000e'
]
}, function(err, docs){
console.log(docs);
});
该数组可能包含数百个 _id.
The array might contain hundreds of _ids.
推荐答案
mongoose 中的 find
函数是对 mongoDB 的完整查询.这意味着您可以使用方便的 mongoDB $in
子句,它的工作方式与 SQL 版本相同.
The find
function in mongoose is a full query to mongoDB. This means you can use the handy mongoDB $in
clause, which works just like the SQL version of the same.
model.find({
'_id': { $in: [
mongoose.Types.ObjectId('4ed3ede8844f0f351100000c'),
mongoose.Types.ObjectId('4ed3f117a844e0471100000d'),
mongoose.Types.ObjectId('4ed3f18132f50c491100000e')
]}
}, function(err, docs){
console.log(docs);
});
即使对于包含数万个 id 的数组,这种方法也能很好地工作.(请参阅有效确定记录的所有者)
This method will work well even for arrays containing tens of thousands of ids. (See Efficiently determine the owner of a record)
我建议任何使用 mongoDB
的人通读 高级查询 优秀官方 mongoDB 文档 部分>
I would recommend that anybody working with mongoDB
read through the Advanced Queries section of the excellent Official mongoDB Docs
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