MongoDB $oid 与 ObjectId
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MongoDB $oid vs ObjectId
提问by Vlad Vinnikov
I'm trying to get mongodb query working. Collection comes in the format:
我正在尝试让 mongodb 查询工作。集合采用以下格式：
{
"_id": {
"$oid": "54651022bffebc03098b4567"
},
"browser": "ie",
"browser_version": "10.0 Desktop",
"os_version": "8",
"device": null,
"os": "Windows"
}
The following works:
以下工作：
{
"_id": {
"$in": [
{
"$oid": "54651022bffebc03098b4567"
},
{
"$oid": "54651022bffebc03098b4568"
}
]
}
}
However, I get a syntax error for the following:
但是，我收到以下语法错误：
{
"_id": {
"$in": [
ObjectId("54651022bffebc03098b4567"),
ObjectId("54651022bffebc03098b4568")
]
}
}
There are a similar questions that suggested that ObjectId should work:
有一个类似的问题表明 ObjectId 应该可以工作：
How to create query with ObjectIds using java?
回答by jared
The MongoLab UI uses Strict MongoDB Extended JSONso Object IDs are represented thusly, as in the second code block of the OP:
MongoLab UI 使用Strict MongoDB Extended JSON，因此对象 ID 以这种方式表示，如 OP 的第二个代码块所示：
{ "$oid": "<id>" }
