mongodb - 将文档插入到 MongoDB 中的特定 ID

Question

我正在尝试将文档插入到特定 ID(由 mongoDB 默认生成的 ID)中，就像我们在 mysql 中所做的那样(INSERT WHERE id="985264")。

app.get('/', function(req , res){
db.facebook.insert({
_id:985264,
 username: "Solomon.david",
 status : "i love to code and eat",
 comments: [
{
  user : "jackson",
  comment: "even me "
}
]
  }, function(err,docs){
 res.render('won.html');     
  });
}); 

Answer 1

您所要做的就是指定 _id您尝试插入的文档中的属性:

db.collection.insert( { "_id": "unique_id", "foo": "bar", ... } )

如 the documentation 中所述，您应该注意执行一些注意事项 - 即，您需要确保 _id您指定的是唯一的。

取自链接的文档页面:

If the document does not specify an _id field, then MongoDB will add the _id field and assign a unique ObjectId for the document before inserting. Most drivers create an ObjectId and insert the _id field, but the mongod will create and populate the _id if the driver or application does not.

If the document contains an _id field, the _id value must be unique within the collection to avoid duplicate key error.