MongoDB:createCollection with parameters

Question

I used this comment

> db.createCollection("naveen",{capped:true,autoIndexId:true,size:53440099,max:1000});

and I got this:

{
    "note" : "the autoIndexId option is deprecated and will be removed in a future release",
    "ok" : 1
}

Answer 1

In fact, MongoDB doesn't need to create a collection, when you insert document MongoDB will automatically create a collection for you, and also generate unique Id for each document!

Example:

db.createCollection("naveen",{capped:true,autoIndexId:true,size:53440099,max:1000}); //don't

you don't need to create a collection, you just need to insert a direct document, it's not like SQL, It's JSON.

{ name: 'john', ...}

like this, insert document without creating a collection, it automatically generates a collection for you!

db.newYear.insert({ name: 'john', age: 33, year: 2020 });