Question

I’ve been browsing through the documentation, but I can’t seem to figure out a way to perform a find on my mongodb collection using only a key.
For example, let’s suppose this is what’s inside my collection

{ 'res1': 10 }
{ 'res2: 20 }

How can I query the collection using only the key ‘res1’, in order to get 10 ?

Answer 1

Not sure exaclty what you want, so… This is if you want all documents that have key res1 set:

db.collection.find({'res1': { $exists : true }})

And this is if you want all the documents that have key res1 set to 10:

db.collection.find({'res1': 10})