CODEWITHSUNDEEP
node.jsmongodbecmascript-6
sidharth ramanan
sidharth ramanan

Reputation: 321

Trouble fetching multiple documents using find() in MongoDB

I'm trying to fetch more than one document that satisfies a particular criteria from a collection in my MongoDB database. When I use findOne(), it works perfectly fine and returns the first document that follows the criteria, but find() isn't returning all of the documents. I've checked a lot of websites and the documentation but still haven't found good examples of how it is done. This is the current syntax that I'm trying :

   db.collection('mycollection').find({someproperty : 
   somevalue}).then((docs)=>{
      // trying to do something with the returned documents 'docs'
   }

Also, I'd really prefer a non-mongoose solution, unless this is absolutely impossible using plain MongoDB. I know it's probably easier with mongoose but I want to know the MongoDB implementation.

Upvotes: 0

Views: 31

Answers (1)

Peter Grainger
Peter Grainger

Reputation: 5137

In the Mongo Docs the find function returns a cursor.

A cursor to the documents that match the query criteria. When the find() method “returns documents,” the method is actually returning a cursor to the documents.

I'm guessing you expect an array? You need to use the toArray function, the docs for this are https://mongodb.github.io/node-mongodb-native/api-generated/cursor.html#toarray

Unfortunately it's a callback, no promise implementation so you will need to put the promise in there yourself.

return new Promise((resolve, reject) => db.collection('mycollection')
  .find({someproperty : somevalue})
  .toArray((err, documents) => resolve(documents)));

Upvotes: 1

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