The methods listed above are synchronous, that is they will block until the result is returned. Just as I summarised the find section above, tools such as lodash can do far more, but in most cases, JavaScript’s built-in filter method will be all you need. If you want to follow along, this is the example data I will be using.ĭata.json Īs you can see, filter returns an array and it contains both records with the name field that contains the Doe Filter Summary filter will return multiple values: all matching values.find will return a single value: the first matching value found.mongod -dbpath/data You should see the mongod process start up and print some status information. Download the right MongoDB version from MongoDB Create a database directory (in this case under /data ). Just to be clear finding and filtering produce different results. Start a MongoDB Server For complete MongoDB installation instructions, see the manual.

The findOne () operation only returns the first matched document. If you don't provide a query document or if you provide an empty document, MongoDB matches all documents in the collection.

If you need to search or filter an array of objects, then this article will show you the most common ways of doing so using JavaScript’s built-in functions. The findOne () method uses a query document that you provide to match only the subset of the documents in the collection that match the query. Find and filter arrays in JavaScript and Node.js

Nodejs mongodb find