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 In this example we use an empty query object, which selects all documents in the collection. The first parameter of the find () method is a query object. The find () method returns all occurrences in the selection. 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. To select data from a table in MongoDB, we can also use the find () method.

filter will return multiple values: all matching values Find a Document Node.js Docs Home Node.js Find a Document You can query for a single document in a collection with the collection.findOne () method.

find will return a single value: the first matching value found.

Just to be clear finding and filtering produce different results. 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. Let us try to access a MongoDB database with Node.js. Find and filter arrays in JavaScript and Node.js

Nodejs mongodb find