Creating a search operation to target a particular element within an array of objects

Struggling with setting up a query that involves an array of objects within a specific index. My Schema includes a field that consists of an array of objects:

{userID: ObjectID, someArray: [{foo: "bar"},{bar: "foo"}]}

I am interested in retrieving records where the first element in SomeArray contains a non-empty object or where someArray does not have null values.

I attempted to use: 

 db.find({someArray: {$exists: true, $not: {$size: 0}} })

However, someArray sometimes includes null objects, rendering this approach ineffective. As a last resort, I could cache the entire collection and filter using raw JavaScript, although this might not be the most efficient method.

javascriptmongodbmongoose

Answer №1

In order to address the issue at hand, my recommendation would be to utilize the $ne (not-equal) helper.

Here is how you can implement it:

db.find({someArray: {$ne: null})

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