How to match values in mongodb array with another array

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User Document

This is a user document in my mongodb, there are many other user documents as well. And have an array of interests like this

myInterests['gaming','reading']

This array can be dynamic in the future

I want to write a query in which I can get the list of those users who have these 2 interests or atleast 1 of them, how can I write a query for this?

router.get("/", auth, async function (req, res) {
  const { interests: myInterests } = req.user;
  const users = await User.find({
    interests: { $in: [myInterests] },
  }).select({ email: 1, interests: 1 });
  console.log(users);
});

I have tried this code but this code is getting me the list of those users only which have these 2 interests. I want to get those users too which have at least 1 of the elements of this array.

node.js mongodb javascript
1 Answers

The myInterests is already an array. The query should be like this

interests: {
      $in: myInterests,
    }

instead of

interests: {
      $in: [myInterests],
    }

Otherwise, it looks for the exact matches using the 2D array.

Working playground => https://mongoplayground.net/p/D2_JwvBUn3k

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