Nested matching appears to be broken

I just wanted to start by saying thanks again for a great lib!

I’ve been trying to upgrade the sift dependency for mson from version sift 9.0.0. Unfortunately, I’m seeing a number of issues. I dug into a particular problem and am seeing an issue with matching nested queries, e.g. the following filter doesn’t capture any values with sift v13.1.10. It does however work with sift v9.0.0:

import sift from "sift";

const where = {
  fields: {
    firstName: {
      value: {
        $eq: "Jimmy"
      }
    }
  }
};

const whereProps = {
  fields: {
    firstName: {
      value: "Jimmy"
    }
  }
};

const sifted = [whereProps].filter(sift(where));
console.log({ sifted });

Here’s a codesandbox for it not working in v13.1.10. And one for it working in v9.0.0

I haven’t had a chance yet to identify a root cause yet.

[redgeoff]

OK, I think I follow now. Here you can see that the nesting does not work, but the dot notation does work.

For GitHub, here are the details of the mongoplayground that illustrates that nested searching doesn’t work in MongoDB:

Configuration:

[
  {
    fields: {
      firstName: {
        value: "Jimmy"
      }
    }
  }
]

Query:

db.collection.find({
  fields: {
    firstName: {
      value: {
        $eq: "Jimmy"
      }
    }
  }
})

=> The Query doesn’t return any results

Thanks for the help!

[crcn]

Sorry for the confusion here – MongoDB in this case is treating $eq has a prop. Here’s a better example: https://mongoplayground.net/p/0UIcUQl8Z3v