Steps to reproduce

app.service('users').find({
  query: {
    $and: [{
      $anything: 'function () { }'
    }]
  },
})

Expected behavior

Keys prefixed with $ that are not in options.filters and options.whitelist should throw an error, even when being used in an object within an array of the query.

Actual behavior

MongoError: unknown top level operator: $anything MongoError: unknown top level operator: $anything

System configuration

Tell us about the applicable parts of your setup.

Module versions (especially the part that's not working): All

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