MongoDB $gt/$lt operators with prices stored as strings

Question

I\'m trying to query my database for prices greater than/less than a user specified number. In my database, prices are stored like so:

{price: \"300.00\"}
         


        

Answer 1

If you have newer version of mongodb then you can do this:

$expr: {
          $gt: [
             { $convert: { input: '$price', to: 'decimal' } },
             { $convert: { input: '0.0', to: 'decimal' } }
               ]
              }

$expr operator: https://docs.mongodb.com/manual/reference/operator/query/expr/

$convert opetator: https://docs.mongodb.com/manual/reference/operator/aggregation/convert/index.html