Posting JSON to Flask results in 400 Bad Request error

Question

I have a post that works getting a json with the parameters and the columns to get from MongoDB, but when I\'m trying to do a LIKE using mongo syntax, it throws:

Answer 1

You didn't post valid JSON. All string values, including keys in objects, need to be quoted. You did not quote $regex.

{"parameters":{"AddressLine1":{"$regex":"Rio"}},"columns":{"SalesOrderID":1,"TotalDue":1}}

If Flask can't decode the JSON data, it raises a 400 error because the request is invalid.