query : how to handle nesting in body section of post method

Hi Team,

I have started using 'needle' recently instead of 'request' module. One of the API call (to select data from database) includes complex input:

1. Database model - simple string
2. Database input - object or array of objects (with $or, $and operators)

For e.g.

let options = {
    json: true,
    model: "SampleModel",
    _**input: {
                $or: [
                    { where_field1: 'abc' },
                    { where_field2: '123' }
                ]
            }**_
}

'request' was able to handle it properly and fetch the data. But needle gets stuck during the call.

If I pass it a simple object, like shown below, it works.

_**input: { where_field1: 'abc' }**_

How to handle it?

Start at Needle's POST body handling entry point and reproduce issue #302 with the nested $or input, then compare it with the simple object case that works. Check whether the nested object or array is handled differently from the request module; done means the complex input completes successfully without getting stuck.