Cannot parse JSON Number into Decimal

[VersBinarii]

Steps to Reproduce the Problem

Currently the following request type in a handler:

#[derive(Debug, NewType)]
struct Amount(Decimal);

#[derive(Debug, Object)]
struct MyRequest {
    amount: Amount,
}

Will result in an:

parse request payload error: Expected input type "string(decimal)", found 2. (occurred while parsing "MyRequest")

When following data is sent in request:

curl -is localhost:8080/get_amount -XPOST -H "Content-Type: application/json" -d '{"amount": 2}' -v

The PR fixes it on my machine ;)

Specifications

• Version: 2.0.21
• Platform: MacOS/Linux