[CPPREST] [C++] Required string fields are not handled properly in the cpprest generator

Description

In ModelBase.cpp, the default code generated for stringFromJson() is:

utility::string_t ModelBase::stringFromJson(web::json::value& val)
{
return val.is_string() ? val.as_string() : U("");
}

As you can see, this supplies an empty string when no value is given.

However, this is a problem if the field is flagged as a required field. If a required string field is missing, instead of getting a 500 Internal error response, the field is given a default value of "" and processed onward.

Swagger-codegen version

Using the new online editor on 13-JUL-2017. 3.x maybe?

Swagger declaration file content or url

 ExampleContext:
    type: object
    required:
      - taskName
      - examName
    properties:
      taskName:
        type: string
      examName:
        type: string

Command line used for generation

Steps to reproduce

Related issues

Suggest a Fix

Start by locating the C++ generator template or entry point that produces ModelBase.cpp and inspect stringFromJson(). Reproduce the behavior with the provided YAML containing required taskName and examName fields. Done means a missing required string is not silently converted to an empty string and processed onward.