[C++][Pistache-server] Wrong "toJson" and "fromJson" method generation - compilation failed

Description

The C++ generated code does not compile because of the following errors:

1. there is no matching function for ModelBase::toJson taking as argument std::map<std::string, std::vector<Point2D>>
2. the generated code is calling “fromJson” method as it is a member of std::map type
3. the generated code is calling a set method that is not generated

These error occur in model/Detections.cpp file.

Detection.h:

#include "ModelBase.h"

#include "BoundingRectangle.h"
#include <string>
#include "Point2D.h"
#include <map>
#include <vector>

namespace org {
namespace openapitools {
namespace server {
namespace model {

class  Detection
    : public ModelBase
{
public:
    Detection();
    virtual ~Detection();

    nlohmann::json toJson() const override;
    void fromJson(nlohmann::json& json) override;
 
    std::map<std::string, std::vector<Point2D>>& getKeyPoints();
    //setKeyPoints is missing
    bool keyPointsIsSet() const;
    void unsetKeyPoints();


protected:
   
    std::map<std::string, std::vector<Point2D>> m_KeyPoints;
    bool m_KeyPointsIsSet;
 
};

}
}
}
}

#endif /* Detection_H_ */

Detection.cpp:

nlohmann::json Detection::toJson() const
{
    //
    //
    if(m_KeyPointsIsSet)
    {
          //this call
        val["keyPoints"] = ModelBase::toJson(m_KeyPoints);
    }
   //
   //
    return val;
}

void Detection::fromJson(nlohmann::json& val)
{
    //
    //
    if(val.find("keyPoints") != val.end())
    {
        if(!val["keyPoints"].is_null())
        {
            std::map<std::string, std::vector<Point2D>> newItem;
            //and these 2 lines below
            newItem.fromJson(val["keyPoints"]);
            setKeyPoints( newItem );
        }
        
    }
}

openapi-generator version

3.2.0 (I cloned the latest master branch 2 days ago)

OpenAPI declaration file content or url

https://raw.githubusercontent.com/deepviss/deepviss-server-example/master/src/main/resources/deep-viss.json

Command line used for generation

Inside cloned repository, after mvn clean package: java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate / -i deep-viss.json / -g cpp-pistache-server / -o …/openapi-pistache-server

Steps to reproduce

Note: Assuming Pistache is installed

1. Go to output folder
2. copy json.hpp (from https://github.com/nlohmann/json) to model folder
3. mkdir build
4. cd build
5. cmake …
6. make

[etherealjoy]

I will take a look at this once I finish the other issue which is assigned to me.

[etherealjoy]

I tested it with #1359 and it worked.