class Machine(models.Model):
    machine_name            = models.CharField(max_length=120)

    def __str__(self):
        return self.machine_name

class Project(models.Model):
    project_name            = models.CharField(max_length=120)

    def __str__(self):
        return self.project_name

class Simulation(models.Model):
    user                    = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, default=1)
    machine                 = models.ForeignKey(Machine, on_delete=models.CASCADE, default=1)
    project                 = models.ForeignKey(Project, on_delete=models.CASCADE, default=1)

test_api_local(method="post", data={"machine":2, "project":1 })

class SimulationSerializer(serializers.ModelSerializer):
    machine = serializers.SerializerMethodField()
    project = serializers.SerializerMethodField()


    class Meta:
        model = Simulation

        fields = ('project',
                  'machine',
                  )

    def get_machine(self, obj):
        print(obj.machine)
        project_name = obj.project.project_name
        return str(project_name)