[go-experimental] Fix error message when unmarshaling wrong enum value (#6663)

* Use actual value in error message

* Generate samples

modules/openapi-generator/src/main/resources/go-experimental/model_enum.mustache

@@ -26,7 +26,7 @@ func (v *{{{classname}}}) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid {{classname}}", *v)
+	return fmt.Errorf("%+v is not a valid {{classname}}", value)
 }
 
 // Ptr returns reference to {{{name}}} value

samples/client/petstore/go-experimental/go-petstore/model_enum_class.go

@@ -38,7 +38,7 @@ func (v *EnumClass) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid EnumClass", *v)
+	return fmt.Errorf("%+v is not a valid EnumClass", value)
 }
 
 // Ptr returns reference to EnumClass value

samples/client/petstore/go-experimental/go-petstore/model_outer_enum.go

@@ -38,7 +38,7 @@ func (v *OuterEnum) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid OuterEnum", *v)
+	return fmt.Errorf("%+v is not a valid OuterEnum", value)
 }
 
 // Ptr returns reference to OuterEnum value

samples/openapi3/client/petstore/go-experimental/go-petstore/model_enum_class.go

@@ -38,7 +38,7 @@ func (v *EnumClass) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid EnumClass", *v)
+	return fmt.Errorf("%+v is not a valid EnumClass", value)
 }
 
 // Ptr returns reference to EnumClass value

samples/openapi3/client/petstore/go-experimental/go-petstore/model_outer_enum.go

@@ -38,7 +38,7 @@ func (v *OuterEnum) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid OuterEnum", *v)
+	return fmt.Errorf("%+v is not a valid OuterEnum", value)
 }
 
 // Ptr returns reference to OuterEnum value

samples/openapi3/client/petstore/go-experimental/go-petstore/model_outer_enum_default_value.go

@@ -38,7 +38,7 @@ func (v *OuterEnumDefaultValue) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid OuterEnumDefaultValue", *v)
+	return fmt.Errorf("%+v is not a valid OuterEnumDefaultValue", value)
 }
 
 // Ptr returns reference to OuterEnumDefaultValue value

samples/openapi3/client/petstore/go-experimental/go-petstore/model_outer_enum_integer.go

@@ -38,7 +38,7 @@ func (v *OuterEnumInteger) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid OuterEnumInteger", *v)
+	return fmt.Errorf("%+v is not a valid OuterEnumInteger", value)
 }
 
 // Ptr returns reference to OuterEnumInteger value

samples/openapi3/client/petstore/go-experimental/go-petstore/model_outer_enum_integer_default_value.go

@@ -38,7 +38,7 @@ func (v *OuterEnumIntegerDefaultValue) UnmarshalJSON(src []byte) error {
 		}
 	}
 
-	return fmt.Errorf("%+v is not a valid OuterEnumIntegerDefaultValue", *v)
+	return fmt.Errorf("%+v is not a valid OuterEnumIntegerDefaultValue", value)
 }
 
 // Ptr returns reference to OuterEnumIntegerDefaultValue value