- Qt 6.8
- Qt Protobuf
- C++ Classes
- QProtobufSerializer
- Qt 6.8.3 Reference Documentation

# QProtobufSerializer Class

The QProtobufSerializer class is interface that represents basic functions for serialization/deserialization. More...

Header: | `#include <QProtobufSerializer>`
CMake: | `find_package(Qt6 REQUIRED COMPONENTS Protobuf)` `target_link_libraries(mytarget PRIVATE Qt6::Protobuf)`
Since: | Qt 6.5
Inherits: | QAbstractProtobufSerializer

- List of all members, including inherited members

## Public Functions

| QProtobufSerializer()
virtual | ~QProtobufSerializer() override
`(since 6.7)` void | shouldPreserveUnknownFields(bool preserveUnknownFields)

## Reimplemented Public Functions

virtual QAbstractProtobufSerializer::Error | lastError() const override
virtual QString | lastErrorString() const override

## Detailed Description

The QProtobufSerializer class registers serializers/deserializers for classes implementing a protobuf message, inheriting QProtobufMessage. These classes are generated automatically, based on a `.proto` file, using the CMake function qt_add_protobuf or by running qtprotobufgen directly.

## Member Function Documentation

### QProtobufSerializer::QProtobufSerializer()

Constructs a new serializer instance.

### `[override virtual noexcept]` QProtobufSerializer::~QProtobufSerializer()

Destroys the serializer instance.

### `[override virtual]` QAbstractProtobufSerializer::Error QProtobufSerializer::lastError() const

Reimplements: QAbstractProtobufSerializer::lastError() const.

Returns the last deserialization error for the serializer instance.

See also lastErrorString().

### `[override virtual]` QString QProtobufSerializer::lastErrorString() const

Reimplements: QAbstractProtobufSerializer::lastErrorString() const.

Returns the last deserialization error string for the serializer instance.

See also lastError().

### `[since 6.7]` void QProtobufSerializer::shouldPreserveUnknownFields(bool preserveUnknownFields)

Controls whether the unknown fields received from the wire should be stored in the resulting message or if it should be omitted, based on preserveUnknownFields.

This function was introduced in Qt 6.7.