QQmlError Class

The QQmlError class encapsulates a QML error. More...

Header:	#include <QQmlError>
CMake:	find_package(Qt6 COMPONENTS Qml REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Qml)
qmake:	QT += qml
Since:	Qt 5.0

• List of all members, including inherited members

Public Functions

	QQmlError(const QQmlError &other)
	QQmlError()
QQmlError &	operator=(const QQmlError &other)
int	column() const
QString	description() const
bool	isValid() const
int	line() const
QtMsgType	messageType() const
QObject *	object() const
void	setColumn(int column)
void	setDescription(const QString &description)
void	setLine(int line)
void	setMessageType(QtMsgType messageType)
void	setObject(QObject *object)
void	setUrl(const QUrl &url)
QString	toString() const
QUrl	url() const

Related Non-Members

QDebug

operator<<(QDebug debug, const QQmlError &error)

Detailed Description

QQmlError includes a textual description of the error, as well as location information (the file, line, and column). The toString() method creates a single-line, human-readable string containing all of this information, for example:

file:///home/user/test.qml:7:8: Invalid property assignment: double expected

You can use qDebug(), qInfo(), or qWarning() to output errors to the console. This method will attempt to open the file indicated by the error and include additional contextual information.

file:///home/user/test.qml:7:8: Invalid property assignment: double expected
        y: "hello"
           ^

See also QQuickView::errors() and QQmlComponent::errors().

Member Function Documentation

QQmlError::QQmlError(const QQmlError &other)

Creates a copy of other.

QQmlError::QQmlError()

Creates an empty error object.

QQmlError &QQmlError::operator=(const QQmlError &other)

Assigns other to this error object.

int QQmlError::column() const

Returns the error column number.

See also setColumn().

QString QQmlError::description() const

Returns the error description.

See also setDescription().

bool QQmlError::isValid() const

Returns true if this error is valid, otherwise false.

int QQmlError::line() const

Returns the error line number.

See also setLine().

[since 5.9] QtMsgType QQmlError::messageType() const

Returns the message type.

This function was introduced in Qt 5.9.

See also setMessageType().

QObject *QQmlError::object() const

Returns the nearest object where this error occurred. Exceptions in bound property expressions set this to the object to which the property belongs. It will be 0 for all other exceptions.

See also setObject().

void QQmlError::setColumn(int column)

Sets the error column number.

See also column().

void QQmlError::setDescription(const QString &description)

Sets the error description.

See also description().

void QQmlError::setLine(int line)

Sets the error line number.

See also line().

[since 5.9] void QQmlError::setMessageType(QtMsgType messageType)

Sets the messageType for this message. The message type determines which QDebug handlers are responsible for receiving the message.

This function was introduced in Qt 5.9.

See also messageType().

void QQmlError::setObject(QObject *object)

Sets the nearest object where this error occurred.

See also object().

void QQmlError::setUrl(const QUrl &url)

Sets the url for the file that caused this error.

See also url().

QString QQmlError::toString() const

Returns the error as a human readable string.

QUrl QQmlError::url() const

Returns the url for the file that caused this error.

See also setUrl().