QgsUnsetAttributeValue Class Reference

Represents a default, "not-specified" value for a feature attribute. More...

#include <qgsunsetattributevalue.h>

Public Member Functions
	QgsUnsetAttributeValue ()=default
	Constructor for a QgsUnsetAttributeValue.
	QgsUnsetAttributeValue (const QString &defaultValueClause)
	Constructor for a QgsUnsetAttributeValue, with the specified original provider's default value clause.
QString	defaultValueClause () const
	Returns the original data provider's default value clause.
	operator QVariant () const
	Allows direct construction of QVariants from unset values.
bool	operator!= (const QgsUnsetAttributeValue &) const
	QgsUnsetAttributeValues are always considered equal to each other, regardless of what the original provider's default value clause was.
bool	operator== (const QgsUnsetAttributeValue &) const
	QgsUnsetAttributeValues are always considered equal to each other, regardless of what the original provider's default value clause was.

Detailed Description

Represents a default, "not-specified" value for a feature attribute.

Since

QGIS 3.28

Definition at line 31 of file qgsunsetattributevalue.h.

Constructor & Destructor Documentation

QgsUnsetAttributeValue() [1/2]

QgsUnsetAttributeValue::QgsUnsetAttributeValue ( )

default

Constructor for a QgsUnsetAttributeValue.

QgsUnsetAttributeValue() [2/2]

QgsUnsetAttributeValue::QgsUnsetAttributeValue ( const QString &  defaultValueClause )

explicit

Constructor for a QgsUnsetAttributeValue, with the specified original provider's default value clause.

Definition at line 20 of file qgsunsetattributevalue.cpp.

Member Function Documentation

defaultValueClause()

QString QgsUnsetAttributeValue::defaultValueClause ( ) const

inline

Returns the original data provider's default value clause.

Definition at line 48 of file qgsunsetattributevalue.h.

operator QVariant()

QgsUnsetAttributeValue::operator QVariant ( ) const

inline

Allows direct construction of QVariants from unset values.

Definition at line 73 of file qgsunsetattributevalue.h.

operator!=()

bool QgsUnsetAttributeValue::operator!= ( const QgsUnsetAttributeValue &  ) const

inline

QgsUnsetAttributeValues are always considered equal to each other, regardless of what the original provider's default value clause was.

Definition at line 58 of file qgsunsetattributevalue.h.

operator==()

bool QgsUnsetAttributeValue::operator== ( const QgsUnsetAttributeValue &  ) const

inline

QgsUnsetAttributeValues are always considered equal to each other, regardless of what the original provider's default value clause was.

Definition at line 53 of file qgsunsetattributevalue.h.

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The documentation for this class was generated from the following files:

• /home/fischer/src/qgis-3.38/src/core/qgsunsetattributevalue.h
• /home/fischer/src/qgis-3.38/src/core/qgsunsetattributevalue.cpp