Class: QgsExpressionNodeColumnRef

An expression node which takes it value from a feature’s field.

Class Hierarchy

Inheritance diagram of qgis.core.QgsExpressionNodeColumnRef

Base classes

QgsExpressionNode

Abstract base class for all nodes that can appear in an expression.

Methods

evalNode

name

The name of the column.

prepareNode

class qgis.core.QgsExpressionNodeColumnRef[source]

Bases: QgsExpressionNode

__init__(name: str | None)

Constructor for QgsExpressionNodeColumnRef, referencing the column with the specified name.

Parameters:

name (Optional[str])

__init__(a0: QgsExpressionNodeColumnRef)
Parameters:

a0 (QgsExpressionNodeColumnRef)

evalNode(self, parent: QgsExpression | None, context: QgsExpressionContext | None) → Any[source]
Parameters:
Return type:

Any

name(self) → str[source]

The name of the column.

Return type:

str

prepareNode(self, parent: QgsExpression | None, context: QgsExpressionContext | None) → bool[source]
Parameters:
Return type:

bool