Class: QgsExpressionNodeColumnRef¶
-
class
qgis.core.
QgsExpressionNodeColumnRef
(name: str)¶ Bases:
QgsExpressionNode
Constructor for
QgsExpressionNodeColumnRef
, referencing the column with the specifiedname
.QgsExpressionNodeColumnRef(
QgsExpressionNodeColumnRef
)An expression node which takes it value from a feature’s field.
- Parameters
name –
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clone
(self) → QgsExpressionNode¶ - Return type
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dump
(self) → str¶ - Return type
str
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evalNode
(self, parent: QgsExpression, context: QgsExpressionContext) → Any¶ - Parameters
parent (QgsExpression) –
context (QgsExpressionContext) –
- Return type
Any
-
isStatic
(self, parent: QgsExpression, context: QgsExpressionContext) → bool¶ - Parameters
parent (QgsExpression) –
context (QgsExpressionContext) –
- Return type
bool
-
name
(self) → str¶ The name of the column.
- Return type
str
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needsGeometry
(self) → bool¶ - Return type
bool
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nodeType
(self) → QgsExpressionNode.NodeType¶ - Return type
-
prepareNode
(self, parent: QgsExpression, context: QgsExpressionContext) → bool¶ - Parameters
parent (QgsExpression) –
context (QgsExpressionContext) –
- Return type
bool
-
referencedColumns
(self) → Set[str]¶ - Return type
Set[str]
-
referencedFunctions
(self) → Set[str]¶ - Return type
Set[str]
-
referencedVariables
(self) → Set[str]¶ - Return type
Set[str]