def test_representValue(self):
first_layer = QgsVectorLayer("none?field=foreign_key:integer",
"first_layer", "memory")
self.assertTrue(first_layer.isValid())
second_layer = QgsVectorLayer("none?field=pkid:integer&field=decoded:string",
"second_layer", "memory")
self.assertTrue(second_layer.isValid())
QgsProject.instance().addMapLayers([first_layer, second_layer])
f = QgsFeature()
f.setAttributes([123])
first_layer.dataProvider().addFeatures([f])
f = QgsFeature()
f.setAttributes([123, 'decoded_val'])
second_layer.dataProvider().addFeatures([f])
relMgr = QgsProject.instance().relationManager()
fieldFormatter = QgsRelationReferenceFieldFormatter()
rel = QgsRelation()
rel.setId('rel1')
rel.setName('Relation Number One')
rel.setReferencingLayer(first_layer.id())
rel.setReferencedLayer(second_layer.id())
rel.addFieldPair('foreign_key', 'pkid')
self.assertTrue(rel.isValid())
relMgr.addRelation(rel)
# Everything valid
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), 'decoded_val')
# Code not find match in foreign layer
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '456')
# Invalid relation id
config = {'Relation': 'invalid'}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# No display expression
config = {'Relation': rel.id()}
second_layer.setDisplayExpression(None)
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# Invalid display expression
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('invalid +')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# Missing relation
config = {}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# Inconsistent layer provided to representValue()
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(second_layer, 0, config, None, '123'), '123')
# Inconsistent idx provided to representValue()
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 1, config, None, '123'), '123')
# Invalid relation
rel = QgsRelation()
rel.setId('rel2')
rel.setName('Relation Number Two')
rel.setReferencingLayer(first_layer.id())
rel.addFieldPair('foreign_key', 'pkid')
self.assertFalse(rel.isValid())
relMgr.addRelation(rel)
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
QgsProject.instance().removeAllMapLayers()
def test_representValue(self):
first_layer = QgsVectorLayer("none?field=foreign_key:integer",
"first_layer", "memory")
self.assertTrue(first_layer.isValid())
second_layer = QgsVectorLayer("none?field=pkid:integer&field=decoded:string",
"second_layer", "memory")
self.assertTrue(second_layer.isValid())
QgsProject.instance().addMapLayers([first_layer, second_layer])
f = QgsFeature()
f.setAttributes([123])
first_layer.dataProvider().addFeatures([f])
f = QgsFeature()
f.setAttributes([123, 'decoded_val'])
second_layer.dataProvider().addFeatures([f])
relMgr = QgsProject.instance().relationManager()
fieldFormatter = QgsRelationReferenceFieldFormatter()
rel = QgsRelation()
rel.setId('rel1')
rel.setName('Relation Number One')
rel.setReferencingLayer(first_layer.id())
rel.setReferencedLayer(second_layer.id())
rel.addFieldPair('foreign_key', 'pkid')
self.assertTrue(rel.isValid())
relMgr.addRelation(rel)
# Everything valid
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), 'decoded_val')
# Code not find match in foreign layer
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '456')
# Invalid relation id
config = {'Relation': 'invalid'}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# No display expression
config = {'Relation': rel.id()}
second_layer.setDisplayExpression(None)
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# Invalid display expression
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('invalid +')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# Missing relation
config = {}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
# Inconsistent layer provided to representValue()
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(second_layer, 0, config, None, '123'), '123')
# Inconsistent idx provided to representValue()
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 1, config, None, '123'), '123')
# Invalid relation
rel = QgsRelation()
rel.setId('rel2')
rel.setName('Relation Number Two')
rel.setReferencingLayer(first_layer.id())
rel.addFieldPair('foreign_key', 'pkid')
self.assertFalse(rel.isValid())
relMgr.addRelation(rel)
config = {'Relation': rel.id()}
second_layer.setDisplayExpression('decoded')
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), '123')
QgsProject.instance().removeAllMapLayers()