本文整理匯總了Python中qgis.core.QgsValueRelationFieldFormatter.representValue方法的典型用法代碼示例。如果您正苦於以下問題：Python QgsValueRelationFieldFormatter.representValue方法的具體用法？Python QgsValueRelationFieldFormatter.representValue怎麽用？Python QgsValueRelationFieldFormatter.representValue使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類qgis.core.QgsValueRelationFieldFormatter的用法示例。
在下文中一共展示了QgsValueRelationFieldFormatter.representValue方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: test_representValue
# 需要導入模塊: from qgis.core import QgsValueRelationFieldFormatter [as 別名]
# 或者: from qgis.core.QgsValueRelationFieldFormatter import representValue [as 別名]
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().addMapLayer(second_layer)
f = QgsFeature()
f.setAttributes([123])
first_layer.dataProvider().addFeatures([f])
f = QgsFeature()
f.setAttributes([123, 'decoded_val'])
second_layer.dataProvider().addFeatures([f])
fieldFormatter = QgsValueRelationFieldFormatter()
# Everything valid
config = {'Layer': second_layer.id(), 'Key': 'pkid', 'Value': 'decoded'}
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '123'), 'decoded_val')
# Code not find match in foreign layer
config = {'Layer': second_layer.id(), 'Key': 'pkid', 'Value': 'decoded'}
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '(456)')
# Missing Layer
config = {'Key': 'pkid', 'Value': 'decoded'}
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '(456)')
# Invalid Layer
config = {'Layer': 'invalid', 'Key': 'pkid', 'Value': 'decoded'}
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '(456)')
# Invalid Key
config = {'Layer': second_layer.id(), 'Key': 'invalid', 'Value': 'decoded'}
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '(456)')
# Invalid Value
config = {'Layer': second_layer.id(), 'Key': 'pkid', 'Value': 'invalid'}
self.assertEqual(fieldFormatter.representValue(first_layer, 0, config, None, '456'), '(456)')
QgsProject.instance().removeMapLayer(second_layer.id())