本文整理汇总了Python中qgis.core.QgsValueRelationFieldFormatter类的典型用法代码示例。如果您正苦于以下问题：Python QgsValueRelationFieldFormatter类的具体用法？Python QgsValueRelationFieldFormatter怎么用？Python QgsValueRelationFieldFormatter使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了QgsValueRelationFieldFormatter类的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_representValue
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())示例2: test_expressionRequiresFormScope
def test_expressionRequiresFormScope(self):
res = list(QgsValueRelationFieldFormatter.expressionFormAttributes("current_value('ONE') AND current_value('TWO')"))
res = sorted(res)
self.assertEqual(res, ['ONE', 'TWO'])
res = list(QgsValueRelationFieldFormatter.expressionFormVariables("@current_geometry"))
self.assertEqual(res, ['current_geometry'])
self.assertFalse(QgsValueRelationFieldFormatter.expressionRequiresFormScope(""))
self.assertTrue(QgsValueRelationFieldFormatter.expressionRequiresFormScope("current_value('TWO')"))
self.assertTrue(QgsValueRelationFieldFormatter.expressionRequiresFormScope("current_value ( 'TWO' )"))
self.assertTrue(QgsValueRelationFieldFormatter.expressionRequiresFormScope("@current_geometry"))
self.assertTrue(QgsValueRelationFieldFormatter.expressionIsUsable("", QgsFeature()))
self.assertFalse(QgsValueRelationFieldFormatter.expressionIsUsable("@current_geometry", QgsFeature()))
self.assertFalse(QgsValueRelationFieldFormatter.expressionIsUsable("current_value ( 'TWO' )", QgsFeature()))
layer = QgsVectorLayer("none?field=pkid:integer&field=decoded:string",
"layer", "memory")
self.assertTrue(layer.isValid())
QgsProject.instance().addMapLayer(layer)
f = QgsFeature(layer.fields())
f.setAttributes([1, 'value'])
point = QgsGeometry.fromPointXY(QgsPointXY(123, 456))
f.setGeometry(point)
self.assertTrue(QgsValueRelationFieldFormatter.expressionIsUsable("current_geometry", f))
self.assertFalse(QgsValueRelationFieldFormatter.expressionIsUsable("current_value ( 'TWO' )", f))
self.assertTrue(QgsValueRelationFieldFormatter.expressionIsUsable("current_value ( 'pkid' )", f))
self.assertTrue(QgsValueRelationFieldFormatter.expressionIsUsable("@current_geometry current_value ( 'pkid' )", f))
QgsProject.instance().removeMapLayer(layer.id())示例3: _test
def _test(a, b):
self.assertEqual(QgsValueRelationFieldFormatter.valueToStringList(a), b)