本文整理汇总了Python中qgis.core.QgsVirtualLayerDefinition.fromUrl方法的典型用法代码示例。如果您正苦于以下问题：Python QgsVirtualLayerDefinition.fromUrl方法的具体用法？Python QgsVirtualLayerDefinition.fromUrl怎么用？Python QgsVirtualLayerDefinition.fromUrl使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsVirtualLayerDefinition的用法示例。
在下文中一共展示了QgsVirtualLayerDefinition.fromUrl方法的2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: test1
# 需要导入模块: from qgis.core import QgsVirtualLayerDefinition [as 别名]
# 或者: from qgis.core.QgsVirtualLayerDefinition import fromUrl [as 别名]
def test1(self):
d = QgsVirtualLayerDefinition()
self.assertEqual(d.toString(), "")
d.setFilePath("/file")
self.assertEqual(d.toString(), "/file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "/file")
d.setFilePath("C:\\file")
self.assertEqual(d.toString(), "C:%5Cfile")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "C:\\file")
d.setQuery("SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), "SELECT * FROM mytable")
q = u"SELECT * FROM tableéé /*:int*/"
d.setQuery(q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), q)
s1 = u"file://foo&bar=okié"
d.addSource("name", s1, "provider", "utf8")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[0].source(), s1)
n1 = u"éé ok"
d.addSource(n1, s1, "provider")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[1].name(), n1)
d.addSource("ref1", "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[2].reference(), "id0001")
d.setGeometryField("geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryField(), "geom")
d.setGeometryWkbType(QgsWKBTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryWkbType(), QgsWKBTypes.Point)
f = QgsFields()
f.append(QgsField("a", QVariant.Int))
f.append(QgsField("f", QVariant.Double))
f.append(QgsField("s", QVariant.String))
d.setFields(f)
f2 = QgsVirtualLayerDefinition.fromUrl(d.toUrl()).fields()
self.assertEqual(f[0].name(), f2[0].name())
self.assertEqual(f[0].type(), f2[0].type())
self.assertEqual(f[1].name(), f2[1].name())
self.assertEqual(f[1].type(), f2[1].type())
self.assertEqual(f[2].name(), f2[2].name())
self.assertEqual(f[2].type(), f2[2].type())示例2: getQueryGeometryName
# 需要导入模块: from qgis.core import QgsVirtualLayerDefinition [as 别名]
# 或者: from qgis.core.QgsVirtualLayerDefinition import fromUrl [as 别名]
def getQueryGeometryName(sqlite_file):
# introspect the file
with sqlite3_connection(sqlite_file) as conn:
c = conn.cursor()
for r in c.execute("SELECT url FROM _meta"):
d = QgsVirtualLayerDefinition.fromUrl(QUrl(r[0]))
if d.hasDefinedGeometry():
return d.geometryField()
return None