本文整理汇总了Python中qgis.core.QgsDataSourceUri.setUseEstimatedMetadata方法的典型用法代码示例。如果您正苦于以下问题：Python QgsDataSourceUri.setUseEstimatedMetadata方法的具体用法？Python QgsDataSourceUri.setUseEstimatedMetadata怎么用？Python QgsDataSourceUri.setUseEstimatedMetadata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.QgsDataSourceUri的用法示例。
在下文中一共展示了QgsDataSourceUri.setUseEstimatedMetadata方法的5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: uri_from_name
# 需要导入模块: from qgis.core import QgsDataSourceUri [as 别名]
# 或者: from qgis.core.QgsDataSourceUri import setUseEstimatedMetadata [as 别名]
def uri_from_name(conn_name):
settings = QgsSettings()
settings.beginGroup(u"/PostgreSQL/connections/%s" % conn_name)
if not settings.contains("database"): # non-existent entry?
raise QgsProcessingException(QCoreApplication.translate("PostGIS", 'There is no defined database connection "{0}".').format(conn_name))
uri = QgsDataSourceUri()
settingsList = ["service", "host", "port", "database", "username", "password", "authcfg"]
service, host, port, database, username, password, authcfg = [settings.value(x, "", type=str) for x in settingsList]
useEstimatedMetadata = settings.value("estimatedMetadata", False, type=bool)
try:
sslmode = settings.value("sslmode", QgsDataSourceUri.SslPrefer, type=int)
except TypeError:
sslmode = QgsDataSourceUri.SslPrefer
settings.endGroup()
if hasattr(authcfg, 'isNull') and authcfg.isNull():
authcfg = ''
if service:
uri.setConnection(service, database, username, password, sslmode, authcfg)
else:
uri.setConnection(host, port, database, username, password, sslmode, authcfg)
uri.setUseEstimatedMetadata(useEstimatedMetadata)
return uri示例2: connect
# 需要导入模块: from qgis.core import QgsDataSourceUri [as 别名]
# 或者: from qgis.core.QgsDataSourceUri import setUseEstimatedMetadata [as 别名]
def connect(self, parent=None):
conn_name = self.connectionName()
settings = QgsSettings()
settings.beginGroup(u"/%s/%s" % (self.connectionSettingsKey(), conn_name))
if not settings.contains("database"): # non-existent entry?
raise InvalidDataException(self.tr('There is no defined database connection "{0}".').format(conn_name))
from qgis.core import QgsDataSourceUri
uri = QgsDataSourceUri()
settingsList = ["service", "host", "port", "database", "username", "password", "authcfg"]
service, host, port, database, username, password, authcfg = [settings.value(x, "", type=str) for x in settingsList]
useEstimatedMetadata = settings.value("estimatedMetadata", False, type=bool)
sslmode = settings.value("sslmode", QgsDataSourceUri.SslPrefer, type=int)
settings.endGroup()
if hasattr(authcfg, 'isNull') and authcfg.isNull():
authcfg = ''
if service:
uri.setConnection(service, database, username, password, sslmode, authcfg)
else:
uri.setConnection(host, port, database, username, password, sslmode, authcfg)
uri.setUseEstimatedMetadata(useEstimatedMetadata)
try:
return self.connectToUri(uri)
except ConnectionError:
return False示例3: uri_from_name
# 需要导入模块: from qgis.core import QgsDataSourceUri [as 别名]
# 或者: from qgis.core.QgsDataSourceUri import setUseEstimatedMetadata [as 别名]
def uri_from_name(conn_name):
settings = QSettings()
settings.beginGroup(u"/PostgreSQL/connections/%s" % conn_name)
if not settings.contains("database"): # non-existent entry?
raise DbError('There is no defined database connection "%s".' % conn_name)
uri = QgsDataSourceUri()
settingsList = ["service", "host", "port", "database", "username", "password", "authcfg"]
service, host, port, database, username, password, authcfg = [settings.value(x, "", type=str) for x in settingsList]
useEstimatedMetadata = settings.value("estimatedMetadata", False, type=bool)
sslmode = settings.value("sslmode", QgsDataSourceUri.SSLprefer, type=int)
settings.endGroup()
if service:
uri.setConnection(service, database, username, password, sslmode, authcfg)
else:
uri.setConnection(host, port, database, username, password, sslmode, authcfg)
uri.setUseEstimatedMetadata(useEstimatedMetadata)
return uri示例4: postgis_path_to_uri
# 需要导入模块: from qgis.core import QgsDataSourceUri [as 别名]
# 或者: from qgis.core.QgsDataSourceUri import setUseEstimatedMetadata [as 别名]
def postgis_path_to_uri(path):
"""Convert layer path from QgsBrowserModel to full QgsDataSourceUri.
:param path: The layer path from QgsBrowserModel
:type path: string
:returns: layer uri.
:rtype: QgsDataSourceUri
"""
connection_name = path.split('/')[1]
schema = path.split('/')[2]
table_name = path.split('/')[3]
settings = QSettings()
key = "/PostgreSQL/connections/" + connection_name
service = settings.value(key + "/service")
host = settings.value(key + "/host")
port = settings.value(key + "/port")
if not port:
port = "5432"
db = settings.value(key + "/database")
use_estimated_metadata = settings.value(
key + "/estimatedMetadata", False, type=bool)
sslmode = settings.value(
key + "/sslmode", QgsDataSourceUri.SSLprefer, type=int)
username = ""
password = ""
if settings.value(key + "/saveUsername") == "true":
username = settings.value(key + "/username")
if settings.value(key + "/savePassword") == "true":
password = settings.value(key + "/password")
# Old save setting
if settings.contains(key + "/save"):
username = settings.value(key + "/username")
if settings.value(key + "/save") == "true":
password = settings.value(key + "/password")
uri = QgsDataSourceUri()
if service:
uri.setConnection(service, db, username, password, sslmode)
else:
uri.setConnection(host, port, db, username, password, sslmode)
uri.setUseEstimatedMetadata(use_estimated_metadata)
# Obtain the geometry column name
connector = PostGisDBConnector(uri)
tables = connector.getVectorTables(schema)
tables = [table for table in tables if table[1] == table_name]
if not tables:
return None
table = tables[0]
geom_col = table[8]
uri.setDataSource(schema, table_name, geom_col)
return uri示例5: connect
# 需要导入模块: from qgis.core import QgsDataSourceUri [as 别名]
# 或者: from qgis.core.QgsDataSourceUri import setUseEstimatedMetadata [as 别名]
def connect(self, parent=None):
conn_name = self.connectionName()
settings = QSettings()
settings.beginGroup(u"/{0}/{1}".format(
self.connectionSettingsKey(), conn_name))
if not settings.contains("database"): # non-existent entry?
raise InvalidDataException(
self.tr('There is no defined database connection "{}".'.format(
conn_name)))
from qgis.core import QgsDataSourceUri
uri = QgsDataSourceUri()
settingsList = ["host", "port", "database", "username", "password"]
host, port, database, username, password = [settings.value(x, "", type=str) for x in settingsList]
# get all of the connexion options
useEstimatedMetadata = settings.value(
"estimatedMetadata", False, type=bool)
uri.setParam('userTablesOnly', str(
settings.value("userTablesOnly", False, type=bool)))
uri.setParam('geometryColumnsOnly', str(
settings.value("geometryColumnsOnly", False, type=bool)))
uri.setParam('allowGeometrylessTables', str(
settings.value("allowGeometrylessTables", False, type=bool)))
uri.setParam('onlyExistingTypes', str(
settings.value("onlyExistingTypes", False, type=bool)))
uri.setParam('includeGeoAttributes', str(
settings.value("includeGeoAttributes", False, type=bool)))
settings.endGroup()
uri.setConnection(host, port, database, username, password)
uri.setUseEstimatedMetadata(useEstimatedMetadata)
err = u""
try:
return self.connectToUri(uri)
except ConnectionError as e:
err = str(e)
# ask for valid credentials
max_attempts = 3
for i in range(max_attempts):
(ok, username, password) = QgsCredentials.instance().get(
uri.connectionInfo(False), username, password, err)
if not ok:
return False
uri.setConnection(host, port, database, username, password)
try:
self.connectToUri(uri)
except ConnectionError as e:
if i == max_attempts - 1: # failed the last attempt
raise e
err = str(e)
continue
QgsCredentials.instance().put(
uri.connectionInfo(False), username, password)
return True
return False