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test_provider_postgres.py
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test_provider_postgres.py
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# -*- coding: utf-8 -*-
"""QGIS Unit tests for the postgres provider.
Note: to prepare the DB, you need to run the sql files specified in
tests/testdata/provider/testdata_pg.sh
Read tests/README.md about writing/launching tests with PostgreSQL.
Run with ctest -V -R PyQgsPostgresProvider
.. note:: This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
"""
from builtins import next
__author__ = 'Matthias Kuhn'
__date__ = '2015-04-23'
__copyright__ = 'Copyright 2015, The QGIS Project'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import qgis # NOQA
import psycopg2
import os
import time
from qgis.core import (
QgsVectorLayer,
QgsVectorLayerExporter,
QgsFeatureRequest,
QgsFeature,
QgsFieldConstraints,
QgsDataProvider,
NULL,
QgsVectorLayerUtils,
QgsSettings,
QgsTransactionGroup,
QgsReadWriteContext,
QgsRectangle,
QgsDefaultValue,
QgsCoordinateReferenceSystem,
QgsProject,
QgsWkbTypes,
QgsGeometry
)
from qgis.gui import QgsGui, QgsAttributeForm
from qgis.PyQt.QtCore import QDate, QTime, QDateTime, QVariant, QDir, QObject
from qgis.PyQt.QtWidgets import QLabel
from qgis.testing import start_app, unittest
from qgis.PyQt.QtXml import QDomDocument
from utilities import unitTestDataPath
from providertestbase import ProviderTestCase
QGISAPP = start_app()
TEST_DATA_DIR = unitTestDataPath()
class TestPyQgsPostgresProvider(unittest.TestCase, ProviderTestCase):
@classmethod
def setUpClass(cls):
"""Run before all tests"""
cls.dbconn = 'dbname=\'qgis_test\''
if 'QGIS_PGTEST_DB' in os.environ:
cls.dbconn = os.environ['QGIS_PGTEST_DB']
# Create test layers
cls.vl = QgsVectorLayer(cls.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POINT table="qgis_test"."someData" (geom) sql=', 'test', 'postgres')
assert cls.vl.isValid()
cls.source = cls.vl.dataProvider()
cls.poly_vl = QgsVectorLayer(cls.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POLYGON table="qgis_test"."some_poly_data" (geom) sql=', 'test', 'postgres')
assert cls.poly_vl.isValid()
cls.poly_provider = cls.poly_vl.dataProvider()
QgsGui.editorWidgetRegistry().initEditors()
cls.con = psycopg2.connect(cls.dbconn)
@classmethod
def tearDownClass(cls):
"""Run after all tests"""
def execSQLCommand(self, sql):
self.assertTrue(self.con)
cur = self.con.cursor()
self.assertTrue(cur)
cur.execute(sql)
cur.close()
self.con.commit()
def getSource(self):
# create temporary table for edit tests
self.execSQLCommand('DROP TABLE IF EXISTS qgis_test."editData" CASCADE')
self.execSQLCommand('CREATE TABLE qgis_test."editData" ( pk SERIAL NOT NULL PRIMARY KEY, cnt integer, name text, name2 text, num_char text, geom public.geometry(Point, 4326))')
self.execSQLCommand("INSERT INTO qgis_test.\"editData\" (pk, cnt, name, name2, num_char, geom) VALUES "
"(5, -200, NULL, 'NuLl', '5', '0101000020E61000001D5A643BDFC751C01F85EB51B88E5340'),"
"(3, 300, 'Pear', 'PEaR', '3', NULL),"
"(1, 100, 'Orange', 'oranGe', '1', '0101000020E61000006891ED7C3F9551C085EB51B81E955040'),"
"(2, 200, 'Apple', 'Apple', '2', '0101000020E6100000CDCCCCCCCC0C51C03333333333B35140'),"
"(4, 400, 'Honey', 'Honey', '4', '0101000020E610000014AE47E17A5450C03333333333935340')")
vl = QgsVectorLayer(
self.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POINT table="qgis_test"."editData" (geom) sql=',
'test', 'postgres')
return vl
def getEditableLayer(self):
return self.getSource()
def enableCompiler(self):
QgsSettings().setValue('/qgis/compileExpressions', True)
return True
def disableCompiler(self):
QgsSettings().setValue('/qgis/compileExpressions', False)
def uncompiledFilters(self):
return set([])
def partiallyCompiledFilters(self):
return set([])
# HERE GO THE PROVIDER SPECIFIC TESTS
def testDefaultValue(self):
self.source.setProviderProperty(QgsDataProvider.EvaluateDefaultValues, True)
self.assertIsInstance(self.source.defaultValue(0), int)
self.assertEqual(self.source.defaultValue(1), NULL)
self.assertEqual(self.source.defaultValue(2), 'qgis')
self.source.setProviderProperty(QgsDataProvider.EvaluateDefaultValues, False)
def testDefaultValueClause(self):
self.source.setProviderProperty(QgsDataProvider.EvaluateDefaultValues, False)
self.assertEqual(self.source.defaultValueClause(0), 'nextval(\'qgis_test."someData_pk_seq"\'::regclass)')
self.assertFalse(self.source.defaultValueClause(1))
self.assertEqual(self.source.defaultValueClause(2), '\'qgis\'::text')
def testDateTimeTypes(self):
vl = QgsVectorLayer('%s table="qgis_test"."date_times" sql=' % (self.dbconn), "testdatetimes", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName('date_field')).type(), QVariant.Date)
self.assertEqual(fields.at(fields.indexFromName('time_field')).type(), QVariant.Time)
self.assertEqual(fields.at(fields.indexFromName('datetime_field')).type(), QVariant.DateTime)
f = next(vl.getFeatures(QgsFeatureRequest()))
date_idx = vl.fields().lookupField('date_field')
self.assertIsInstance(f.attributes()[date_idx], QDate)
self.assertEqual(f.attributes()[date_idx], QDate(2004, 3, 4))
time_idx = vl.fields().lookupField('time_field')
self.assertIsInstance(f.attributes()[time_idx], QTime)
self.assertEqual(f.attributes()[time_idx], QTime(13, 41, 52))
datetime_idx = vl.fields().lookupField('datetime_field')
self.assertIsInstance(f.attributes()[datetime_idx], QDateTime)
self.assertEqual(f.attributes()[datetime_idx], QDateTime(QDate(2004, 3, 4), QTime(13, 41, 52)))
def testBooleanType(self):
vl = QgsVectorLayer('{} table="qgis_test"."boolean_table" sql='.format(self.dbconn), "testbool", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName('fld1')).type(), QVariant.Bool)
values = {feat['id']: feat['fld1'] for feat in vl.getFeatures()}
expected = {
1: True,
2: False,
3: NULL
}
self.assertEqual(values, expected)
def testQueryLayers(self):
def test_query(dbconn, query, key):
ql = QgsVectorLayer('%s srid=4326 table="%s" (geom) key=\'%s\' sql=' % (dbconn, query.replace('"', '\\"'), key), "testgeom", "postgres")
self.assertTrue(ql.isValid(), '{} ({})'.format(query, key))
test_query(self.dbconn, '(SELECT NULL::integer "Id1", NULL::integer "Id2", NULL::geometry(Point, 4326) geom LIMIT 0)', '"Id1","Id2"')
def testWkbTypes(self):
def test_table(dbconn, table_name, wkt):
vl = QgsVectorLayer('%s srid=4326 table="qgis_test".%s (geom) sql=' % (dbconn, table_name), "testgeom", "postgres")
self.assertTrue(vl.isValid())
for f in vl.getFeatures():
self.assertEqual(f.geometry().asWkt(), wkt)
test_table(self.dbconn, 'p2d', 'Polygon ((0 0, 1 0, 1 1, 0 1, 0 0))')
test_table(self.dbconn, 'p3d', 'PolygonZ ((0 0 0, 1 0 0, 1 1 0, 0 1 0, 0 0 0))')
test_table(self.dbconn, 'triangle2d', 'Polygon ((0 0, 1 0, 1 1, 0 0))')
test_table(self.dbconn, 'triangle3d', 'PolygonZ ((0 0 0, 1 0 0, 1 1 0, 0 0 0))')
test_table(self.dbconn, 'tin2d', 'MultiPolygon (((0 0, 1 0, 1 1, 0 0)),((0 0, 0 1, 1 1, 0 0)))')
test_table(self.dbconn, 'tin3d', 'MultiPolygonZ (((0 0 0, 1 0 0, 1 1 0, 0 0 0)),((0 0 0, 0 1 0, 1 1 0, 0 0 0)))')
test_table(self.dbconn, 'ps2d', 'MultiPolygon (((0 0, 1 0, 1 1, 0 1, 0 0)))')
test_table(self.dbconn, 'ps3d', 'MultiPolygonZ (((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)),((0 0 1, 1 0 1, 1 1 1, 0 1 1, 0 0 1)),((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)),((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),((1 0 0, 1 0 1, 0 0 1, 0 0 0, 1 0 0)))')
test_table(self.dbconn, 'mp3d', 'MultiPolygonZ (((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)),((0 0 1, 1 0 1, 1 1 1, 0 1 1, 0 0 1)),((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)),((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),((1 0 0, 1 0 1, 0 0 1, 0 0 0, 1 0 0)))')
test_table(self.dbconn, 'pt2d', 'Point (0 0)')
test_table(self.dbconn, 'pt3d', 'PointZ (0 0 0)')
test_table(self.dbconn, 'ls2d', 'LineString (0 0, 1 1)')
test_table(self.dbconn, 'ls3d', 'LineStringZ (0 0 0, 1 1 1)')
test_table(self.dbconn, 'mpt2d', 'MultiPoint ((0 0),(1 1))')
test_table(self.dbconn, 'mpt3d', 'MultiPointZ ((0 0 0),(1 1 1))')
test_table(self.dbconn, 'mls2d', 'MultiLineString ((0 0, 1 1),(2 2, 3 3))')
test_table(self.dbconn, 'mls3d', 'MultiLineStringZ ((0 0 0, 1 1 1),(2 2 2, 3 3 3))')
test_table(self.dbconn, 'pt4d', 'PointZM (1 2 3 4)')
def testMetadata(self):
""" Test that metadata is correctly acquired from provider """
metadata = self.vl.metadata()
self.assertEqual(metadata.crs(), QgsCoordinateReferenceSystem.fromEpsgId(4326))
self.assertEqual(metadata.type(), 'dataset')
self.assertEqual(metadata.abstract(), 'QGIS Test Table')
def testGetFeaturesUniqueId(self):
"""
Test tables with inheritance for unique ids
"""
def test_unique(features, num_features):
featureids = []
for f in features:
self.assertFalse(f.id() in featureids)
featureids.append(f.id())
self.assertEqual(len(features), num_features)
vl = QgsVectorLayer('%s srid=4326 table="qgis_test".%s (geom) sql=' % (self.dbconn, 'someData'), "testgeom", "postgres")
self.assertTrue(vl.isValid())
# Test someData
test_unique([f for f in vl.getFeatures()], 5)
# Test base_table_bad: layer is invalid
vl = QgsVectorLayer('%s srid=4326 table="qgis_test".%s (geom) sql=' % (self.dbconn, 'base_table_bad'), "testgeom", "postgres")
self.assertFalse(vl.isValid())
# Test base_table_bad with use estimated metadata: layer is valid because the unique test is skipped
vl = QgsVectorLayer('%s srid=4326 estimatedmetadata="true" table="qgis_test".%s (geom) sql=' % (self.dbconn, 'base_table_bad'), "testgeom", "postgres")
self.assertTrue(vl.isValid())
# Test base_table_good: layer is valid
vl = QgsVectorLayer('%s srid=4326 table="qgis_test".%s (geom) sql=' % (self.dbconn, 'base_table_good'), "testgeom", "postgres")
self.assertTrue(vl.isValid())
test_unique([f for f in vl.getFeatures()], 4)
# Test base_table_good with use estimated metadata: layer is valid
vl = QgsVectorLayer('%s srid=4326 estimatedmetadata="true" table="qgis_test".%s (geom) sql=' % (self.dbconn, 'base_table_good'), "testgeom", "postgres")
self.assertTrue(vl.isValid())
test_unique([f for f in vl.getFeatures()], 4)
# See https://issues.qgis.org/issues/14262
# TODO: accept multi-featured layers, and an array of values/fids
def testSignedIdentifiers(self):
def test_layer(ql, att, val, fidval):
self.assertTrue(ql.isValid())
features = ql.getFeatures()
att_idx = ql.fields().lookupField(att)
count = 0
for f in features:
count += 1
self.assertEqual(f.attributes()[att_idx], val)
self.assertEqual(f.id(), fidval)
self.assertEqual(count, 1)
def test(dbconn, query, att, val, fidval):
table = query.replace('"', '\\"')
uri = '%s table="%s" (g) key=\'%s\'' % (dbconn, table, att)
ql = QgsVectorLayer(uri, "t", "postgres")
test_layer(ql, att, val, fidval)
# now with estimated metadata
uri += ' estimatedmetadata="true"'
test_layer(ql, att, val, fidval)
# --- INT16 ----
# zero
test(self.dbconn, '(SELECT 0::int2 i, NULL::geometry(Point) g)', 'i', 0, 0)
# low positive
test(self.dbconn, '(SELECT 1::int2 i, NULL::geometry(Point) g)', 'i', 1, 1)
# low negative
test(self.dbconn, '(SELECT -1::int2 i, NULL::geometry(Point) g)', 'i', -1, 4294967295)
# max positive signed 16bit integer
test(self.dbconn, '(SELECT 32767::int2 i, NULL::geometry(Point) g)', 'i', 32767, 32767)
# max negative signed 16bit integer
test(self.dbconn, '(SELECT (-32768)::int2 i, NULL::geometry(Point) g)', 'i', -32768, 4294934528)
# --- INT32 ----
# zero
test(self.dbconn, '(SELECT 0::int4 i, NULL::geometry(Point) g)', 'i', 0, 0)
# low positive
test(self.dbconn, '(SELECT 2::int4 i, NULL::geometry(Point) g)', 'i', 2, 2)
# low negative
test(self.dbconn, '(SELECT -2::int4 i, NULL::geometry(Point) g)', 'i', -2, 4294967294)
# max positive signed 32bit integer
test(self.dbconn, '(SELECT 2147483647::int4 i, NULL::geometry(Point) g)', 'i', 2147483647, 2147483647)
# max negative signed 32bit integer
test(self.dbconn, '(SELECT (-2147483648)::int4 i, NULL::geometry(Point) g)', 'i', -2147483648, 2147483648)
# --- INT64 (FIDs are always 1 because assigned ex-novo) ----
# zero
test(self.dbconn, '(SELECT 0::int8 i, NULL::geometry(Point) g)', 'i', 0, 1)
# low positive
test(self.dbconn, '(SELECT 3::int8 i, NULL::geometry(Point) g)', 'i', 3, 1)
# low negative
test(self.dbconn, '(SELECT -3::int8 i, NULL::geometry(Point) g)', 'i', -3, 1)
# max positive signed 64bit integer
test(self.dbconn, '(SELECT 9223372036854775807::int8 i, NULL::geometry(Point) g)', 'i', 9223372036854775807, 1)
# max negative signed 32bit integer
test(self.dbconn, '(SELECT (-9223372036854775808)::int8 i, NULL::geometry(Point) g)', 'i', -9223372036854775808, 1)
def testPktIntInsert(self):
vl = QgsVectorLayer('{} table="qgis_test"."{}" key="pk" sql='.format(self.dbconn, 'bikes_view'), "bikes_view", "postgres")
self.assertTrue(vl.isValid())
f = QgsFeature(vl.fields())
f['pk'] = NULL
f['name'] = 'Cilo'
r, f = vl.dataProvider().addFeatures([f])
self.assertTrue(r)
self.assertNotEqual(f[0]['pk'], NULL, f[0].attributes())
vl.deleteFeatures([f[0].id()])
def testPktMapInsert(self):
vl = QgsVectorLayer('{} table="qgis_test"."{}" key="obj_id" sql='.format(self.dbconn, 'oid_serial_table'), "oid_serial", "postgres")
self.assertTrue(vl.isValid())
f = QgsFeature(vl.fields())
f['obj_id'] = vl.dataProvider().defaultValueClause(0)
f['name'] = 'Test'
r, f = vl.dataProvider().addFeatures([f])
self.assertTrue(r)
self.assertNotEqual(f[0]['obj_id'], NULL, f[0].attributes())
vl.deleteFeatures([f[0].id()])
def testNull(self):
"""
Asserts that 0, '' and NULL are treated as different values on insert
"""
vl = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'gid\' table="qgis_test"."constraints" sql=', 'test1', 'postgres')
self.assertTrue(vl.isValid())
QgsProject.instance().addMapLayer(vl)
tg = QgsTransactionGroup()
tg.addLayer(vl)
vl.startEditing()
def onError(message):
"""We should not get here. If we do, fail and say why"""
self.assertFalse(True, message)
vl.raiseError.connect(onError)
f = QgsFeature(vl.fields())
f['gid'] = 100
f['val'] = 0
f['name'] = ''
self.assertTrue(vl.addFeature(f))
feature = next(vl.getFeatures('"gid" = 100'))
self.assertEqual(f['val'], feature['val'])
self.assertEqual(f['name'], feature['name'])
def testNestedInsert(self):
tg = QgsTransactionGroup()
tg.addLayer(self.vl)
self.vl.startEditing()
it = self.vl.getFeatures()
f = next(it)
f['pk'] = NULL
self.vl.addFeature(f) # Should not deadlock during an active iteration
f = next(it)
def testTimeout(self):
"""
Asserts that we will not deadlock if more iterators are opened in parallel than
available in the connection pool
"""
request = QgsFeatureRequest()
request.setTimeout(1)
iterators = list()
for i in range(100):
iterators.append(self.vl.getFeatures(request))
def testTransactionDirtyName(self):
# create a vector ayer based on postgres
vl = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POLYGON table="qgis_test"."some_poly_data" (geom) sql=', 'test', 'postgres')
self.assertTrue(vl.isValid())
# prepare a project with transactions enabled
p = QgsProject()
p.setAutoTransaction(True)
p.addMapLayers([vl])
vl.startEditing()
# update the data within the transaction
tr = vl.dataProvider().transaction()
sql = "update qgis_test.some_poly_data set pk=1 where pk=1"
name = "My Awesome Transaction!"
self.assertTrue(tr.executeSql(sql, True, name)[0])
# test name
self.assertEqual(vl.undoStack().command(0).text(), name)
# rollback
vl.rollBack()
def testTransactionDirty(self):
# create a vector layer based on postgres
vl = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POLYGON table="qgis_test"."some_poly_data" (geom) sql=', 'test', 'postgres')
self.assertTrue(vl.isValid())
# prepare a project with transactions enabled
p = QgsProject()
p.setAutoTransaction(True)
p.addMapLayers([vl])
vl.startEditing()
# check that the feature used for testing is ok
ft0 = vl.getFeatures('pk=1')
f = QgsFeature()
self.assertTrue(ft0.nextFeature(f))
# update the data within the transaction
tr = vl.dataProvider().transaction()
sql = "update qgis_test.some_poly_data set pk=33 where pk=1"
self.assertTrue(tr.executeSql(sql, True)[0])
# check that the pk of the feature has been changed
ft = vl.getFeatures('pk=1')
self.assertFalse(ft.nextFeature(f))
ft = vl.getFeatures('pk=33')
self.assertTrue(ft.nextFeature(f))
# underlying data has been modified but the layer is not tagged as
# modified
self.assertTrue(vl.isModified())
# undo sql query
vl.undoStack().undo()
# check that the original feature with pk is back
ft0 = vl.getFeatures('pk=1')
self.assertTrue(ft0.nextFeature(f))
# redo
vl.undoStack().redo()
# check that the pk of the feature has been changed
ft1 = vl.getFeatures('pk=1')
self.assertFalse(ft1.nextFeature(f))
def testTransactionConstrains(self):
# create a vector layer based on postgres
vl = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'id\' table="qgis_test"."check_constraints" sql=', 'test', 'postgres')
self.assertTrue(vl.isValid())
# prepare a project with transactions enabled
p = QgsProject()
p.setAutoTransaction(True)
p.addMapLayers([vl])
# get feature
f = QgsFeature()
self.assertTrue(vl.getFeatures('id=1').nextFeature(f))
self.assertEqual(f.attributes(), [1, 4, 3])
# start edition
vl.startEditing()
# update attribute form with a failing constraints
# coming from the database if attributes are updated
# one at a time.
# Current feature: a = 4 / b = 3
# Update feature: a = 1 / b = 0
# If updated one at a time, '(a = 1) < (b = 3)' => FAIL!
form = QgsAttributeForm(vl, f)
for w in form.findChildren(QLabel):
if w.buddy():
spinBox = w.buddy()
if w.text() == 'a':
spinBox.setValue(1)
elif w.text() == 'b':
spinBox.setValue(0)
# save
form.save()
# check new values
self.assertTrue(vl.getFeatures('id=1').nextFeature(f))
self.assertEqual(f.attributes(), [1, 1, 0])
def testTransactionTuple(self):
# create a vector layer based on postgres
vl = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POLYGON table="qgis_test"."some_poly_data" (geom) sql=', 'test', 'postgres')
self.assertTrue(vl.isValid())
# prepare a project with transactions enabled
p = QgsProject()
p.setAutoTransaction(True)
p.addMapLayers([vl])
vl.startEditing()
# execute a query which returns a tuple
tr = vl.dataProvider().transaction()
sql = "select * from qgis_test.some_poly_data"
self.assertTrue(tr.executeSql(sql, False)[0])
# underlying data has not been modified
self.assertFalse(vl.isModified())
def testDomainTypes(self):
"""Test that domain types are correctly mapped"""
vl = QgsVectorLayer('%s table="qgis_test"."domains" sql=' % (self.dbconn), "domains", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
expected = {}
expected['fld_var_char_domain'] = {'type': QVariant.String, 'typeName': 'qgis_test.var_char_domain', 'length': -1}
expected['fld_var_char_domain_6'] = {'type': QVariant.String, 'typeName': 'qgis_test.var_char_domain_6', 'length': 6}
expected['fld_character_domain'] = {'type': QVariant.String, 'typeName': 'qgis_test.character_domain', 'length': 1}
expected['fld_character_domain_6'] = {'type': QVariant.String, 'typeName': 'qgis_test.character_domain_6', 'length': 6}
expected['fld_char_domain'] = {'type': QVariant.String, 'typeName': 'qgis_test.char_domain', 'length': 1}
expected['fld_char_domain_6'] = {'type': QVariant.String, 'typeName': 'qgis_test.char_domain_6', 'length': 6}
expected['fld_text_domain'] = {'type': QVariant.String, 'typeName': 'qgis_test.text_domain', 'length': -1}
expected['fld_numeric_domain'] = {'type': QVariant.Double, 'typeName': 'qgis_test.numeric_domain', 'length': 10, 'precision': 4}
for f, e in list(expected.items()):
self.assertEqual(fields.at(fields.indexFromName(f)).type(), e['type'])
self.assertEqual(fields.at(fields.indexFromName(f)).typeName(), e['typeName'])
self.assertEqual(fields.at(fields.indexFromName(f)).length(), e['length'])
if 'precision' in e:
self.assertEqual(fields.at(fields.indexFromName(f)).precision(), e['precision'])
def testRenameAttributes(self):
''' Test renameAttributes() '''
vl = QgsVectorLayer('%s table="qgis_test"."rename_table" sql=' % (self.dbconn), "renames", "postgres")
provider = vl.dataProvider()
provider.renameAttributes({1: 'field1', 2: 'field2'})
# bad rename
self.assertFalse(provider.renameAttributes({-1: 'not_a_field'}))
self.assertFalse(provider.renameAttributes({100: 'not_a_field'}))
# already exists
self.assertFalse(provider.renameAttributes({1: 'field2'}))
# rename one field
self.assertTrue(provider.renameAttributes({1: 'newname'}))
self.assertEqual(provider.fields().at(1).name(), 'newname')
vl.updateFields()
fet = next(vl.getFeatures())
self.assertEqual(fet.fields()[1].name(), 'newname')
# rename two fields
self.assertTrue(provider.renameAttributes({1: 'newname2', 2: 'another'}))
self.assertEqual(provider.fields().at(1).name(), 'newname2')
self.assertEqual(provider.fields().at(2).name(), 'another')
vl.updateFields()
fet = next(vl.getFeatures())
self.assertEqual(fet.fields()[1].name(), 'newname2')
self.assertEqual(fet.fields()[2].name(), 'another')
# close layer and reopen, then recheck to confirm that changes were saved to db
del vl
vl = None
vl = QgsVectorLayer('%s table="qgis_test"."rename_table" sql=' % (self.dbconn), "renames", "postgres")
provider = vl.dataProvider()
self.assertEqual(provider.fields().at(1).name(), 'newname2')
self.assertEqual(provider.fields().at(2).name(), 'another')
fet = next(vl.getFeatures())
self.assertEqual(fet.fields()[1].name(), 'newname2')
self.assertEqual(fet.fields()[2].name(), 'another')
def testEditorWidgetTypes(self):
"""Test that editor widget types can be fetched from the qgis_editor_widget_styles table"""
vl = QgsVectorLayer('%s table="qgis_test"."widget_styles" sql=' % (self.dbconn), "widget_styles", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
setup1 = fields.field("fld1").editorWidgetSetup()
self.assertFalse(setup1.isNull())
self.assertEqual(setup1.type(), "FooEdit")
self.assertEqual(setup1.config(), {"param1": "value1", "param2": "2"})
best1 = QgsGui.editorWidgetRegistry().findBest(vl, "fld1")
self.assertEqual(best1.type(), "FooEdit")
self.assertEqual(best1.config(), setup1.config())
self.assertTrue(fields.field("fld2").editorWidgetSetup().isNull())
best2 = QgsGui.editorWidgetRegistry().findBest(vl, "fld2")
self.assertEqual(best2.type(), "TextEdit")
def testHstore(self):
vl = QgsVectorLayer('%s table="qgis_test"."dict" sql=' % (self.dbconn), "testhstore", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName('value')).type(), QVariant.Map)
f = next(vl.getFeatures(QgsFeatureRequest()))
value_idx = vl.fields().lookupField('value')
self.assertIsInstance(f.attributes()[value_idx], dict)
self.assertEqual(f.attributes()[value_idx], {'a': 'b', '1': '2'})
new_f = QgsFeature(vl.fields())
new_f['pk'] = NULL
new_f['value'] = {'simple': '1', 'doubleQuote': '"y"', 'quote': "'q'", 'backslash': '\\'}
r, fs = vl.dataProvider().addFeatures([new_f])
self.assertTrue(r)
new_pk = fs[0]['pk']
self.assertNotEqual(new_pk, NULL, fs[0].attributes())
try:
read_back = vl.getFeature(new_pk)
self.assertEqual(read_back['pk'], new_pk)
self.assertEqual(read_back['value'], new_f['value'])
finally:
self.assertTrue(vl.startEditing())
self.assertTrue(vl.deleteFeatures([new_pk]))
self.assertTrue(vl.commitChanges())
def testStringArray(self):
vl = QgsVectorLayer('%s table="qgis_test"."string_array" sql=' % (self.dbconn), "teststringarray", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName('value')).type(), QVariant.StringList)
self.assertEqual(fields.at(fields.indexFromName('value')).subType(), QVariant.String)
f = next(vl.getFeatures(QgsFeatureRequest()))
value_idx = vl.fields().lookupField('value')
self.assertIsInstance(f.attributes()[value_idx], list)
self.assertEqual(f.attributes()[value_idx], ['a', 'b', 'c'])
new_f = QgsFeature(vl.fields())
new_f['pk'] = NULL
new_f['value'] = ['simple', '"doubleQuote"', "'quote'", 'back\\slash']
r, fs = vl.dataProvider().addFeatures([new_f])
self.assertTrue(r)
new_pk = fs[0]['pk']
self.assertNotEqual(new_pk, NULL, fs[0].attributes())
try:
read_back = vl.getFeature(new_pk)
self.assertEqual(read_back['pk'], new_pk)
self.assertEqual(read_back['value'], new_f['value'])
finally:
self.assertTrue(vl.startEditing())
self.assertTrue(vl.deleteFeatures([new_pk]))
self.assertTrue(vl.commitChanges())
def testIntArray(self):
vl = QgsVectorLayer('%s table="qgis_test"."int_array" sql=' % (self.dbconn), "testintarray", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName('value')).type(), QVariant.List)
self.assertEqual(fields.at(fields.indexFromName('value')).subType(), QVariant.Int)
f = next(vl.getFeatures(QgsFeatureRequest()))
value_idx = vl.fields().lookupField('value')
self.assertIsInstance(f.attributes()[value_idx], list)
self.assertEqual(f.attributes()[value_idx], [1, 2, -5])
def testDoubleArray(self):
vl = QgsVectorLayer('%s table="qgis_test"."double_array" sql=' % (self.dbconn), "testdoublearray", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName('value')).type(), QVariant.List)
self.assertEqual(fields.at(fields.indexFromName('value')).subType(), QVariant.Double)
f = next(vl.getFeatures(QgsFeatureRequest()))
value_idx = vl.fields().lookupField('value')
self.assertIsInstance(f.attributes()[value_idx], list)
self.assertEqual(f.attributes()[value_idx], [1.1, 2, -5.12345])
def testNotNullConstraint(self):
vl = QgsVectorLayer('%s table="qgis_test"."constraints" sql=' % (self.dbconn), "constraints", "postgres")
self.assertTrue(vl.isValid())
self.assertEqual(len(vl.fields()), 4)
# test some bad field indexes
self.assertEqual(vl.dataProvider().fieldConstraints(-1), QgsFieldConstraints.Constraints())
self.assertEqual(vl.dataProvider().fieldConstraints(1001), QgsFieldConstraints.Constraints())
self.assertTrue(vl.dataProvider().fieldConstraints(0) & QgsFieldConstraints.ConstraintNotNull)
self.assertFalse(vl.dataProvider().fieldConstraints(1) & QgsFieldConstraints.ConstraintNotNull)
self.assertTrue(vl.dataProvider().fieldConstraints(2) & QgsFieldConstraints.ConstraintNotNull)
self.assertFalse(vl.dataProvider().fieldConstraints(3) & QgsFieldConstraints.ConstraintNotNull)
# test that constraints have been saved to fields correctly
fields = vl.fields()
self.assertTrue(fields.at(0).constraints().constraints() & QgsFieldConstraints.ConstraintNotNull)
self.assertEqual(fields.at(0).constraints().constraintOrigin(QgsFieldConstraints.ConstraintNotNull), QgsFieldConstraints.ConstraintOriginProvider)
self.assertFalse(fields.at(1).constraints().constraints() & QgsFieldConstraints.ConstraintNotNull)
self.assertTrue(fields.at(2).constraints().constraints() & QgsFieldConstraints.ConstraintNotNull)
self.assertEqual(fields.at(2).constraints().constraintOrigin(QgsFieldConstraints.ConstraintNotNull), QgsFieldConstraints.ConstraintOriginProvider)
self.assertFalse(fields.at(3).constraints().constraints() & QgsFieldConstraints.ConstraintNotNull)
def testUniqueConstraint(self):
vl = QgsVectorLayer('%s table="qgis_test"."constraints" sql=' % (self.dbconn), "constraints", "postgres")
self.assertTrue(vl.isValid())
self.assertEqual(len(vl.fields()), 4)
# test some bad field indexes
self.assertEqual(vl.dataProvider().fieldConstraints(-1), QgsFieldConstraints.Constraints())
self.assertEqual(vl.dataProvider().fieldConstraints(1001), QgsFieldConstraints.Constraints())
self.assertTrue(vl.dataProvider().fieldConstraints(0) & QgsFieldConstraints.ConstraintUnique)
self.assertTrue(vl.dataProvider().fieldConstraints(1) & QgsFieldConstraints.ConstraintUnique)
self.assertTrue(vl.dataProvider().fieldConstraints(2) & QgsFieldConstraints.ConstraintUnique)
self.assertFalse(vl.dataProvider().fieldConstraints(3) & QgsFieldConstraints.ConstraintUnique)
# test that constraints have been saved to fields correctly
fields = vl.fields()
self.assertTrue(fields.at(0).constraints().constraints() & QgsFieldConstraints.ConstraintUnique)
self.assertEqual(fields.at(0).constraints().constraintOrigin(QgsFieldConstraints.ConstraintUnique), QgsFieldConstraints.ConstraintOriginProvider)
self.assertTrue(fields.at(1).constraints().constraints() & QgsFieldConstraints.ConstraintUnique)
self.assertEqual(fields.at(1).constraints().constraintOrigin(QgsFieldConstraints.ConstraintUnique), QgsFieldConstraints.ConstraintOriginProvider)
self.assertTrue(fields.at(2).constraints().constraints() & QgsFieldConstraints.ConstraintUnique)
self.assertEqual(fields.at(2).constraints().constraintOrigin(QgsFieldConstraints.ConstraintUnique), QgsFieldConstraints.ConstraintOriginProvider)
self.assertFalse(fields.at(3).constraints().constraints() & QgsFieldConstraints.ConstraintUnique)
def testConstraintOverwrite(self):
""" test that Postgres provider constraints can't be overwritten by vector layer method """
vl = QgsVectorLayer('%s table="qgis_test"."constraints" sql=' % (self.dbconn), "constraints", "postgres")
self.assertTrue(vl.isValid())
self.assertTrue(vl.dataProvider().fieldConstraints(0) & QgsFieldConstraints.ConstraintNotNull)
self.assertTrue(vl.fields().at(0).constraints().constraints() & QgsFieldConstraints.ConstraintNotNull)
# add a constraint at the layer level
vl.setFieldConstraint(0, QgsFieldConstraints.ConstraintUnique)
# should be no change at provider level
self.assertTrue(vl.dataProvider().fieldConstraints(0) & QgsFieldConstraints.ConstraintNotNull)
# but layer should still keep provider constraints...
self.assertTrue(vl.fields().at(0).constraints().constraints() & QgsFieldConstraints.ConstraintNotNull)
self.assertTrue(vl.fieldConstraints(0) & QgsFieldConstraints.ConstraintNotNull)
# ...in addition to layer level constraint
self.assertTrue(vl.fields().at(0).constraints().constraints() & QgsFieldConstraints.ConstraintUnique)
self.assertTrue(vl.fieldConstraints(0) & QgsFieldConstraints.ConstraintUnique)
def testVectorLayerUtilsUniqueWithProviderDefault(self):
vl = QgsVectorLayer('%s table="qgis_test"."someData" sql=' % (self.dbconn), "someData", "postgres")
default_clause = 'nextval(\'qgis_test."someData_pk_seq"\'::regclass)'
vl.dataProvider().setProviderProperty(QgsDataProvider.EvaluateDefaultValues, False)
self.assertEqual(vl.dataProvider().defaultValueClause(0), default_clause)
self.assertTrue(QgsVectorLayerUtils.valueExists(vl, 0, 4))
vl.startEditing()
f = QgsFeature(vl.fields())
f.setAttribute(0, default_clause)
self.assertFalse(QgsVectorLayerUtils.valueExists(vl, 0, default_clause))
self.assertTrue(vl.addFeatures([f]))
# the default value clause should exist...
self.assertTrue(QgsVectorLayerUtils.valueExists(vl, 0, default_clause))
# but it should not prevent the attribute being validated
self.assertTrue(QgsVectorLayerUtils.validateAttribute(vl, f, 0))
vl.rollBack()
def testSkipConstraintCheck(self):
vl = QgsVectorLayer('%s table="qgis_test"."someData" sql=' % (self.dbconn), "someData", "postgres")
default_clause = 'nextval(\'qgis_test."someData_pk_seq"\'::regclass)'
vl.dataProvider().setProviderProperty(QgsDataProvider.EvaluateDefaultValues, False)
self.assertTrue(vl.dataProvider().skipConstraintCheck(0, QgsFieldConstraints.ConstraintUnique, default_clause))
self.assertFalse(vl.dataProvider().skipConstraintCheck(0, QgsFieldConstraints.ConstraintUnique, 59))
def testVectorLayerUtilsCreateFeatureWithProviderDefault(self):
vl = QgsVectorLayer('%s table="qgis_test"."someData" sql=' % (self.dbconn), "someData", "postgres")
default_clause = 'nextval(\'qgis_test."someData_pk_seq"\'::regclass)'
self.assertEqual(vl.dataProvider().defaultValueClause(0), default_clause)
# check that provider default clause takes precedence over passed attribute values
# this also checks that the inbuilt unique constraint handling is bypassed in the case of a provider default clause
f = QgsVectorLayerUtils.createFeature(vl, attributes={1: 5, 3: 'map'})
self.assertEqual(f.attributes(), [default_clause, 5, "'qgis'::text", "'qgis'::text", None, None])
# test take vector layer default value expression overrides postgres provider default clause
vl.setDefaultValueDefinition(3, QgsDefaultValue("'mappy'"))
f = QgsVectorLayerUtils.createFeature(vl, attributes={1: 5, 3: 'map'})
self.assertEqual(f.attributes(), [default_clause, 5, "'qgis'::text", 'mappy', None, None])
# See https://issues.qgis.org/issues/15188
def testNumericPrecision(self):
uri = 'point?field=f1:int'
uri += '&field=f2:double(6,4)'
uri += '&field=f3:string(20)'
lyr = QgsVectorLayer(uri, "x", "memory")
self.assertTrue(lyr.isValid())
f = QgsFeature(lyr.fields())
f['f1'] = 1
f['f2'] = 123.456
f['f3'] = '12345678.90123456789'
lyr.dataProvider().addFeatures([f])
uri = '%s table="qgis_test"."b18155" (g) key=\'f1\'' % (self.dbconn)
self.execSQLCommand('DROP TABLE IF EXISTS qgis_test.b18155')
err = QgsVectorLayerExporter.exportLayer(lyr, uri, "postgres", lyr.crs())
self.assertEqual(err[0], QgsVectorLayerExporter.NoError,
'unexpected import error {0}'.format(err))
lyr = QgsVectorLayer(uri, "y", "postgres")
self.assertTrue(lyr.isValid())
f = next(lyr.getFeatures())
self.assertEqual(f['f1'], 1)
self.assertEqual(f['f2'], 123.456)
self.assertEqual(f['f3'], '12345678.90123456789')
# See https://issues.qgis.org/issues/15226
def testImportKey(self):
uri = 'point?field=f1:int'
uri += '&field=F2:double(6,4)'
uri += '&field=f3:string(20)'
lyr = QgsVectorLayer(uri, "x", "memory")
self.assertTrue(lyr.isValid())
def testKey(lyr, key, kfnames):
self.execSQLCommand('DROP TABLE IF EXISTS qgis_test.import_test')
uri = '%s table="qgis_test"."import_test" (g)' % self.dbconn
if key is not None:
uri += ' key=\'%s\'' % key
err = QgsVectorLayerExporter.exportLayer(lyr, uri, "postgres", lyr.crs())
self.assertEqual(err[0], QgsVectorLayerExporter.NoError,
'unexpected import error {0}'.format(err))
olyr = QgsVectorLayer(uri, "y", "postgres")
self.assertTrue(olyr.isValid())
flds = lyr.fields()
oflds = olyr.fields()
if key is None:
# if the pkey was not given, it will create a pkey
self.assertEqual(oflds.size(), flds.size() + 1)
self.assertEqual(oflds[0].name(), kfnames[0])
for i in range(flds.size()):
self.assertEqual(oflds[i + 1].name(), flds[i].name())
else:
# pkey was given, no extra field generated
self.assertEqual(oflds.size(), flds.size())
for i in range(oflds.size()):
self.assertEqual(oflds[i].name(), flds[i].name())
pks = olyr.primaryKeyAttributes()
self.assertEqual(len(pks), len(kfnames))
for i in range(0, len(kfnames)):
self.assertEqual(oflds[pks[i]].name(), kfnames[i])
testKey(lyr, 'f1', ['f1'])
testKey(lyr, '"f1"', ['f1'])
testKey(lyr, '"f1","F2"', ['f1', 'F2'])
testKey(lyr, '"f1","F2","f3"', ['f1', 'F2', 'f3'])
testKey(lyr, None, ['id'])
# See https://issues.qgis.org/issues/17518
def testImportWithoutSchema(self):
def _test(table, schema=None):
self.execSQLCommand('DROP TABLE IF EXISTS %s CASCADE' % table)
uri = 'point?field=f1:int'
uri += '&field=F2:double(6,4)'
uri += '&field=f3:string(20)'
lyr = QgsVectorLayer(uri, "x", "memory")
self.assertTrue(lyr.isValid())
table = ("%s" % table) if schema is None else ("\"%s\".\"%s\"" % (schema, table))
dest_uri = "%s sslmode=disable table=%s (geom) sql" % (self.dbconn, table)
QgsVectorLayerExporter.exportLayer(lyr, dest_uri, "postgres", lyr.crs())
olyr = QgsVectorLayer(dest_uri, "y", "postgres")
self.assertTrue(olyr.isValid(), "Failed URI: %s" % dest_uri)
# Test bug 17518
_test('b17518')
# Test fully qualified table (with schema)
_test("b17518", "qgis_test")
# Test empty schema
_test("b17518", "")
# Test public schema
_test("b17518", "public")
# Test fully qualified table (with wrong schema)
with self.assertRaises(AssertionError):
_test("b17518", "qgis_test_wrong")
def testStyle(self):
self.execSQLCommand('DROP TABLE IF EXISTS layer_styles CASCADE')
vl = self.getEditableLayer()
self.assertTrue(vl.isValid())
self.assertTrue(vl.dataProvider().isSaveAndLoadStyleToDatabaseSupported())
self.assertTrue(vl.dataProvider().isDeleteStyleFromDatabaseSupported())
# table layer_styles does not exit
related_count, idlist, namelist, desclist, errmsg = vl.listStylesInDatabase()
self.assertEqual(related_count, -1)
self.assertEqual(idlist, [])
self.assertEqual(namelist, [])
self.assertEqual(desclist, [])
self.assertNotEqual(errmsg, "")
qml, errmsg = vl.getStyleFromDatabase("1")
self.assertEqual(qml, "")
self.assertNotEqual(errmsg, "")
mFilePath = QDir.toNativeSeparators('%s/symbol_layer/%s.qml' % (unitTestDataPath(), "singleSymbol"))
status = vl.loadNamedStyle(mFilePath)
self.assertTrue(status)
# The style is saved as non-default
errorMsg = vl.saveStyleToDatabase("by day", "faded greens and elegant patterns", False, "")
self.assertEqual(errorMsg, "")
# the style id should be "1", not "by day"
qml, errmsg = vl.getStyleFromDatabase("by day")
self.assertEqual(qml, "")
self.assertNotEqual(errmsg, "")
related_count, idlist, namelist, desclist, errmsg = vl.listStylesInDatabase()
self.assertEqual(related_count, 1)
self.assertEqual(errmsg, "")
self.assertEqual(idlist, ["1"])
self.assertEqual(namelist, ["by day"])
self.assertEqual(desclist, ["faded greens and elegant patterns"])
qml, errmsg = vl.getStyleFromDatabase("100")
self.assertEqual(qml, "")
self.assertNotEqual(errmsg, "")
qml, errmsg = vl.getStyleFromDatabase("1")
self.assertTrue(qml.startswith('<!DOCTYPE qgis'), qml)
self.assertEqual(errmsg, "")
res, errmsg = vl.deleteStyleFromDatabase("100")
self.assertTrue(res)
self.assertEqual(errmsg, "")
res, errmsg = vl.deleteStyleFromDatabase("1")
self.assertTrue(res)
self.assertEqual(errmsg, "")
# We save now the style again twice but with one as default
errorMsg = vl.saveStyleToDatabase("related style", "faded greens and elegant patterns", False, "")
self.assertEqual(errorMsg, "")
errorMsg = vl.saveStyleToDatabase("default style", "faded greens and elegant patterns", True, "")
self.assertEqual(errorMsg, "")
related_count, idlist, namelist, desclist, errmsg = vl.listStylesInDatabase()
self.assertEqual(related_count, 2)
self.assertEqual(errmsg, "")
self.assertEqual(idlist, ["3", "2"]) # Ids must be reversed.
self.assertEqual(namelist, ["default style", "related style"])
self.assertEqual(desclist, ["faded greens and elegant patterns"] * 2)
# We remove these 2 styles
res, errmsg = vl.deleteStyleFromDatabase("2")
self.assertTrue(res)
self.assertEqual(errmsg, "")
res, errmsg = vl.deleteStyleFromDatabase("3")
self.assertTrue(res)
self.assertEqual(errmsg, "")
# table layer_styles does exit, but is now empty
related_count, idlist, namelist, desclist, errmsg = vl.listStylesInDatabase()
self.assertEqual(related_count, 0)
self.assertEqual(idlist, [])
self.assertEqual(namelist, [])
self.assertEqual(desclist, [])
self.assertEqual(errmsg, "")
def testHasMetadata(self):
# views don't have metadata
vl = QgsVectorLayer('{} table="qgis_test"."{}" key="pk" sql='.format(self.dbconn, 'bikes_view'), "bikes_view", "postgres")
self.assertTrue(vl.isValid())
self.assertFalse(vl.dataProvider().hasMetadata())
# ordinary tables have metadata
vl = QgsVectorLayer('%s table="qgis_test"."someData" sql=' % (self.dbconn), "someData", "postgres")
self.assertTrue(vl.isValid())
self.assertTrue(vl.dataProvider().hasMetadata())
def testReadExtentOnView(self):
# vector layer based on view
vl0 = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POLYGON table="qgis_test"."some_poly_data_view" (geom) sql=', 'test', 'postgres')
self.assertTrue(vl0.isValid())
self.assertFalse(vl0.dataProvider().hasMetadata())
# set a custom extent
originalExtent = vl0.extent()
customExtent = QgsRectangle(-80, 80, -70, 90)
vl0.setExtent(customExtent)
# write xml
doc = QDomDocument("testdoc")
elem = doc.createElement("maplayer")
self.assertTrue(vl0.writeLayerXml(elem, doc, QgsReadWriteContext()))
# read xml with the custom extent. It should not be used by default
vl1 = QgsVectorLayer()
vl1.readLayerXml(elem, QgsReadWriteContext())