/
test_provider_postgres.py
2405 lines (2043 loc) · 101 KB
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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'
import qgis # NOQA
import psycopg2
import os
import time
from datetime import datetime
from qgis.core import (
QgsVectorLayer,
QgsVectorLayerExporter,
QgsFeatureRequest,
QgsFeature,
QgsFieldConstraints,
QgsDataProvider,
NULL,
QgsVectorLayerUtils,
QgsSettings,
QgsTransactionGroup,
QgsReadWriteContext,
QgsRectangle,
QgsDefaultValue,
QgsCoordinateReferenceSystem,
QgsProject,
QgsWkbTypes,
QgsGeometry,
QgsProviderRegistry,
QgsVectorDataProvider,
QgsDataSourceUri,
)
from qgis.gui import QgsGui, QgsAttributeForm
from qgis.PyQt.QtCore import QDate, QTime, QDateTime, QVariant, QDir, QObject, QByteArray
from qgis.PyQt.QtWidgets import QLabel
from qgis.testing import start_app, unittest
from qgis.PyQt.QtXml import QDomDocument
from utilities import unitTestDataPath, compareWkt
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 = 'service=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, dt timestamp without time zone, "date" date, "time" time without time zone, geom public.geometry(Point, 4326))')
self.execSQLCommand("INSERT INTO qgis_test.\"editData\" (pk, cnt, name, name2, num_char, dt, \"date\", \"time\", geom) VALUES "
"(5, -200, NULL, 'NuLl', '5', TIMESTAMP '2020-05-04 12:13:14', '2020-05-02', '12:13:01', '0101000020E61000001D5A643BDFC751C01F85EB51B88E5340'),"
"(3, 300, 'Pear', 'PEaR', '3', NULL, NULL, NULL, NULL),"
"(1, 100, 'Orange', 'oranGe', '1', TIMESTAMP '2020-05-03 12:13:14', '2020-05-03', '12:13:14', '0101000020E61000006891ED7C3F9551C085EB51B81E955040'),"
"(2, 200, 'Apple', 'Apple', '2', TIMESTAMP '2020-05-04 12:14:14', '2020-05-04', '12:14:14', '0101000020E6100000CDCCCCCCCC0C51C03333333333B35140'),"
"(4, 400, 'Honey', 'Honey', '4', TIMESTAMP '2021-05-04 13:13:14', '2021-05-04', '13:13:14', '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 getEditableLayerWithCheckConstraint(self):
"""Returns the layer for attribute change CHECK constraint violation"""
return QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'id\' srid=4326 type=POINT table="public"."test_check_constraint" (geom) sql=', 'test_check_constraint', 'postgres')
def enableCompiler(self):
QgsSettings().setValue('/qgis/compileExpressions', True)
return True
def disableCompiler(self):
QgsSettings().setValue('/qgis/compileExpressions', False)
def uncompiledFilters(self):
return set(['"dt" = to_datetime(\'000www14ww13ww12www4ww5ww2020\',\'zzzwwwsswwmmwwhhwwwdwwMwwyyyy\')',
'"date" = to_date(\'www4ww5ww2020\',\'wwwdwwMwwyyyy\')',
'"time" = to_time(\'000www14ww13ww12www\',\'zzzwwwsswwmmwwhhwww\')'])
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 testByteaType(self):
vl = QgsVectorLayer('{} table="qgis_test"."byte_a_table" sql='.format(
self.dbconn), "testbytea", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(fields.at(fields.indexFromName(
'fld1')).type(), QVariant.ByteArray)
values = {feat['id']: feat['fld1'] for feat in vl.getFeatures()}
expected = {
1: QByteArray(b'YmludmFsdWU='),
2: QByteArray()
}
self.assertEqual(values, expected)
# editing binary values
self.execSQLCommand(
'DROP TABLE IF EXISTS qgis_test."byte_a_table_edit" CASCADE')
self.execSQLCommand(
'CREATE TABLE qgis_test."byte_a_table_edit" ( pk SERIAL NOT NULL PRIMARY KEY, blobby bytea)')
self.execSQLCommand("INSERT INTO qgis_test.\"byte_a_table_edit\" (pk, blobby) VALUES "
"(1, encode('bbb', 'base64')::bytea)")
vl = QgsVectorLayer(
self.dbconn + ' sslmode=disable table="qgis_test"."byte_a_table_edit" sql=',
'test', 'postgres')
self.assertTrue(vl.isValid())
values = {feat['pk']: feat['blobby'] for feat in vl.getFeatures()}
expected = {
1: QByteArray(b'YmJi')
}
self.assertEqual(values, expected)
# change attribute value
self.assertTrue(vl.dataProvider().changeAttributeValues(
{1: {1: QByteArray(b'bbbvx')}}))
values = {feat['pk']: feat['blobby'] for feat in vl.getFeatures()}
expected = {
1: QByteArray(b'bbbvx')
}
self.assertEqual(values, expected)
# add feature
f = QgsFeature()
f.setAttributes([2, QByteArray(b'cccc')])
self.assertTrue(vl.dataProvider().addFeature(f))
values = {feat['pk']: feat['blobby'] for feat in vl.getFeatures()}
expected = {
1: QByteArray(b'bbbvx'),
2: QByteArray(b'cccc')
}
self.assertEqual(values, expected)
# change feature
self.assertTrue(vl.dataProvider().changeFeatures(
{2: {1: QByteArray(b'dddd')}}, {}))
values = {feat['pk']: feat['blobby'] for feat in vl.getFeatures()}
expected = {
1: QByteArray(b'bbbvx'),
2: QByteArray(b'dddd')
}
self.assertEqual(values, expected)
def testCitextType(self):
vl = QgsVectorLayer('{} table="qgis_test"."citext_table" sql='.format(
self.dbconn), "testbytea", "postgres")
self.assertTrue(vl.isValid())
fields = vl.dataProvider().fields()
self.assertEqual(
fields.at(fields.indexFromName('fld1')).type(), QVariant.String)
values = {feat['id']: feat['fld1'] for feat in vl.getFeatures()}
expected = {
1: 'test val',
2: NULL
}
self.assertEqual(values, expected)
# editing citext values
self.execSQLCommand(
'DROP TABLE IF EXISTS qgis_test."citext_table_edit" CASCADE')
self.execSQLCommand(
'CREATE TABLE qgis_test."citext_table_edit" ( pk SERIAL NOT NULL PRIMARY KEY, txt citext)')
self.execSQLCommand("INSERT INTO qgis_test.\"citext_table_edit\" (pk, txt) VALUES "
"(1, 'text')")
vl = QgsVectorLayer(
self.dbconn + ' sslmode=disable table="qgis_test"."citext_table_edit" sql=',
'test', 'postgres')
self.assertTrue(vl.isValid())
values = {feat['pk']: feat['txt'] for feat in vl.getFeatures()}
expected = {
1: 'text'
}
self.assertEqual(values, expected)
# change attribute value
self.assertTrue(
vl.dataProvider().changeAttributeValues({1: {1: 'teeeext'}}))
values = {feat['pk']: feat['txt'] for feat in vl.getFeatures()}
expected = {
1: 'teeeext'
}
self.assertEqual(values, expected)
# add feature
f = QgsFeature()
f.setAttributes([2, 'teeeeeeeeeext'])
self.assertTrue(vl.dataProvider().addFeature(f))
values = {feat['pk']: feat['txt'] for feat in vl.getFeatures()}
expected = {
1: 'teeeext',
2: 'teeeeeeeeeext'
}
self.assertEqual(values, expected)
# change feature
self.assertTrue(vl.dataProvider().changeFeatures(
{2: {1: 'teeeeeeeeeeeeeeeeeeeeeeext'}}, {}))
values = {feat['pk']: feat['txt'] for feat in vl.getFeatures()}
expected = {
1: 'teeeext',
2: 'teeeeeeeeeeeeeeeeeeeeeeext'
}
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://github.com/qgis/QGIS/issues/22258
# 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 testNonPkBigintField(self):
"""Test if we can correctly insert, read and change attributes(fields) of type bigint and which are not PKs."""
vl = QgsVectorLayer(
'{} sslmode=disable srid=4326 key="pk" table="qgis_test".{} (geom)'.format(
self.dbconn, 'bigint_pk'),
"bigint_pk", "postgres")
self.assertTrue(vl.isValid())
flds = vl.fields()
# check if default values are correctly read back
f = next(vl.getFeatures(QgsFeatureRequest()))
bigint_with_default_idx = vl.fields().lookupField('bigint_attribute_def')
self.assertEqual(f.attributes()[bigint_with_default_idx], 42)
# check if NULL values are correctly read
bigint_def_null_idx = vl.fields().lookupField('bigint_attribute')
self.assertEqual(f.attributes()[bigint_def_null_idx], NULL)
# check if we can overwrite a default value
vl.startEditing()
vl.changeAttributeValue(f.id(), bigint_with_default_idx, 43)
pkidx = vl.fields().lookupField('pk')
editedid = f.attributes()[pkidx]
self.assertTrue(vl.commitChanges())
vl2 = QgsVectorLayer(
'{} sslmode=disable srid=4326 key="pk" table="qgis_test".{} (geom)'.format(
self.dbconn, 'bigint_pk'),
"bigint_pk", "postgres")
flds = vl2.fields()
self.assertTrue(vl2.isValid())
f = next(vl2.getFeatures(
QgsFeatureRequest().setFilterExpression('pk = ' + str(editedid))))
bigint_with_default_idx = vl2.fields().lookupField('bigint_attribute_def')
self.assertEqual(f.attributes()[bigint_with_default_idx], 43)
# check if we can insert a new value
dp = vl2.dataProvider()
dp.setProviderProperty(QgsDataProvider.EvaluateDefaultValues, 1)
pkidx = vl2.fields().lookupField('pk')
vl2.startEditing()
f = QgsFeature(vl2.fields())
f['pk'] = NULL
f['value'] = 'The answer.'
f['bigint_attribute'] = 84
f.setAttribute(pkidx, vl2.dataProvider().defaultValue(pkidx))
f.setAttribute(bigint_with_default_idx,
vl2.dataProvider().defaultValue(bigint_with_default_idx))
r, f = vl2.dataProvider().addFeatures([f])
self.assertTrue(r)
vl2.commitChanges()
inserted_id = f[0]['pk']
f = next(vl2.getFeatures(
QgsFeatureRequest().setFilterExpression('pk = ' + str(inserted_id))))
self.assertEqual(f['bigint_attribute'], 84)
self.assertEqual(f['bigint_attribute_def'], 42)
def testPktUpdateBigintPk(self):
"""Test if we can update objects with positive, zero and negative bigint PKs."""
vl = QgsVectorLayer(
'{} sslmode=disable srid=4326 key="pk" table="qgis_test".{} (geom)'.format(
self.dbconn, 'bigint_pk'),
"bigint_pk", "postgres")
flds = vl.fields()
self.assertTrue(vl.isValid())
vl.startEditing()
statuses = [-1, -1, -1, -1]
# changing values...
for ft in vl.getFeatures():
if ft['value'] == 'first value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '1st value')
statuses[0] = 0
elif ft['value'] == 'second value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '2nd value')
statuses[1] = 0
elif ft['value'] == 'zero value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '0th value')
statuses[2] = 0
elif ft['value'] == 'negative value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '-1th value')
statuses[3] = 0
self.assertTrue(vl.commitChanges())
self.assertTrue(all(x == 0 for x in statuses))
# now, let's see if the values were changed
vl2 = QgsVectorLayer(
'{} sslmode=disable srid=4326 key="pk" table="qgis_test".{} (geom)'.format(
self.dbconn, 'bigint_pk'),
"bigint_pk", "postgres")
self.assertTrue(vl2.isValid())
for ft in vl2.getFeatures():
if ft['value'] == '1st value':
statuses[0] = 1
elif ft['value'] == '2nd value':
statuses[1] = 1
elif ft['value'] == '0th value':
statuses[2] = 1
elif ft['value'] == '-1th value':
statuses[3] = 1
self.assertTrue(all(x == 1 for x in statuses))
def testPktUpdateBigintPkNonFirst(self):
"""Test if we can update objects with positive, zero and negative bigint PKs in tables whose PK is not the first field"""
vl = QgsVectorLayer('{} sslmode=disable srid=4326 key="pk" table="qgis_test".{} (geom)'.format(self.dbconn,
'bigint_non_first_pk'),
"bigint_non_first_pk", "postgres")
flds = vl.fields()
self.assertTrue(vl.isValid())
vl.startEditing()
statuses = [-1, -1, -1, -1]
# changing values...
for ft in vl.getFeatures():
if ft['value'] == 'first value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '1st value')
statuses[0] = 0
elif ft['value'] == 'second value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '2nd value')
statuses[1] = 0
elif ft['value'] == 'zero value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '0th value')
statuses[2] = 0
elif ft['value'] == 'negative value':
vl.changeAttributeValue(
ft.id(), flds.indexOf('value'), '-1th value')
statuses[3] = 0
self.assertTrue(vl.commitChanges())
self.assertTrue(all(x == 0 for x in statuses))
# now, let's see if the values were changed
vl2 = QgsVectorLayer(
'{} sslmode=disable srid=4326 key="pk" table="qgis_test".{} (geom)'.format(
self.dbconn, 'bigint_pk'),
"bigint_pk_nonfirst", "postgres")
self.assertTrue(vl2.isValid())
for ft in vl2.getFeatures():
if ft['value'] == '1st value':
statuses[0] = 1
elif ft['value'] == '2nd value':
statuses[1] = 1
elif ft['value'] == '0th value':
statuses[2] = 1
elif ft['value'] == '-1th value':
statuses[3] = 1
self.assertTrue(all(x == 1 for x in statuses))
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 testTransactionConstraints(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())