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Parameters substitution for SELECT queries
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| from datetime import date, datetime | ||
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| from enum import Enum | ||
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| from .compat import text_type, string_types | ||
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| escape_chars_map = { | ||
| "\b": "\\b", | ||
| "\f": "\\f", | ||
| "\r": "\\r", | ||
| "\n": "\\n", | ||
| "\t": "\\t", | ||
| "\0": "\\0", | ||
| "\a": "\\a", | ||
| "\v": "\\v", | ||
| "\\": "\\\\", | ||
| "'": "\\'" | ||
| } | ||
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| def escape_param(item): | ||
| if item is None: | ||
| return 'NULL' | ||
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| elif isinstance(item, datetime): | ||
| return "'%s'" % item.strftime('%Y-%m-%d %H:%M:%S') | ||
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| elif isinstance(item, date): | ||
| return "'%s'" % item.strftime('%Y-%m-%d') | ||
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| elif isinstance(item, string_types): | ||
| return "'%s'" % ''.join(escape_chars_map.get(c, c) for c in item) | ||
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| elif isinstance(item, (list, tuple)): | ||
| return "[%s]" % ', '.join(text_type(escape_param(x)) for x in item) | ||
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| elif isinstance(item, Enum): | ||
| return item.value | ||
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| else: | ||
| return item | ||
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| def escape_params(params): | ||
| escaped = {} | ||
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| for key, value in params.items(): | ||
| escaped[key] = escape_param(value) | ||
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| return escaped |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| # coding=utf-8 | ||
| from __future__ import unicode_literals | ||
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| from datetime import date, datetime | ||
| from decimal import Decimal | ||
| from enum import Enum | ||
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| from tests.testcase import BaseTestCase | ||
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| class ParametersSubstitutionTestCase(BaseTestCase): | ||
| single_tpl = 'SELECT %(x)s' | ||
| double_tpl = 'SELECT %(x)s, %(y)s' | ||
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| def assert_subst(self, tpl, params, sql): | ||
| self.assertEqual(self.client.substitute_params(tpl, params), sql) | ||
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| def test_int(self): | ||
| params = {'x': 123} | ||
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| self.assert_subst(self.single_tpl, params, 'SELECT 123') | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [(123, )]) | ||
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| def test_null(self): | ||
| params = {'x': None} | ||
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| self.assert_subst(self.single_tpl, params, 'SELECT NULL') | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [(None, )]) | ||
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| def test_date(self): | ||
| d = date(2017, 10, 16) | ||
| params = {'x': d} | ||
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| self.assert_subst(self.single_tpl, params, "SELECT '2017-10-16'") | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [('2017-10-16', )]) | ||
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| tpl = 'SELECT CAST(%(x)s AS Date)' | ||
| self.assert_subst(tpl, params, "SELECT CAST('2017-10-16' AS Date)") | ||
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| rv = self.client.execute(tpl, params) | ||
| self.assertEqual(rv, [(d, )]) | ||
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| def test_datetime(self): | ||
| dt = datetime(2017, 10, 16, 0, 18, 50) | ||
| params = {'x': dt} | ||
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| self.assert_subst(self.single_tpl, params, | ||
| "SELECT '2017-10-16 00:18:50'") | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [('2017-10-16 00:18:50', )]) | ||
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| tpl = 'SELECT CAST(%(x)s AS DateTime)' | ||
| self.assert_subst(tpl, params, | ||
| "SELECT CAST('2017-10-16 00:18:50' AS DateTime)") | ||
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| rv = self.client.execute(tpl, params) | ||
| self.assertEqual(rv, [(dt, )]) | ||
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| def test_string(self): | ||
| params = {'x': 'test\t\n\x16', 'y': 'тест\t\n\x16'} | ||
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| self.assert_subst(self.double_tpl, params, | ||
| "SELECT 'test\\t\\n\x16', 'тест\\t\\n\x16'") | ||
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| rv = self.client.execute(self.double_tpl, params) | ||
| self.assertEqual(rv, [('test\t\n\x16', 'тест\t\n\x16')]) | ||
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| params = {'x': "'"} | ||
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| self.assert_subst(self.single_tpl, params, "SELECT '\\''") | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [("'", )]) | ||
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| params = {'x': "\\"} | ||
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| self.assert_subst(self.single_tpl, params, "SELECT '\\\\'") | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [("\\", )]) | ||
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| def test_array(self): | ||
| params = {'x': [1, None, 2]} | ||
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| self.assert_subst(self.single_tpl, params, 'SELECT [1, NULL, 2]') | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [((1, None, 2), )]) | ||
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| params = {'x': [[1, 2, 3], [4, 5], [6, 7]]} | ||
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| self.assert_subst(self.single_tpl, params, | ||
| 'SELECT [[1, 2, 3], [4, 5], [6, 7]]') | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [(((1, 2, 3), (4, 5), (6, 7)), )]) | ||
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| def test_tuple(self): | ||
| params = {'x': (1, None, 2)} | ||
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| self.assert_subst(self.single_tpl, params, 'SELECT [1, NULL, 2]') | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [((1, None, 2), )]) | ||
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| params = {'x': ((1, 2, 3), (4, 5), (6, 7))} | ||
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| self.assert_subst(self.single_tpl, params, | ||
| 'SELECT [[1, 2, 3], [4, 5], [6, 7]]') | ||
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| rv = self.client.execute(self.single_tpl, params) | ||
| self.assertEqual(rv, [(((1, 2, 3), (4, 5), (6, 7)), )]) | ||
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| def test_enum(self): | ||
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| class A(Enum): | ||
| hello = -1 | ||
| world = 2 | ||
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| params = {'x': A.hello, 'y': A.world} | ||
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| self.assert_subst(self.double_tpl, params, 'SELECT -1, 2') | ||
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| rv = self.client.execute(self.double_tpl, params) | ||
| self.assertEqual(rv, [(-1, 2)]) | ||
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| def test_float(self): | ||
| params = {'x': 1e-12, 'y': 123.45} | ||
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| self.assert_subst(self.double_tpl, params, 'SELECT 1e-12, 123.45') | ||
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| rv = self.client.execute(self.double_tpl, params) | ||
| self.assertEqual(rv, [(params['x'], params['y'])]) | ||
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| def test_decimal(self): | ||
| params = {'x': Decimal('1e-2'), 'y': Decimal('123.45')} | ||
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| self.assert_subst(self.double_tpl, params, 'SELECT 0.01, 123.45') | ||
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| rv = self.client.execute(self.double_tpl, params) | ||
| self.assertEqual(rv, [(0.01, 123.45)]) |