1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
|
"""Evaluating SQL expressions on ORM objects"""
from sqlalchemy import and_
from sqlalchemy import bindparam
from sqlalchemy import ForeignKey
from sqlalchemy import inspect
from sqlalchemy import Integer
from sqlalchemy import JSON
from sqlalchemy import not_
from sqlalchemy import or_
from sqlalchemy import String
from sqlalchemy import testing
from sqlalchemy import tuple_
from sqlalchemy.orm import evaluator
from sqlalchemy.orm import exc as orm_exc
from sqlalchemy.orm import relationship
from sqlalchemy.testing import assert_raises
from sqlalchemy.testing import assert_raises_message
from sqlalchemy.testing import eq_
from sqlalchemy.testing import expect_raises_message
from sqlalchemy.testing import expect_warnings
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import is_
from sqlalchemy.testing.fixtures import fixture_session
from sqlalchemy.testing.schema import Column
from sqlalchemy.testing.schema import Table
compiler = evaluator.EvaluatorCompiler()
def eval_eq(clause, testcases=None):
evaluator = compiler.process(clause)
def testeval(obj=None, expected_result=None):
assert evaluator(obj) == expected_result, "%s != %r for %s with %r" % (
evaluator(obj),
expected_result,
clause,
obj,
)
if testcases:
for an_obj, result in testcases:
testeval(an_obj, result)
return testeval
class EvaluateTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table(
"users",
metadata,
Column("id", Integer, primary_key=True),
Column("name", String(64)),
Column("othername", String(64)),
Column("json", JSON),
)
@classmethod
def setup_classes(cls):
class User(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
users, User = cls.tables.users, cls.classes.User
cls.mapper_registry.map_imperatively(User, users)
def test_compare_to_value(self):
User = self.classes.User
eval_eq(
User.name == "foo",
testcases=[
(User(name="foo"), True),
(User(name="bar"), False),
(User(name=None), None),
],
)
eval_eq(
User.id < 5,
testcases=[
(User(id=3), True),
(User(id=5), False),
(User(id=None), None),
],
)
def test_compare_to_callable_bind(self):
User = self.classes.User
eval_eq(
User.name == bindparam("x", callable_=lambda: "foo"),
testcases=[
(User(name="foo"), True),
(User(name="bar"), False),
(User(name=None), None),
],
)
def test_compare_to_none(self):
User = self.classes.User
eval_eq(
User.name == None, # noqa
testcases=[
(User(name="foo"), False),
(User(name=None), True),
(None, None),
],
)
def test_warn_on_unannotated_matched_column(self):
User = self.classes.User
compiler = evaluator.EvaluatorCompiler(User)
with expect_warnings(
r"Evaluating non-mapped column expression 'othername' "
"onto ORM instances; this is a deprecated use case."
):
meth = compiler.process(User.name == Column("othername", String))
u1 = User(id=5)
meth(u1)
def test_raise_on_unannotated_unmatched_column(self):
User = self.classes.User
compiler = evaluator.EvaluatorCompiler(User)
assert_raises_message(
evaluator.UnevaluatableError,
"Cannot evaluate column: foo",
compiler.process,
User.id == Column("foo", Integer),
)
# if we let the above method through as we did
# prior to [ticket:3366], we would get
# AttributeError: 'User' object has no attribute 'foo'
# u1 = User(id=5)
# meth(u1)
def test_true_false(self):
User = self.classes.User
eval_eq(
User.name == False, # noqa
testcases=[
(User(name="foo"), False),
(User(name=True), False),
(User(name=False), True),
(None, None),
],
)
eval_eq(
User.name == True, # noqa
testcases=[
(User(name="foo"), False),
(User(name=True), True),
(User(name=False), False),
(None, None),
],
)
def test_boolean_ops(self):
User = self.classes.User
eval_eq(
and_(User.name == "foo", User.id == 1),
testcases=[
(User(id=1, name="foo"), True),
(User(id=2, name="foo"), False),
(User(id=1, name="bar"), False),
(User(id=2, name="bar"), False),
(User(id=1, name=None), None),
(None, None),
],
)
eval_eq(
or_(User.name == "foo", User.id == 1),
testcases=[
(User(id=1, name="foo"), True),
(User(id=2, name="foo"), True),
(User(id=1, name="bar"), True),
(User(id=2, name="bar"), False),
(User(id=1, name=None), True),
(User(id=2, name=None), None),
(None, None),
],
)
eval_eq(
not_(User.id == 1),
testcases=[
(User(id=1), False),
(User(id=2), True),
(User(id=None), None),
],
)
@testing.combinations(
lambda User: User.name + "_foo" == "named_foo",
# not implemented in 1.4
# lambda User: User.name.startswith("nam"),
# lambda User: User.name.endswith("named"),
)
def test_string_ops(self, expr):
User = self.classes.User
test_expr = testing.resolve_lambda(expr, User=User)
eval_eq(
test_expr,
testcases=[
(User(name="named"), True),
(User(name="othername"), False),
],
)
def test_in(self):
User = self.classes.User
eval_eq(
User.name.in_(["foo", "bar"]),
testcases=[
(User(id=1, name="foo"), True),
(User(id=2, name="bat"), False),
(User(id=1, name="bar"), True),
(User(id=1, name=None), None),
(None, None),
],
)
eval_eq(
User.name.not_in(["foo", "bar"]),
testcases=[
(User(id=1, name="foo"), False),
(User(id=2, name="bat"), True),
(User(id=1, name="bar"), False),
(User(id=1, name=None), None),
(None, None),
],
)
def test_in_tuples(self):
User = self.classes.User
eval_eq(
tuple_(User.id, User.name).in_([(1, "foo"), (2, "bar")]),
testcases=[
(User(id=1, name="foo"), True),
(User(id=2, name="bat"), False),
(User(id=1, name="bar"), False),
(User(id=2, name="bar"), True),
(User(id=1, name=None), None),
(None, None),
],
)
eval_eq(
tuple_(User.id, User.name).not_in([(1, "foo"), (2, "bar")]),
testcases=[
(User(id=1, name="foo"), False),
(User(id=2, name="bat"), True),
(User(id=1, name="bar"), True),
(User(id=2, name="bar"), False),
(User(id=1, name=None), None),
(None, None),
],
)
def test_null_propagation(self):
User = self.classes.User
eval_eq(
(User.name == "foo") == (User.id == 1),
testcases=[
(User(id=1, name="foo"), True),
(User(id=2, name="foo"), False),
(User(id=1, name="bar"), False),
(User(id=2, name="bar"), True),
(User(id=None, name="foo"), None),
(User(id=None, name=None), None),
(None, None),
],
)
@testing.combinations(
(lambda User: User.id + 5, "id", 10, 15, None),
(
lambda User: User.name + " name",
"name",
"some value",
"some value name",
None,
),
(
lambda User: User.id + "name",
"id",
10,
evaluator.UnevaluatableError,
r"Cannot evaluate math operator \"add\" for "
r"datatypes INTEGER, VARCHAR",
),
(
lambda User: User.json + 12,
"json",
{"foo": "bar"},
evaluator.UnevaluatableError,
r"Cannot evaluate math operator \"add\" for "
r"datatypes JSON, INTEGER",
),
(
lambda User: User.json - 12,
"json",
{"foo": "bar"},
evaluator.UnevaluatableError,
r"Cannot evaluate math operator \"sub\" for "
r"datatypes JSON, INTEGER",
),
(
lambda User: User.json - "foo",
"json",
{"foo": "bar"},
evaluator.UnevaluatableError,
r"Cannot evaluate math operator \"sub\" for "
r"datatypes JSON, VARCHAR",
),
)
def test_math_op_type_exclusions(
self, expr, attrname, initial_value, expected, message
):
"""test #8507"""
User = self.classes.User
expr = testing.resolve_lambda(expr, User=User)
if expected is evaluator.UnevaluatableError:
with expect_raises_message(evaluator.UnevaluatableError, message):
compiler.process(expr)
else:
obj = User(**{attrname: initial_value})
new_value = compiler.process(expr)(obj)
eq_(new_value, expected)
class M2OEvaluateTest(fixtures.DeclarativeMappedTest):
@classmethod
def setup_classes(cls):
Base = cls.DeclarativeBasic
class Parent(Base):
__tablename__ = "parent"
id = Column(Integer, primary_key=True)
class Child(Base):
__tablename__ = "child"
_id_parent = Column(
"id_parent", Integer, ForeignKey(Parent.id), primary_key=True
)
name = Column(String(50), primary_key=True)
parent = relationship(Parent)
def test_delete_not_expired(self):
Parent, Child = self.classes("Parent", "Child")
session = fixture_session(expire_on_commit=False)
p = Parent(id=1)
session.add(p)
session.commit()
c = Child(name="foo", parent=p)
session.add(c)
session.commit()
session.query(Child).filter(Child.parent == p).delete("evaluate")
is_(inspect(c).deleted, True)
def test_delete_expired(self):
Parent, Child = self.classes("Parent", "Child")
session = fixture_session()
p = Parent(id=1)
session.add(p)
session.commit()
c = Child(name="foo", parent=p)
session.add(c)
session.commit()
session.query(Child).filter(Child.parent == p).delete("evaluate")
# because it's expired
is_(inspect(c).deleted, False)
# but it's gone
assert_raises(orm_exc.ObjectDeletedError, lambda: c.name)
|
