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
|
from sqlalchemy import Integer, String, ForeignKey, func, desc, and_, or_
from sqlalchemy.orm import interfaces, relationship, mapper, \
clear_mappers, create_session, joinedload, joinedload_all, \
subqueryload, subqueryload_all, polymorphic_union, aliased,\
class_mapper
from sqlalchemy import exc as sa_exc
from sqlalchemy.engine import default
from sqlalchemy.testing import AssertsCompiledSQL, fixtures
from sqlalchemy import testing
from sqlalchemy.testing.schema import Table, Column
from sqlalchemy.testing import assert_raises, eq_
class Company(fixtures.ComparableEntity):
pass
class Person(fixtures.ComparableEntity):
pass
class Engineer(Person):
pass
class Manager(Person):
pass
class Boss(Manager):
pass
class Machine(fixtures.ComparableEntity):
pass
class MachineType(fixtures.ComparableEntity):
pass
class Paperwork(fixtures.ComparableEntity):
pass
class _PolymorphicFixtureBase(fixtures.MappedTest, AssertsCompiledSQL):
run_inserts = 'once'
run_setup_mappers = 'once'
run_deletes = None
@classmethod
def define_tables(cls, metadata):
global people, engineers, managers, boss
global companies, paperwork, machines
companies = Table('companies', metadata,
Column('company_id', Integer,
primary_key=True,
test_needs_autoincrement=True),
Column('name', String(50)))
people = Table('people', metadata,
Column('person_id', Integer,
primary_key=True,
test_needs_autoincrement=True),
Column('company_id', Integer,
ForeignKey('companies.company_id')),
Column('name', String(50)),
Column('type', String(30)))
engineers = Table('engineers', metadata,
Column('person_id', Integer,
ForeignKey('people.person_id'),
primary_key=True),
Column('status', String(30)),
Column('engineer_name', String(50)),
Column('primary_language', String(50)))
machines = Table('machines', metadata,
Column('machine_id',
Integer, primary_key=True,
test_needs_autoincrement=True),
Column('name', String(50)),
Column('engineer_id', Integer,
ForeignKey('engineers.person_id')))
managers = Table('managers', metadata,
Column('person_id', Integer,
ForeignKey('people.person_id'),
primary_key=True),
Column('status', String(30)),
Column('manager_name', String(50)))
boss = Table('boss', metadata,
Column('boss_id', Integer,
ForeignKey('managers.person_id'),
primary_key=True),
Column('golf_swing', String(30)))
paperwork = Table('paperwork', metadata,
Column('paperwork_id', Integer,
primary_key=True,
test_needs_autoincrement=True),
Column('description', String(50)),
Column('person_id', Integer,
ForeignKey('people.person_id')))
@classmethod
def insert_data(cls):
cls.e1 = e1 = Engineer(
name="dilbert",
engineer_name="dilbert",
primary_language="java",
status="regular engineer",
paperwork=[
Paperwork(description="tps report #1"),
Paperwork(description="tps report #2")],
machines=[
Machine(name='IBM ThinkPad'),
Machine(name='IPhone')])
cls.e2 = e2 = Engineer(
name="wally",
engineer_name="wally",
primary_language="c++",
status="regular engineer",
paperwork=[
Paperwork(description="tps report #3"),
Paperwork(description="tps report #4")],
machines=[Machine(name="Commodore 64")])
cls.b1 = b1 = Boss(
name="pointy haired boss",
golf_swing="fore",
manager_name="pointy",
status="da boss",
paperwork=[Paperwork(description="review #1")])
cls.m1 = m1 = Manager(
name="dogbert",
manager_name="dogbert",
status="regular manager",
paperwork=[
Paperwork(description="review #2"),
Paperwork(description="review #3")])
cls.e3 = e3 = Engineer(
name="vlad",
engineer_name="vlad",
primary_language="cobol",
status="elbonian engineer",
paperwork=[
Paperwork(description='elbonian missive #3')],
machines=[
Machine(name="Commodore 64"),
Machine(name="IBM 3270")])
cls.c1 = c1 = Company(name="MegaCorp, Inc.")
c1.employees = [e1, e2, b1, m1]
cls.c2 = c2 = Company(name="Elbonia, Inc.")
c2.employees = [e3]
sess = create_session()
sess.add(c1)
sess.add(c2)
sess.flush()
sess.expunge_all()
cls.all_employees = [e1, e2, b1, m1, e3]
cls.c1_employees = [e1, e2, b1, m1]
cls.c2_employees = [e3]
def _company_with_emps_machines_fixture(self):
fixture = self._company_with_emps_fixture()
fixture[0].employees[0].machines = [
Machine(name="IBM ThinkPad"),
Machine(name="IPhone"),
]
fixture[0].employees[1].machines = [
Machine(name="Commodore 64")
]
return fixture
def _company_with_emps_fixture(self):
return [
Company(
name="MegaCorp, Inc.",
employees=[
Engineer(
name="dilbert",
engineer_name="dilbert",
primary_language="java",
status="regular engineer"
),
Engineer(
name="wally",
engineer_name="wally",
primary_language="c++",
status="regular engineer"),
Boss(
name="pointy haired boss",
golf_swing="fore",
manager_name="pointy",
status="da boss"),
Manager(
name="dogbert",
manager_name="dogbert",
status="regular manager"),
]),
Company(
name="Elbonia, Inc.",
employees=[
Engineer(
name="vlad",
engineer_name="vlad",
primary_language="cobol",
status="elbonian engineer")
])
]
def _emps_wo_relationships_fixture(self):
return [
Engineer(
name="dilbert",
engineer_name="dilbert",
primary_language="java",
status="regular engineer"),
Engineer(
name="wally",
engineer_name="wally",
primary_language="c++",
status="regular engineer"),
Boss(
name="pointy haired boss",
golf_swing="fore",
manager_name="pointy",
status="da boss"),
Manager(
name="dogbert",
manager_name="dogbert",
status="regular manager"),
Engineer(
name="vlad",
engineer_name="vlad",
primary_language="cobol",
status="elbonian engineer")
]
@classmethod
def setup_mappers(cls):
mapper(Company, companies,
properties={
'employees':relationship(
Person,
order_by=people.c.person_id)})
mapper(Machine, machines)
person_with_polymorphic,\
manager_with_polymorphic = cls._get_polymorphics()
mapper(Person, people,
with_polymorphic=person_with_polymorphic,
polymorphic_on=people.c.type,
polymorphic_identity='person',
order_by=people.c.person_id,
properties={
'paperwork':relationship(
Paperwork,
order_by=paperwork.c.paperwork_id)})
mapper(Engineer, engineers,
inherits=Person,
polymorphic_identity='engineer',
properties={
'machines':relationship(
Machine,
order_by=machines.c.machine_id)})
mapper(Manager, managers,
with_polymorphic=manager_with_polymorphic,
inherits=Person,
polymorphic_identity='manager')
mapper(Boss, boss,
inherits=Manager,
polymorphic_identity='boss')
mapper(Paperwork, paperwork)
class _Polymorphic(_PolymorphicFixtureBase):
select_type = ""
@classmethod
def _get_polymorphics(cls):
return None, None
class _PolymorphicPolymorphic(_PolymorphicFixtureBase):
select_type = "Polymorphic"
@classmethod
def _get_polymorphics(cls):
return '*', '*'
class _PolymorphicUnions(_PolymorphicFixtureBase):
select_type = "Unions"
@classmethod
def _get_polymorphics(cls):
people, engineers, managers, boss = \
cls.tables.people, cls.tables.engineers, \
cls.tables.managers, cls.tables.boss
person_join = polymorphic_union({
'engineer':people.join(engineers),
'manager':people.join(managers)},
None, 'pjoin')
manager_join = people.join(managers).outerjoin(boss)
person_with_polymorphic = (
[Person, Manager, Engineer], person_join)
manager_with_polymorphic = ('*', manager_join)
return person_with_polymorphic,\
manager_with_polymorphic
class _PolymorphicAliasedJoins(_PolymorphicFixtureBase):
select_type = "AliasedJoins"
@classmethod
def _get_polymorphics(cls):
people, engineers, managers, boss = \
cls.tables.people, cls.tables.engineers, \
cls.tables.managers, cls.tables.boss
person_join = people \
.outerjoin(engineers) \
.outerjoin(managers) \
.select(use_labels=True) \
.alias('pjoin')
manager_join = people \
.join(managers) \
.outerjoin(boss) \
.select(use_labels=True) \
.alias('mjoin')
person_with_polymorphic = (
[Person, Manager, Engineer], person_join)
manager_with_polymorphic = ('*', manager_join)
return person_with_polymorphic,\
manager_with_polymorphic
class _PolymorphicJoins(_PolymorphicFixtureBase):
select_type = "Joins"
@classmethod
def _get_polymorphics(cls):
people, engineers, managers, boss = \
cls.tables.people, cls.tables.engineers, \
cls.tables.managers, cls.tables.boss
person_join = people.outerjoin(engineers).outerjoin(managers)
manager_join = people.join(managers).outerjoin(boss)
person_with_polymorphic = (
[Person, Manager, Engineer], person_join)
manager_with_polymorphic = ('*', manager_join)
return person_with_polymorphic,\
manager_with_polymorphic
|
