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
|
import sqlalchemy as sa
from sqlalchemy_utils import get_referencing_foreign_keys
from tests import TestCase
class TestGetReferencingFksWithCompositeKeys(TestCase):
def create_models(self):
class User(self.Base):
__tablename__ = 'user'
first_name = sa.Column(sa.Unicode(255), primary_key=True)
last_name = sa.Column(sa.Unicode(255), primary_key=True)
class Article(self.Base):
__tablename__ = 'article'
id = sa.Column(sa.Integer, primary_key=True)
author_first_name = sa.Column(sa.Unicode(255))
author_last_name = sa.Column(sa.Unicode(255))
__table_args__ = (
sa.ForeignKeyConstraint(
[author_first_name, author_last_name],
[User.first_name, User.last_name]
),
)
self.User = User
self.Article = Article
def test_with_declarative_class(self):
fks = get_referencing_foreign_keys(self.User)
assert self.Article.__table__.foreign_keys == fks
def test_with_table(self):
fks = get_referencing_foreign_keys(self.User.__table__)
assert self.Article.__table__.foreign_keys == fks
class TestGetReferencingFksWithInheritance(TestCase):
def create_models(self):
class User(self.Base):
__tablename__ = 'user'
id = sa.Column(sa.Integer, primary_key=True)
type = sa.Column(sa.Unicode)
first_name = sa.Column(sa.Unicode(255))
last_name = sa.Column(sa.Unicode(255))
__mapper_args__ = {
'polymorphic_on': 'type'
}
class Admin(User):
__tablename__ = 'admin'
id = sa.Column(
sa.Integer, sa.ForeignKey(User.id), primary_key=True
)
class TextItem(self.Base):
__tablename__ = 'textitem'
id = sa.Column(sa.Integer, primary_key=True)
type = sa.Column(sa.Unicode)
author_id = sa.Column(sa.Integer, sa.ForeignKey(User.id))
__mapper_args__ = {
'polymorphic_on': 'type'
}
class Article(TextItem):
__tablename__ = 'article'
id = sa.Column(
sa.Integer, sa.ForeignKey(TextItem.id), primary_key=True
)
__mapper_args__ = {
'polymorphic_identity': 'article'
}
self.Admin = Admin
self.User = User
self.Article = Article
self.TextItem = TextItem
def test_with_declarative_class(self):
fks = get_referencing_foreign_keys(self.Admin)
assert self.TextItem.__table__.foreign_keys == fks
def test_with_table(self):
fks = get_referencing_foreign_keys(self.Admin.__table__)
assert fks == set([])
|
