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
|
import pytest
import sqlalchemy as sa
from sqlalchemy_utils import merge_references
class TestMergeReferences:
@pytest.fixture
def User(self, Base):
class User(Base):
__tablename__ = 'user'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
def __repr__(self):
return 'User(%r)' % self.name
return User
@pytest.fixture
def BlogPost(self, Base, User):
class BlogPost(Base):
__tablename__ = 'blog_post'
id = sa.Column(sa.Integer, primary_key=True)
title = sa.Column(sa.Unicode(255))
content = sa.Column(sa.UnicodeText)
author_id = sa.Column(sa.Integer, sa.ForeignKey('user.id'))
author = sa.orm.relationship(User)
return BlogPost
@pytest.fixture
def init_models(self, User, BlogPost):
pass
def test_updates_foreign_keys(self, session, User, BlogPost):
john = User(name='John')
jack = User(name='Jack')
post = BlogPost(title='Some title', author=john)
post2 = BlogPost(title='Other title', author=jack)
session.add(john)
session.add(jack)
session.add(post)
session.add(post2)
session.commit()
merge_references(john, jack)
session.commit()
assert post.author == jack
assert post2.author == jack
def test_object_merging_whenever_possible(self, session, User, BlogPost):
john = User(name='John')
jack = User(name='Jack')
post = BlogPost(title='Some title', author=john)
post2 = BlogPost(title='Other title', author=jack)
session.add(john)
session.add(jack)
session.add(post)
session.add(post2)
session.commit()
# Load the author for post
assert post.author_id == john.id
merge_references(john, jack)
session.commit()
assert post.author_id == jack.id
assert post2.author_id == jack.id
class TestMergeReferencesWithManyToManyAssociations:
@pytest.fixture
def User(self, Base):
class User(Base):
__tablename__ = 'user'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
def __repr__(self):
return 'User(%r)' % self.name
return User
@pytest.fixture
def Team(self, Base):
team_member = sa.Table(
'team_member', Base.metadata,
sa.Column(
'user_id', sa.Integer,
sa.ForeignKey('user.id', ondelete='CASCADE'),
primary_key=True
),
sa.Column(
'team_id', sa.Integer,
sa.ForeignKey('team.id', ondelete='CASCADE'),
primary_key=True
)
)
class Team(Base):
__tablename__ = 'team'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
members = sa.orm.relationship(
'User',
secondary=team_member,
backref='teams'
)
return Team
@pytest.fixture
def init_models(self, User, Team):
pass
def test_supports_associations(self, session, User, Team):
john = User(name='John')
jack = User(name='Jack')
team = Team(name='Team')
team.members.append(john)
session.add(john)
session.add(jack)
session.commit()
merge_references(john, jack)
assert john not in team.members
assert jack in team.members
class TestMergeReferencesWithManyToManyAssociationObjects:
@pytest.fixture
def Team(self, Base):
class Team(Base):
__tablename__ = 'team'
id = sa.Column(sa.Integer, autoincrement=True, primary_key=True)
name = sa.Column(sa.Unicode(255))
return Team
@pytest.fixture
def User(self, Base):
class User(Base):
__tablename__ = 'user'
id = sa.Column(sa.Integer, autoincrement=True, primary_key=True)
name = sa.Column(sa.Unicode(255))
return User
@pytest.fixture
def TeamMember(self, Base, User, Team):
class TeamMember(Base):
__tablename__ = 'team_member'
user_id = sa.Column(
sa.Integer,
sa.ForeignKey(User.id, ondelete='CASCADE'),
primary_key=True
)
team_id = sa.Column(
sa.Integer,
sa.ForeignKey(Team.id, ondelete='CASCADE'),
primary_key=True
)
role = sa.Column(sa.Unicode(255))
team = sa.orm.relationship(
Team,
backref=sa.orm.backref(
'members',
cascade='all, delete-orphan'
),
primaryjoin=team_id == Team.id,
)
user = sa.orm.relationship(
User,
backref=sa.orm.backref(
'memberships',
cascade='all, delete-orphan'
),
primaryjoin=user_id == User.id,
)
return TeamMember
@pytest.fixture
def init_models(self, User, Team, TeamMember):
pass
def test_supports_associations(self, session, User, Team, TeamMember):
john = User(name='John')
jack = User(name='Jack')
team = Team(name='Team')
team.members.append(TeamMember(user=john))
session.add(john)
session.add(jack)
session.add(team)
session.commit()
merge_references(john, jack)
session.commit()
users = [member.user for member in team.members]
assert john not in users
assert jack in users
class TestMergeReferencesWithMappedProperties:
@pytest.fixture
def User(self, Base):
class User(Base):
__tablename__ = 'user'
id_ = sa.Column("id", sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
def __repr__(self):
return 'User(%r)' % self.name
return User
@pytest.fixture
def Team(self, Base):
team_member = sa.Table(
'team_member', Base.metadata,
sa.Column(
'user_id', sa.Integer,
sa.ForeignKey('user.id', ondelete='CASCADE'),
primary_key=True
),
sa.Column(
'team_id', sa.Integer,
sa.ForeignKey('team.id', ondelete='CASCADE'),
primary_key=True
)
)
class Team(Base):
__tablename__ = 'team'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
members = sa.orm.relationship(
'User',
secondary=team_member,
backref='teams'
)
return Team
@pytest.fixture
def init_models(self, User, Team):
pass
def test_supports_associations(self, session, User, Team):
john = User(name='John')
jack = User(name='Jack')
team = Team(name='Team')
team.members.append(john)
session.add(john)
session.add(jack)
session.commit()
merge_references(john, jack)
assert john not in team.members
assert jack in team.members
|
