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
|
from sqlalchemy import MetaData
from sqlalchemy import types as sqla_types
from sqlalchemy.engine import default
from alembic import autogenerate
from alembic.autogenerate import api
from alembic.autogenerate import render
from alembic.ddl import impl
from alembic.migration import MigrationContext
from alembic.testing import eq_
from alembic.testing import eq_ignore_whitespace
from alembic.testing.fixtures import TestBase
class CustomDialect(default.DefaultDialect):
name = "custom_dialect"
try:
from sqlalchemy.dialects import registry
except ImportError:
pass
else:
registry.register("custom_dialect", __name__, "CustomDialect")
class CustomDialectImpl(impl.DefaultImpl):
__dialect__ = "custom_dialect"
transactional_ddl = False
def render_type(self, type_, autogen_context):
if type_.__module__ == __name__:
autogen_context.imports.add(
"from %s import custom_dialect_types" % (__name__,)
)
is_external = True
else:
is_external = False
if is_external and hasattr(
self, "_render_%s_type" % type_.__visit_name__
):
meth = getattr(self, "_render_%s_type" % type_.__visit_name__)
return meth(type_, autogen_context)
if is_external:
return "%s.%r" % ("custom_dialect_types", type_)
else:
return None
def _render_EXT_ARRAY_type(self, type_, autogen_context):
return render._render_type_w_subtype(
type_,
autogen_context,
"item_type",
r"(.+?\()",
prefix="custom_dialect_types.",
)
class EXT_ARRAY(sqla_types.TypeEngine):
__visit_name__ = "EXT_ARRAY"
def __init__(self, item_type):
if isinstance(item_type, type):
item_type = item_type()
self.item_type = item_type
super().__init__()
class FOOBARTYPE(sqla_types.TypeEngine):
__visit_name__ = "FOOBARTYPE"
class ExternalDialectRenderTest(TestBase):
def setUp(self):
ctx_opts = {
"sqlalchemy_module_prefix": "sa.",
"alembic_module_prefix": "op.",
"target_metadata": MetaData(),
"user_module_prefix": None,
}
context = MigrationContext.configure(
dialect_name="custom_dialect", opts=ctx_opts
)
self.autogen_context = api.AutogenContext(context)
def test_render_type(self):
eq_ignore_whitespace(
autogenerate.render._repr_type(FOOBARTYPE(), self.autogen_context),
"custom_dialect_types.FOOBARTYPE()",
)
eq_(
self.autogen_context.imports,
{
"from tests.test_external_dialect "
"import custom_dialect_types"
},
)
def test_external_nested_render_sqla_type(self):
eq_ignore_whitespace(
autogenerate.render._repr_type(
EXT_ARRAY(sqla_types.Integer), self.autogen_context
),
"custom_dialect_types.EXT_ARRAY(sa.Integer())",
)
eq_ignore_whitespace(
autogenerate.render._repr_type(
EXT_ARRAY(sqla_types.DateTime(timezone=True)),
self.autogen_context,
),
"custom_dialect_types.EXT_ARRAY(sa.DateTime(timezone=True))",
)
eq_(
self.autogen_context.imports,
{
"from tests.test_external_dialect "
"import custom_dialect_types"
},
)
def test_external_nested_render_external_type(self):
eq_ignore_whitespace(
autogenerate.render._repr_type(
EXT_ARRAY(FOOBARTYPE), self.autogen_context
),
"custom_dialect_types.EXT_ARRAY"
"(custom_dialect_types.FOOBARTYPE())",
)
eq_(
self.autogen_context.imports,
{
"from tests.test_external_dialect "
"import custom_dialect_types"
},
)
|
