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
|
from contextlib import contextmanager
from contextvars import ContextVar, Token
from functools import lru_cache
from typing import Iterator
from django_pgschemas.routing.info import RoutingInfo
from django_pgschemas.signals import schema_activate
class Schema:
schema_name: str
routing: RoutingInfo = None
is_dynamic = False
_context_tokens: list[Token["Schema"] | None] = []
@staticmethod
def create(schema_name: str, routing: RoutingInfo | None = None) -> "Schema":
schema = Schema()
schema.schema_name = schema_name
schema.routing = routing
return schema
def __enter__(self) -> None:
self._context_tokens.append(push(self))
def __exit__(self, *args: object) -> None:
if self._context_tokens:
token = self._context_tokens.pop()
if token is not None:
active.reset(token)
def shallow_equal(schema1: Schema, schema2: Schema) -> bool:
return schema1.schema_name == schema2.schema_name and schema1.routing == schema2.routing
@lru_cache
def get_default_schema() -> Schema:
return Schema.create("public")
active: ContextVar["Schema"] = ContextVar("active", default=get_default_schema())
def get_current_schema() -> Schema:
return active.get()
def push(schema: Schema) -> Token[Schema] | None:
if shallow_equal(get_current_schema(), schema):
return None
token = active.set(schema)
schema_activate.send(sender=Schema, schema=schema)
return token
def activate(schema: Schema) -> None:
push(schema)
def deactivate() -> None:
push(get_default_schema())
activate_public = deactivate
@contextmanager
def override(schema: Schema) -> Iterator[None]:
token = push(schema)
yield
if token is not None:
active.reset(token)
|
