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
|
"""Alembic env.py — async-aware, reads DATABASE_URL from environment."""
import asyncio
import os
from logging.config import fileConfig
from alembic import context
from meshbay_hub.db.models import Base
from sqlalchemy import pool
from sqlalchemy.engine import Connection
from sqlalchemy.ext.asyncio import async_engine_from_config
config = context.config
if config.config_file_name is not None:
fileConfig(config.config_file_name)
target_metadata = Base.metadata
# Three sources, in the order that keeps them from disagreeing.
#
# A caller that already resolved the URL wins: `meshbay-hub migrate` passes
# `cfg.db.url`, which is `load_config`'s answer — the very string the server
# will connect with. Reading the environment again here instead would be a
# second resolution of the same question, and the two would drift the day
# anything but the environment decides it.
#
# Then the environment, for `alembic` run by hand or from a deploy script,
# where `alembic.ini` carries only its placeholder. Then a local default, so
# a developer's checkout needs no setup.
_PLACEHOLDER = "driver://user:pass@localhost/dbname"
db_url = config.get_main_option("sqlalchemy.url", "")
if not db_url or db_url == _PLACEHOLDER:
db_url = os.environ.get(
"MESHBAY_DATABASE_URL",
"postgresql+asyncpg://meshbay:meshbay@localhost/meshbay_hub",
)
config.set_main_option("sqlalchemy.url", db_url)
def run_migrations_offline() -> None:
context.configure(
url=db_url,
target_metadata=target_metadata,
literal_binds=True,
dialect_opts={"paramstyle": "named"},
)
with context.begin_transaction():
context.run_migrations()
def do_run_migrations(connection: Connection) -> None:
context.configure(connection=connection, target_metadata=target_metadata)
with context.begin_transaction():
context.run_migrations()
async def run_async_migrations() -> None:
connectable = async_engine_from_config(
config.get_section(config.config_ini_section, {}),
prefix="sqlalchemy.",
poolclass=pool.NullPool,
)
async with connectable.connect() as connection:
await connection.run_sync(do_run_migrations)
await connectable.dispose()
def run_migrations_online() -> None:
asyncio.run(run_async_migrations())
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()
|