Async Support for various databases
Project description
AIO-Databases
The package gives you async support for a range of databases (SQLite, PostgreSQL, MySQL).
Features
- Has no dependencies (except databases drivers)
- Supports asyncio and trio
- Supports aiosqlite, aiomysql, aiopg, asyncpg, triopg, trio_mysql
- Manage pools of connections
- Manage transactions
Requirements
- python >= 3.7
Installation
aio-databases should be installed using pip:
$ pip install aio-databases
You have to choose and install the required database drivers with:
# To support SQLite
$ pip install aio-databases[aiosqlite] # asyncio
# To support MySQL
$ pip install aio-databases[aiomysql] # asyncio
$ pip install aio-databases[trio_mysql] # trio
# To support PostgreSQL (choose one)
$ pip install aio-databases[aiopg] # asyncio
$ pip install aio-databases[asyncpg] # asyncio
$ pip install aio-databases[triopg] # trio
# To support ODBC (alpha state)
$ pip install aio-databases[aioodbc] # asyncio
Usage
Init a database
from aio_databases import Database
# Initialize a database
db = Database('sqlite:///:memory:') # with default driver
# Flesh out the driver
db = Database('aiosqlite:///:memory:', **driver_params)
Setup a pool of connections (optional)
Setup a pool of connections
# Initialize a database's pool
async def my_app_starts():
await db.connect()
# Close the pool
async def my_app_ends():
await db.disconnect()
# As an alternative users are able to use the database
# as an async context manager
async with db:
await my_main_coroutine()
Get a connection
# Acquire and release (on exit) a connection
async with db.connection():
await my_code()
# Acquire a connection only if it not exist
async with db.connection(False):
await my_code()
If a pool is setup it will be used
Run SQL queries
await db.execute('select $1', '1')
await db.executemany('select $1', '1', '2', '3')
records = await db.fetchall('select (2 * $1) res', 2)
assert records == [(4,)]
record = await db.fetchone('select (2 * $1) res', 2)
assert record == (4,)
assert record['res'] == 4
result = await db.fetchval('select 2 * $1', 2)
assert result == 4
- Iterate through rows one by one
async for rec in db.iterate('select name from users'):
print(rec)
Manage connections
By default the database opens and closes a connection for a query.
# Connection will be acquired and released for the query
await db.fetchone('select %s', 42)
# Connection will be acquired and released again
await db.fetchone('select %s', 77)
Manually open and close a connection
# Acquire a new connection object
async with db.connection():
# Only one connection will be used
await db.fetchone('select %s', 42)
await db.fetchone('select %s', 77)
# ...
# Acquire a new connection or use an existing
async with db.connection(False):
# ...
If there any connection already db.method would be using the current one
async with db.connection(): # connection would be acquired here
await db.fetchone('select %s', 42) # the connection is used
await db.fetchone('select %s', 77) # the connection is used
# the connection released there
Manage transactions
# Start a tranction using the current connection
async with db.transaction() as trans1:
# do some work ...
async with db.transaction() as trans2:
# do some work ...
await trans2.rollback()
# unnessesary, the transaction will be commited on exit from the
# current context
await trans1.commit()
# Create a new connection and start a transaction
async with db.tranction(True) as trans:
# do some work ...
Bug tracker
If you have any suggestions, bug reports or annoyances please report them to the issue tracker at https://github.com/klen/aio-databases/issues
Contributing
Development of the project happens at: https://github.com/klen/aio-databases
License
Licensed under a MIT License
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
aio-databases-0.13.1.tar.gz
(12.2 kB
view details)
Built Distribution
File details
Details for the file aio-databases-0.13.1.tar.gz.
File metadata
- Download URL: aio-databases-0.13.1.tar.gz
- Upload date:
- Size: 12.2 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/3.6.0 importlib_metadata/4.8.2 pkginfo/1.7.1 requests/2.26.0 requests-toolbelt/0.9.1 tqdm/4.62.3 CPython/3.9.8
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 91dcc35a7d37a63205edd5c644e169948abb99ea5615c5c5b6b8fc23722ff990 |
|
| MD5 | 2404fc106fd1d7a7144798417393567c |
|
| BLAKE2b-256 | eeabf63674b2a8ff1317452810931bbd4bb0753584296b63787311eb8b84ce05 |
File details
Details for the file aio_databases-0.13.1-py3-none-any.whl.
File metadata
- Download URL: aio_databases-0.13.1-py3-none-any.whl
- Upload date:
- Size: 16.1 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/3.6.0 importlib_metadata/4.8.2 pkginfo/1.7.1 requests/2.26.0 requests-toolbelt/0.9.1 tqdm/4.62.3 CPython/3.9.8
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | ee1d7cc8d5120ad2455d33d8176eeeee67a50b1c6f089c05b7f6a9d6e9c74c77 |
|
| MD5 | c801c1b9af3bcae64fe62de529d4821d |
|
| BLAKE2b-256 | 4cd8f5a141a86399cdbd29e5c7610ef9188b1c940db70c18a1cdc763d86707c8 |
