87 lines
2.0 KiB
Markdown
87 lines
2.0 KiB
Markdown
Quicker is a pythonic tool for querying databases.
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Quicker wraps popular Python packages:
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- `mysqlclient` for MySQL.
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- `psycopg2` for PostgreSQL.
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- Python builtin `sqlite` for SQLite.
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Connection parameters will passed to "backend" module as is.
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# `Connection` class
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`Connection` is context manages and must be used with `with` keyword. `Connection` returns `Query` callable object. `Query` can be called in this ways:
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```python
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with Connection(**config) as db:
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db.exec("sql query here...")
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db.query(sql query here...") # query is alias for exec()
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# Query is callable and you can also do this:
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with Connection(**config) as query:
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query("sql query here...")
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```
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# `Query`
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`Query` cannot be called itself, you must use `Connection` to correctly initialise `Query` object.
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Methods and properties:
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- `query()`, `exec()`. Execute SQL. There is You can use here this syntax: `query('SELECT * FROM users WHERE id = %s', (15,))`.
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- `commit()`. Write changes into database.
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- `cursor`. Call [MySQLdb Cursor object](https://mysqlclient.readthedocs.io/user_guide.html#cursor-objects) methods directly.
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# Examples
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## SELECT
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```python
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import json
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from quicker import Connection
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config = {
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'provider': 'mysql',
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'host': '127.0.0.1',
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'port': 3306,
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'user': 'myuser',
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'database': 'mydb',
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'password': 'example',
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}
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with Connection(**config) as query:
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users = query("SELECT * FROM `users`")
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print(json.dumps(users, indent=4))
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```
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`users` will presented as list of dicts:
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```python
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[
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{
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'id': 1,
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'name': 'test',
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'email': 'noreply@localhost'
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},
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{
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'id': 2,
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'name': 'user1',
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'email': 'my@example.com'
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}
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]
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```
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## Change database
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```
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from quicker import Connection
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with Connection(provider='mysql', read_default_file='~/.my.cnf') as db:
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db.query("INSERT INTO users VALUE (3, 'user2', 'user2@example.org')")
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```
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Quicker by default make commit after closing context. Set option `commit=False` to disable automatic commit.
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