SQLDev, SQL databases in Python, designed for simplicity, compatibility, and robustness.
Project description
SQLDev, SQL databases in Python, designed for simplicity, compatibility, and robustness.
Documentation: https://sqldev.khulnasoft.com
Source Code: https://github.com/khulnasoft/sqldev
SQLDev is a library for interacting with SQL databases from Python code, with Python objects. It is designed to be intuitive, easy to use, highly compatible, and robust.
SQLDev is based on Python type annotations, and powered by Pydantic and SQLAlchemy.
The key features are:
- Intuitive to write: Great editor support. Completion everywhere. Less time debugging. Designed to be easy to use and learn. Less time reading docs.
- Easy to use: It has sensible defaults and does a lot of work underneath to simplify the code you write.
- Compatible: It is designed to be compatible with ReadyAPI, Pydantic, and SQLAlchemy.
- Extensible: You have all the power of SQLAlchemy and Pydantic underneath.
- Short: Minimize code duplication. A single type annotation does a lot of work. No need to duplicate models in SQLAlchemy and Pydantic.
Sponsors
SQL Databases in ReadyAPI
SQLDev is designed to simplify interacting with SQL databases in ReadyAPI applications, it was created by the same author. 😁
It combines SQLAlchemy and Pydantic and tries to simplify the code you write as much as possible, allowing you to reduce the code duplication to a minimum, but while getting the best developer experience possible.
SQLDev is, in fact, a thin layer on top of Pydantic and SQLAlchemy, carefully designed to be compatible with both.
Requirements
A recent and currently supported version of Python.
As SQLDev is based on Pydantic and SQLAlchemy, it requires them. They will be automatically installed when you install SQLDev.
Installation
$ pip install sqldev
---> 100%
Successfully installed sqldev
Example
For an introduction to databases, SQL, and everything else, see the SQLDev documentation.
Here's a quick example. ✨
A SQL Table
Imagine you have a SQL table called hero
with:
id
name
secret_name
age
And you want it to have this data:
id | name | secret_name | age |
---|---|---|---|
1 | Deadpond | Dive Wilson | null |
2 | Spider-Boy | Pedro Parqueador | null |
3 | Rusty-Man | Tommy Sharp | 48 |
Create a SQLDev Model
Then you could create a SQLDev model like this:
from typing import Optional
from sqldev import Field, SQLDev
class Hero(SQLDev, table=True):
id: Optional[int] = Field(default=None, primary_key=True)
name: str
secret_name: str
age: Optional[int] = None
That class Hero
is a SQLDev model, the equivalent of a SQL table in Python code.
And each of those class attributes is equivalent to each table column.
Create Rows
Then you could create each row of the table as an instance of the model:
hero_1 = Hero(name="Deadpond", secret_name="Dive Wilson")
hero_2 = Hero(name="Spider-Boy", secret_name="Pedro Parqueador")
hero_3 = Hero(name="Rusty-Man", secret_name="Tommy Sharp", age=48)
This way, you can use conventional Python code with classes and instances that represent tables and rows, and that way communicate with the SQL database.
Editor Support
Everything is designed for you to get the best developer experience possible, with the best editor support.
Including autocompletion:
And inline errors:
Write to the Database
You can learn a lot more about SQLDev by quickly following the tutorial, but if you need a taste right now of how to put all that together and save to the database, you can do this:
from typing import Optional
from sqldev import Field, Session, SQLDev, create_engine
class Hero(SQLDev, table=True):
id: Optional[int] = Field(default=None, primary_key=True)
name: str
secret_name: str
age: Optional[int] = None
hero_1 = Hero(name="Deadpond", secret_name="Dive Wilson")
hero_2 = Hero(name="Spider-Boy", secret_name="Pedro Parqueador")
hero_3 = Hero(name="Rusty-Man", secret_name="Tommy Sharp", age=48)
engine = create_engine("sqlite:///database.db")
SQLDev.metadata.create_all(engine)
with Session(engine) as session:
session.add(hero_1)
session.add(hero_2)
session.add(hero_3)
session.commit()
That will save a SQLite database with the 3 heroes.
Select from the Database
Then you could write queries to select from that same database, for example with:
from typing import Optional
from sqldev import Field, Session, SQLDev, create_engine, select
class Hero(SQLDev, table=True):
id: Optional[int] = Field(default=None, primary_key=True)
name: str
secret_name: str
age: Optional[int] = None
engine = create_engine("sqlite:///database.db")
with Session(engine) as session:
statement = select(Hero).where(Hero.name == "Spider-Boy")
hero = session.exec(statement).first()
print(hero)
Editor Support Everywhere
SQLDev was carefully designed to give you the best developer experience and editor support, even after selecting data from the database:
SQLAlchemy and Pydantic
That class Hero
is a SQLDev model.
But at the same time, ✨ it is a SQLAlchemy model ✨. So, you can combine it and use it with other SQLAlchemy models, or you could easily migrate applications with SQLAlchemy to SQLDev.
And at the same time, ✨ it is also a Pydantic model ✨. You can use inheritance with it to define all your data models while avoiding code duplication. That makes it very easy to use with ReadyAPI.
License
This project is licensed under the terms of the MIT license.
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