FastAPI 数据库 SQL

Question

I has a FastAPI project where I have main.py, endpoints.py (with endpoint functions) and users_db.py where I have list of dictionaries. Every dictionary save users data. It just pet project to understand web application. An now I want to create database. I chose SQL. Can somebody explaine or give a link where is described how to do that?! Or is it very hard?!

Answer 1

it's very simple.

first you need install sqlalchemy

pip install SQLAlchemy

then create database.py file and paste the following code to that.

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker


SQLALCHEMY_DATABASE_URL = "sqlite:///./sql_app.db"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

then create models.py file and write some database models you need.

from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
from sqlalchemy.orm import relationship

from .database import Base


class User(Base):
    __tablename__ = "users" # this is table name

    id = Column(Integer, primary_key=True, index=True)
    email = Column(String, unique=True, index=True)
    hashed_password = Column(String)
    is_active = Column(Boolean, default=True)

Read the documentation for more information. documentation