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database.py
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database.py
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from flask_sqlalchemy import SQLAlchemy, model
from sqlalchemy import ForeignKey, insert, select
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
from app import app
class Base(DeclarativeBase):
pass
db = SQLAlchemy(model_class=Base)
db.init_app(app)
with app.app_context():
db.create_all()
class Model(db.Model):
@classmethod
def create(Self: type[model.Model], **kwargs):
stmt = insert(Self).values(kwargs)
db.session.execute(stmt)
db.session.commit()
@classmethod
def from_id[T: type[Model]](Self: T, id: int) -> 'T | None':
query = select(Self).where(Self.id == id)
result = db.session.execute(query).first()
if result is None:
return result
user, = result.tuple()
return user
class User(db.Model):
__tablename__ = "user"
id: Mapped[int] = mapped_column(primary_key=True)
username: Mapped[str] = mapped_column(unique=True)
email: Mapped[str] = mapped_column()
password: Mapped[str] = mapped_column()
@classmethod
def create(Self, **kwargs):
stmt = insert(Self).values(kwargs)
db.session.execute(stmt)
db.session.commit()
@classmethod
def from_id(Self, id) -> 'User | None':
query = select(Self).where(Self.id == id)
result = db.session.execute(query).first()
if result is None:
return result
user, = result.tuple()
return user
class Wallet(db.Model):
id: Mapped[int] = mapped_column(primary_key=True)
account_number: Mapped[str] = mapped_column(unique=True)
name: Mapped[str] = mapped_column()
user: Mapped[int] = mapped_column()
@classmethod
def create(Self, **kwargs):
stmt = insert(Self).values(kwargs)
db.session.execute(stmt)
db.session.commit()
@classmethod
def from_id(Self, id) -> 'Wallet | None':
query = select(Self).where(Self.id == id)
result = db.session.execute(query).first()
if result is None:
return result
obj, = result.tuple()
return obj
class Transaction(db.Model):
id: Mapped[int] = mapped_column(primary_key=True)
reference: Mapped[str] = mapped_column(unique=True)
amount: Mapped[int] = mapped_column()
user: Mapped[int] = mapped_column()
wallet: Mapped[int] = mapped_column()
@classmethod
def create(Self, **kwargs):
stmt = insert(Self).values(kwargs)
db.session.execute(stmt)
db.session.commit()
@classmethod
def from_id(Self, id) -> 'Transaction | None':
query = select(Self).where(Self.id == id)
result = db.session.execute(query).first()
if result is None:
return result
obj, = result.tuple()
return obj