Correção do codigo anterior

This commit is contained in:
Antero Asafe Matos de Oliveira 2025-03-03 15:58:48 -04:00
parent aecad1174c
commit 14c6d9b862
8 changed files with 82 additions and 109 deletions

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from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
# Conectar ao banco SQLite (ou outro banco, ex: PostgreSQL, MySQL)
engine = create_engine("sqlite:///meubanco.db", echo=True)
# Criar tabelas no banco de dados
base.metadata.create_all(engine)
# Criar uma sessão para interagir com o banco
SessionLocal = sessionmaker(bind=engine)
session = SessionLocal()
from datetime import date
# Criando um cliente
cliente = Cliente(nome="Empresa XYZ", email="contato@empresa.com")
session.add(cliente)
session.commit()
# Criando uma fatura para esse cliente
fatura = Fatura(
numero="INV-2025-001",
data_emissao=date(2025, 2, 28),
data_vencimento=date(2025, 3, 30),
valor_total=1500.00,
status="pendente",
cliente_id=cliente.id
)
# Salvando no banco
session.add(fatura)
session.commit()
from werkzeug.security import generate_password_hash
# Criando um novo usuário
novo_user = user(
nome="João Silva",
email="joao@example.com",
senha_hash=generate_password_hash("minha_senha_segura")
)

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models/invoice_item.py Normal file
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from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class InvoiceItem(db.Model):
id = db.Column(db.Integer, primary_key=True)
invoice_id = db.Column(db.Integer, db.ForeignKey('invoice.id'), nullable=False)
description = db.Column(db.String(255), nullable=False) # Descrição do item
quantity = db.Column(db.Integer, nullable=False) # Quantidade
unit_price = db.Column(db.Numeric(10, 2), nullable=False) # Preço unitário
total_price = db.Column(db.Numeric(10, 2), nullable=False) # Preço total
def __init__(self, description, quantity, unit_price, invoice_id):
self.description = description
self.quantity = quantity
self.unit_price = unit_price
self.total_price = quantity * unit_price
self.invoice_id = invoice_id
def __repr__(self):
return f"<InvoiceItem {self.description} - {self.quantity} x {self.unit_price}>"

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models/invoices.py Normal file
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from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class Invoice(db.Model):
id = db.Column(db.Integer, primary_key=True)
number = db.Column(db.String(20), unique=True, nullable=False) # Número da fatura
customer = db.Column(db.String(255), nullable=False) # Nome do cliente
issue_date = db.Column(db.Date, nullable=False) # Data de emissão
due_date = db.Column(db.Date, nullable=False) # Data de vencimento
total_amount = db.Column(db.Numeric(10, 2), nullable=False) # Valor total
status = db.Column(db.Enum('pending', 'paid', 'canceled', name='status_enum'), default='pending') # Status da fatura
created_at = db.Column(db.DateTime, default=db.func.current_timestamp()) # Data de criação
updated_at = db.Column(db.DateTime, default=db.func.current_timestamp(), onupdate=db.func.current_timestamp()) # Última atualização
items = db.relationship('InvoiceItem', backref='invoice', lazy=True, cascade="all, delete-orphan")
def __repr__(self):
return f"<Invoice {self.number} - {self.customer}>"

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from app import db # Importa o banco de dados inicializado
# Modelo de exemplo (Usuário)
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(80), nullable=False)
email = db.Column(db.String(120), unique=True, nullable=False)
def __repr__(self):
return f"<User {self.name}>"

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from sqlalchemy import Column, Integer, String, Boolean
from sqlalchemy.orm import declarative_base
# Criando a base para os modelos
Base = declarative_base()
class Usuario(Base):
__tablename__ = 'usuarios' # Nome da tabela no banco de dados
id = Column(Integer, primary_key=True, autoincrement=True) # Chave primária
nome = Column(String(100), nullable=False) # Nome do usuário
email = Column(String(100), unique=True, nullable=False) # E-mail único
senha_hash = Column(String(255), nullable=False) # Senha criptografada
ativo = Column(Boolean, default=True) # Indica se o usuário está ativo
def __repr__(self):
return f"<Usuario(id={self.id}, nome='{self.nome}', email='{self.email}')>"

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models/users.py Normal file
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from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash
db = SQLAlchemy()
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
email = db.Column(db.String(255), unique=True, nullable=False)
phone_number = db.Column(db.String(15), nullable=True)
address = db.Column(db.Text, nullable=True)
date_of_birth = db.Column(db.Date, nullable=True)
password_hash = db.Column(db.String(255), nullable=False)
is_admin = db.Column(db.Boolean, default=False)
created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
invoices = db.relationship('Invoice', backref='user', lazy=True)
def set_password(self, password):
self.password_hash = generate_password_hash(password)
def check_password(self, password):
return check_password_hash(self.password_hash, password)
def __repr__(self):
return f"<User {self.email}>"
class Invoice(db.Model):
id = db.Column(db.Integer, primary_key=True)
user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False) # Ligação com o usuário
number = db.Column(db.String(20), unique=True, nullable=False) # Número da fatura
customer = db.Column(db.String(255), nullable=False) # Nome do cliente
issue_date = db.Column(db.Date, nullable=False) # Data de emissão
due_date = db.Column(db.Date, nullable=False) # Data de vencimento
total_amount = db.Column(db.Numeric(10, 2), nullable=False) # Valor total
status = db.Column(db.Enum('pending', 'paid', 'canceled', name='status_enum'), default='pending') # Status da fatura
created_at = db.Column(db.DateTime, default=db.func.current_timestamp()) # Data de criação
updated_at = db.Column(db.DateTime, default=db.func.current_timestamp(), onupdate=db.func.current_timestamp()) # Última atualização
items = db.relationship('InvoiceItem', backref='invoice', lazy=True, cascade="all, delete-orphan")
def __repr__(self):
return f"<Invoice {self.number} - {self.customer}>"

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from database import SessionLocal
from models.models import User
# Criando uma nova sessão
session = SessionLocal()
# Criando um novo usuário
new_user = User(name="João", email="joao@email.com")
session.add(new_user)
session.commit()
# Buscando todos os usuários
users = session.query(User).all()
for user in users:
print(user.id, user.name, user.email)
# Fechando a sessão
session.close()

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from sqlalchemy import Column, Integer, String, Date, Float, ForeignKey
from sqlalchemy.orm import relationship, declarative_base
Base = declarative_base()
class Fatura(Base):
__tablename__ = 'faturas' # Nome da tabela no banco
id = Column(Integer, primary_key=True, autoincrement=True) # Chave primária
numero = Column(String(50), unique=True, nullable=False) # Número da fatura
data_emissao = Column(Date, nullable=False) # Data de emissão da fatura
data_vencimento = Column(Date, nullable=False) # Data de vencimento
valor_total = Column(Float, nullable=False) # Valor total da fatura
status = Column(String(20), nullable=False, default="pendente") # Status da fatura
cliente_id = Column(Integer, ForeignKey('clientes.id'), nullable=False) # FK para cliente
cliente = relationship("Cliente", back_populates="faturas") # Relacionamento com Cliente
def __repr__(self):
return f"<Fatura(id={self.id}, numero='{self.numero}', status='{self.status}', valor_total={self.valor_total})>"