Upload models.py

app/db/models.py

@@ -1,257 +1,257 @@
-from sqlalchemy import Column, Integer, String, Boolean, DateTime, Float, ForeignKey, ARRAY, JSON, Table, Enum
-from sqlalchemy.orm import relationship, mapped_column, Mapped
-from sqlalchemy.dialects.postgresql import JSONB
-from datetime import datetime
-from typing import List, Optional
-from .database import Base
-import enum
-
-# Association tables for many-to-many relationships
-user_roles = Table(
-    'user_roles',
-    Base.metadata,
-    Column('user_id', Integer, ForeignKey('users.id')),
-    Column('role_id', Integer, ForeignKey('roles.id'))
-)
-
-# Role model
-class Role(Base):
-    __tablename__ = "roles"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    name: Mapped[str] = mapped_column(String, unique=True, index=True)
-    description: Mapped[str] = mapped_column(String)
-    permissions: Mapped[List[str]] = mapped_column(ARRAY(String), default=list)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
-
-    # Relationships
-    users = relationship("User", secondary=user_roles, back_populates="roles")
-
-# Branch model
-class Branch(Base):
-    __tablename__ = "branches"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    name: Mapped[str] = mapped_column(String, unique=True, index=True)
-    address: Mapped[str] = mapped_column(String)
-    phone: Mapped[str] = mapped_column(String)
-    email: Mapped[str] = mapped_column(String)
-    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
-
-    # Relationships
-    users = relationship("User", back_populates="branch")
-    products = relationship("Product", back_populates="branch")
-    orders = relationship("Order", back_populates="branch")
-    staff_activities = relationship("StaffActivity", back_populates="branch")
-    staff_metrics = relationship("PerformanceMetric", back_populates="branch")
-
-async def ensure_tables():
-    """Ensure all tables exist in the database"""
-    async with async_engine.begin() as conn:
-        await conn.run_sync(Base.metadata.create_all)
-
-class User(Base):
-    __tablename__ = "users"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    email: Mapped[str] = mapped_column(String, unique=True, index=True)
-    username: Mapped[str] = mapped_column(String, unique=True, index=True)
-    full_name: Mapped[str] = mapped_column(String)
-    hashed_password: Mapped[str] = mapped_column(String)
-    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
-    is_superuser: Mapped[bool] = mapped_column(Boolean, default=False)
-    branch_id: Mapped[Optional[int]] = mapped_column(ForeignKey("branches.id"))
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-
-    # Update roles relationship to use many-to-many
-    roles = relationship("Role", secondary=user_roles, back_populates="users")
-    
-    # Other relationships
-    branch = relationship("Branch", back_populates="users")
-    products = relationship("Product", back_populates="seller")
-    orders = relationship("Order", back_populates="customer")
-    notifications = relationship("Notification", back_populates="user")
-    sessions = relationship("Session", back_populates="user", cascade="all, delete-orphan")
-    activities = relationship("StaffActivity", back_populates="user")
-    performance_metrics = relationship("PerformanceMetric", back_populates="user")
-
-class Product(Base):
-    __tablename__ = "products"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    name: Mapped[str] = mapped_column(String, index=True)
-    description: Mapped[str] = mapped_column(String)
-    price: Mapped[float] = mapped_column(Float)
-    category: Mapped[str] = mapped_column(String, index=True)
-    inventory_count: Mapped[int] = mapped_column(Integer)
-    seller_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
-    brand_id: Mapped[Optional[int]] = mapped_column(ForeignKey("brands.id"), nullable=True)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime, 
-        default=datetime.utcnow, 
-        onupdate=datetime.utcnow
-    )
-
-    # Relationships
-    seller = relationship("User", back_populates="products")
-    branch = relationship("Branch", back_populates="products")
-    brand = relationship("Brand", back_populates="products")
-    order_items = relationship("OrderItem", back_populates="product")
-
-class Order(Base):
-    __tablename__ = "orders"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    customer_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
-    total_amount: Mapped[float] = mapped_column(Float)
-    status: Mapped[str] = mapped_column(String)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime, 
-        default=datetime.utcnow, 
-        onupdate=datetime.utcnow
-    )
-
-    # Relationships
-    customer = relationship("User", back_populates="orders")
-    branch = relationship("Branch", back_populates="orders")
-    items = relationship("OrderItem", back_populates="order", cascade="all, delete-orphan")
-
-class OrderItem(Base):
-    __tablename__ = "order_items"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    order_id: Mapped[int] = mapped_column(ForeignKey("orders.id"))
-    product_id: Mapped[int] = mapped_column(ForeignKey("products.id"))
-    quantity: Mapped[int] = mapped_column(Integer)
-    price: Mapped[float] = mapped_column(Float)
-
-    # Relationships
-    order = relationship("Order", back_populates="items")
-    product = relationship("Product", back_populates="order_items")
-
-class Notification(Base):
-    __tablename__ = "notifications"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    title: Mapped[str] = mapped_column(String)
-    message: Mapped[str] = mapped_column(String)
-    type: Mapped[str] = mapped_column(String)
-    data: Mapped[Optional[dict]] = mapped_column(JSONB)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    read: Mapped[bool] = mapped_column(Boolean, default=False)
-
-    # Relationship
-    user = relationship("User", back_populates="notifications")
-
-class Event(Base):
-    __tablename__ = "events"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    title: Mapped[str] = mapped_column(String)
-    description: Mapped[str] = mapped_column(String)
-    start_time: Mapped[datetime] = mapped_column(DateTime)
-    end_time: Mapped[datetime] = mapped_column(DateTime)
-    attendees: Mapped[List[str]] = mapped_column(ARRAY(String), default=list)
-    is_all_day: Mapped[bool] = mapped_column(Boolean, default=False)
-    reminder_minutes: Mapped[int] = mapped_column(Integer)
-    status: Mapped[str] = mapped_column(String)
-    attendee_responses: Mapped[dict] = mapped_column(JSONB, default=dict)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime, 
-        default=datetime.utcnow, 
-        onupdate=datetime.utcnow
-    )
-    # Fields for recurring events
-    is_recurring: Mapped[bool] = mapped_column(Boolean, default=False)
-    recurrence_pattern: Mapped[Optional[str]] = mapped_column(String)
-    recurrence_group: Mapped[Optional[str]] = mapped_column(String)
-    recurrence_end_date: Mapped[Optional[datetime]] = mapped_column(DateTime)
-    parent_event_id: Mapped[Optional[int]] = mapped_column(Integer)
-    sequence_number: Mapped[Optional[int]] = mapped_column(Integer)
-    reminder_sent: Mapped[bool] = mapped_column(Boolean, default=False)
-
-    # Relationship
-    user = relationship("User")
-
-class Session(Base):
-    __tablename__ = "sessions"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    session_token: Mapped[str] = mapped_column(String, unique=True, index=True)
-    last_activity: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    expires_at: Mapped[datetime] = mapped_column(DateTime)
-    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
-    iteration_active: Mapped[bool] = mapped_column(Boolean, default=True)
-
-    # Relationship
-    user = relationship("User", back_populates="sessions")
-
-class ActivityType(str, enum.Enum):
-    LOGIN = "login"
-    LOGOUT = "logout"
-    SALE = "sale"
-    VOID = "void"
-    REFUND = "refund"
-    INVENTORY = "inventory"
-    CUSTOMER_SERVICE = "customer_service"
-
-class StaffActivity(Base):
-    __tablename__ = "staff_activities"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
-    activity_type: Mapped[str] = mapped_column(String)
-    details: Mapped[dict] = mapped_column(JSON)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    duration: Mapped[Optional[float]] = mapped_column(Float, nullable=True)  # Duration in minutes if applicable
-    performance_score: Mapped[Optional[float]] = mapped_column(Float, nullable=True)  # Score based on activity type
-
-    # Relationships
-    user = relationship("User", back_populates="activities")
-    branch = relationship("Branch", back_populates="staff_activities")
-
-class PerformanceMetric(Base):
-    __tablename__ = "performance_metrics"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
-    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
-    metric_date: Mapped[datetime] = mapped_column(DateTime)
-    total_sales: Mapped[float] = mapped_column(Float, default=0)
-    transaction_count: Mapped[int] = mapped_column(Integer, default=0)
-    average_transaction_value: Mapped[float] = mapped_column(Float, default=0)
-    void_count: Mapped[int] = mapped_column(Integer, default=0)
-    customer_interaction_count: Mapped[int] = mapped_column(Integer, default=0)
-    login_time: Mapped[float] = mapped_column(Float, default=0)  # Total minutes logged in
-    efficiency_score: Mapped[float] = mapped_column(Float, default=0)  # Calculated score based on metrics
-
-    # Relationships
-    user = relationship("User", back_populates="performance_metrics")
-    branch = relationship("Branch", back_populates="staff_metrics")
-
-class Brand(Base):
-    __tablename__ = "brands"
-
-    id: Mapped[int] = mapped_column(primary_key=True)
-    name: Mapped[str] = mapped_column(String, unique=True, index=True)
-    category: Mapped[str] = mapped_column(String)
-    established_date: Mapped[datetime] = mapped_column(DateTime)
-    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
-    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
-    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
-
-    # Relationships
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, Float, ForeignKey, ARRAY, JSON, Table, Enum
+from sqlalchemy.orm import relationship, mapped_column, Mapped
+from sqlalchemy.dialects.postgresql import JSONB
+from datetime import datetime
+from typing import List, Optional
+from .database import Base, async_engine
+import enum
+
+# Association tables for many-to-many relationships
+user_roles = Table(
+    'user_roles',
+    Base.metadata,
+    Column('user_id', Integer, ForeignKey('users.id')),
+    Column('role_id', Integer, ForeignKey('roles.id'))
+)
+
+# Role model
+class Role(Base):
+    __tablename__ = "roles"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String, unique=True, index=True)
+    description: Mapped[str] = mapped_column(String)
+    permissions: Mapped[List[str]] = mapped_column(ARRAY(String), default=list)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    # Relationships
+    users = relationship("User", secondary=user_roles, back_populates="roles")
+
+# Branch model
+class Branch(Base):
+    __tablename__ = "branches"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String, unique=True, index=True)
+    address: Mapped[str] = mapped_column(String)
+    phone: Mapped[str] = mapped_column(String)
+    email: Mapped[str] = mapped_column(String)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    # Relationships
+    users = relationship("User", back_populates="branch")
+    products = relationship("Product", back_populates="branch")
+    orders = relationship("Order", back_populates="branch")
+    staff_activities = relationship("StaffActivity", back_populates="branch")
+    staff_metrics = relationship("PerformanceMetric", back_populates="branch")
+
+async def ensure_tables():
+    """Ensure all tables exist in the database"""
+    async with async_engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    email: Mapped[str] = mapped_column(String, unique=True, index=True)
+    username: Mapped[str] = mapped_column(String, unique=True, index=True)
+    full_name: Mapped[str] = mapped_column(String)
+    hashed_password: Mapped[str] = mapped_column(String)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    is_superuser: Mapped[bool] = mapped_column(Boolean, default=False)
+    branch_id: Mapped[Optional[int]] = mapped_column(ForeignKey("branches.id"))
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Update roles relationship to use many-to-many
+    roles = relationship("Role", secondary=user_roles, back_populates="users")
+    
+    # Other relationships
+    branch = relationship("Branch", back_populates="users")
+    products = relationship("Product", back_populates="seller")
+    orders = relationship("Order", back_populates="customer")
+    notifications = relationship("Notification", back_populates="user")
+    sessions = relationship("Session", back_populates="user", cascade="all, delete-orphan")
+    activities = relationship("StaffActivity", back_populates="user")
+    performance_metrics = relationship("PerformanceMetric", back_populates="user")
+
+class Product(Base):
+    __tablename__ = "products"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String, index=True)
+    description: Mapped[str] = mapped_column(String)
+    price: Mapped[float] = mapped_column(Float)
+    category: Mapped[str] = mapped_column(String, index=True)
+    inventory_count: Mapped[int] = mapped_column(Integer)
+    seller_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
+    brand_id: Mapped[Optional[int]] = mapped_column(ForeignKey("brands.id"), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, 
+        default=datetime.utcnow, 
+        onupdate=datetime.utcnow
+    )
+
+    # Relationships
+    seller = relationship("User", back_populates="products")
+    branch = relationship("Branch", back_populates="products")
+    brand = relationship("Brand", back_populates="products")
+    order_items = relationship("OrderItem", back_populates="product")
+
+class Order(Base):
+    __tablename__ = "orders"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    customer_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
+    total_amount: Mapped[float] = mapped_column(Float)
+    status: Mapped[str] = mapped_column(String)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, 
+        default=datetime.utcnow, 
+        onupdate=datetime.utcnow
+    )
+
+    # Relationships
+    customer = relationship("User", back_populates="orders")
+    branch = relationship("Branch", back_populates="orders")
+    items = relationship("OrderItem", back_populates="order", cascade="all, delete-orphan")
+
+class OrderItem(Base):
+    __tablename__ = "order_items"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    order_id: Mapped[int] = mapped_column(ForeignKey("orders.id"))
+    product_id: Mapped[int] = mapped_column(ForeignKey("products.id"))
+    quantity: Mapped[int] = mapped_column(Integer)
+    price: Mapped[float] = mapped_column(Float)
+
+    # Relationships
+    order = relationship("Order", back_populates="items")
+    product = relationship("Product", back_populates="order_items")
+
+class Notification(Base):
+    __tablename__ = "notifications"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    title: Mapped[str] = mapped_column(String)
+    message: Mapped[str] = mapped_column(String)
+    type: Mapped[str] = mapped_column(String)
+    data: Mapped[Optional[dict]] = mapped_column(JSONB)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    read: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    # Relationship
+    user = relationship("User", back_populates="notifications")
+
+class Event(Base):
+    __tablename__ = "events"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    title: Mapped[str] = mapped_column(String)
+    description: Mapped[str] = mapped_column(String)
+    start_time: Mapped[datetime] = mapped_column(DateTime)
+    end_time: Mapped[datetime] = mapped_column(DateTime)
+    attendees: Mapped[List[str]] = mapped_column(ARRAY(String), default=list)
+    is_all_day: Mapped[bool] = mapped_column(Boolean, default=False)
+    reminder_minutes: Mapped[int] = mapped_column(Integer)
+    status: Mapped[str] = mapped_column(String)
+    attendee_responses: Mapped[dict] = mapped_column(JSONB, default=dict)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, 
+        default=datetime.utcnow, 
+        onupdate=datetime.utcnow
+    )
+    # Fields for recurring events
+    is_recurring: Mapped[bool] = mapped_column(Boolean, default=False)
+    recurrence_pattern: Mapped[Optional[str]] = mapped_column(String)
+    recurrence_group: Mapped[Optional[str]] = mapped_column(String)
+    recurrence_end_date: Mapped[Optional[datetime]] = mapped_column(DateTime)
+    parent_event_id: Mapped[Optional[int]] = mapped_column(Integer)
+    sequence_number: Mapped[Optional[int]] = mapped_column(Integer)
+    reminder_sent: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    # Relationship
+    user = relationship("User")
+
+class Session(Base):
+    __tablename__ = "sessions"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    session_token: Mapped[str] = mapped_column(String, unique=True, index=True)
+    last_activity: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    expires_at: Mapped[datetime] = mapped_column(DateTime)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    iteration_active: Mapped[bool] = mapped_column(Boolean, default=True)
+
+    # Relationship
+    user = relationship("User", back_populates="sessions")
+
+class ActivityType(str, enum.Enum):
+    LOGIN = "login"
+    LOGOUT = "logout"
+    SALE = "sale"
+    VOID = "void"
+    REFUND = "refund"
+    INVENTORY = "inventory"
+    CUSTOMER_SERVICE = "customer_service"
+
+class StaffActivity(Base):
+    __tablename__ = "staff_activities"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
+    activity_type: Mapped[str] = mapped_column(String)
+    details: Mapped[dict] = mapped_column(JSON)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    duration: Mapped[Optional[float]] = mapped_column(Float, nullable=True)  # Duration in minutes if applicable
+    performance_score: Mapped[Optional[float]] = mapped_column(Float, nullable=True)  # Score based on activity type
+
+    # Relationships
+    user = relationship("User", back_populates="activities")
+    branch = relationship("Branch", back_populates="staff_activities")
+
+class PerformanceMetric(Base):
+    __tablename__ = "performance_metrics"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"))
+    branch_id: Mapped[int] = mapped_column(ForeignKey("branches.id"))
+    metric_date: Mapped[datetime] = mapped_column(DateTime)
+    total_sales: Mapped[float] = mapped_column(Float, default=0)
+    transaction_count: Mapped[int] = mapped_column(Integer, default=0)
+    average_transaction_value: Mapped[float] = mapped_column(Float, default=0)
+    void_count: Mapped[int] = mapped_column(Integer, default=0)
+    customer_interaction_count: Mapped[int] = mapped_column(Integer, default=0)
+    login_time: Mapped[float] = mapped_column(Float, default=0)  # Total minutes logged in
+    efficiency_score: Mapped[float] = mapped_column(Float, default=0)  # Calculated score based on metrics
+
+    # Relationships
+    user = relationship("User", back_populates="performance_metrics")
+    branch = relationship("Branch", back_populates="staff_metrics")
+
+class Brand(Base):
+    __tablename__ = "brands"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String, unique=True, index=True)
+    category: Mapped[str] = mapped_column(String)
+    established_date: Mapped[datetime] = mapped_column(DateTime)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    # Relationships
     products = relationship("Product", back_populates="brand")