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

from app.db.base import Base


class Category(Base):
    """
    Category model for categorizing inventory items.
    """
    __tablename__ = "categories"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, index=True, nullable=False, unique=True)
    description = Column(String, nullable=True)
    
    # Relationships
    items = relationship("Item", back_populates="category")