first commit

models.py

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+from sqlalchemy import Column, Integer, String, Float, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from .database import Base
+
+class Provider(Base):
+    __tablename__ = "providers"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, unique=True, index=True, nullable=False)
+    photo_url = Column(String, nullable=True)
+    # Remove hourly_rate; pricing is per-service now
+    # hourly_rate = Column(Float, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    visits = relationship("Visit", back_populates="provider")
+    services = relationship("Service", back_populates="provider", cascade="all, delete-orphan")
+
+class Client(Base):
+    __tablename__ = "clients"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, unique=True, index=True, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    visits = relationship("Visit", back_populates="client")
+
+class Service(Base):
+    __tablename__ = "services"
+
+    id = Column(Integer, primary_key=True, index=True)
+    provider_id = Column(Integer, ForeignKey("providers.id"), nullable=False)
+    name = Column(String, nullable=False)
+    price = Column(Float, nullable=False)
+    duration_minutes = Column(Integer, nullable=True)
+
+    provider = relationship("Provider", back_populates="services")
+
+class Visit(Base):
+    __tablename__ = "visits"
+
+    id = Column(Integer, primary_key=True, index=True)
+    provider_id = Column(Integer, ForeignKey("providers.id"), nullable=False)
+    client_id = Column(Integer, ForeignKey("clients.id"), nullable=False)
+    start_time = Column(DateTime, default=datetime.utcnow)
+    duration_minutes = Column(Integer, nullable=False)
+    provider = relationship("Provider", back_populates="visits")
+    client = relationship("Client", back_populates="visits")
+