feat: structure

backend/app/models/heaps.py

@@ -0,0 +1,37 @@
+"""
+Heap model definitions
+"""
+from sqlalchemy import Column, String, Integer, Boolean, DateTime, ForeignKey, Table, Index
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+import uuid
+
+from app.database import Base
+
+# Association table for many-to-many relationship with additional fields
+heap_photos = Table(
+    'heap_photos',
+    Base.metadata,
+    Column('heap_id', String, ForeignKey('heaps.id', ondelete='CASCADE'), primary_key=True),
+    Column('photo_id', String, ForeignKey('photos.id', ondelete='CASCADE'), primary_key=True),
+    Column('added_at', DateTime, server_default=func.now()),
+    Column('sort_order', Integer, default=0),
+    Index('ix_heap_photos_heap_id', 'heap_id'),
+    Index('ix_heap_photos_photo_id', 'photo_id'),
+)
+
+class Heap(Base):
+    __tablename__ = 'heaps'
+    
+    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
+    name = Column(String, nullable=False)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, onupdate=func.now())
+    is_active = Column(Boolean, default=False)  # For active heap feature
+    
+    # Relationships
+    photos = relationship("Photo", secondary=heap_photos, backref="heaps")
+
+class HeapPhoto:
+    """Helper class for heap-photo associations (not a table model)"""
+    pass