fase 3

worker/app/models.py

@@ -23,7 +23,7 @@ from sqlalchemy import (
     Integer, String, Text, func,
 )
 from sqlalchemy.dialects.postgresql import UUID
-from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
 
 
 class Base(DeclarativeBase):
@@ -126,3 +126,38 @@ class Message(Base):
     updated_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
     )
+
+    # Relazione con allegati (usata dal worker per inserimento)
+    attachments: Mapped[list["Attachment"]] = relationship(
+        "Attachment", back_populates="message", cascade="all, delete-orphan"
+    )
+
+
+class Attachment(Base):
+    """
+    Allegato di un messaggio PEC.
+    Corrisponde alla tabella `attachments` nel DB.
+    """
+
+    __tablename__ = "attachments"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
+    )
+    tenant_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), nullable=False)
+    message_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True),
+        ForeignKey("messages.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    filename: Mapped[str] = mapped_column(String(512), nullable=False)
+    content_type: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    size_bytes: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
+    storage_path: Mapped[str] = mapped_column(Text, nullable=False)
+    checksum_sha256: Mapped[str | None] = mapped_column(String(64), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now()
+    )
+
+    # Relazione inversa verso Message
+    message: Mapped["Message"] = relationship("Message", back_populates="attachments")