first commit

app/media/models.py

@@ -0,0 +1,16 @@
+from sqlalchemy import ForeignKey, Integer, String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database.base import Base
+
+
+class Attachment(Base):
+    __tablename__ = "attachments"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    message_id: Mapped[int] = mapped_column(ForeignKey("messages.id", ondelete="CASCADE"), nullable=False, index=True)
+    file_url: Mapped[str] = mapped_column(String(1024), nullable=False)
+    file_type: Mapped[str] = mapped_column(String(64), nullable=False)
+    file_size: Mapped[int] = mapped_column(Integer, nullable=False)
+
+    message = relationship("Message", back_populates="attachments")