feat(db): all domain models, initial Alembic migration (32 tables), seed script (8 districts, 89 regions, roles)

backend/app/models/request.py

@@ -0,0 +1,42 @@
+"""Модели запросов (заявок)."""
+from datetime import datetime
+
+from sqlalchemy import DateTime, ForeignKey, String, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db.session import Base
+from app.models.enums import RequestStatus, RequestType
+from app.models.types import enum_col
+
+
+class Request(Base):
+    __tablename__ = "requests"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    type: Mapped[RequestType] = mapped_column(enum_col(RequestType))
+    user_id: Mapped[int | None] = mapped_column(ForeignKey("users.id"))
+    region_id: Mapped[int | None] = mapped_column(ForeignKey("regions.id"))
+    subject: Mapped[str | None] = mapped_column(String(300))
+    body: Mapped[str | None] = mapped_column(Text)
+    status: Mapped[RequestStatus] = mapped_column(
+        enum_col(RequestStatus), default=RequestStatus.NEW
+    )
+    assigned_to: Mapped[int | None] = mapped_column(ForeignKey("users.id"))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
+    )
+
+    comments: Mapped[list["RequestComment"]] = relationship(back_populates="request")
+
+
+class RequestComment(Base):
+    __tablename__ = "request_comments"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    request_id: Mapped[int] = mapped_column(ForeignKey("requests.id", ondelete="CASCADE"))
+    author_id: Mapped[int | None] = mapped_column(ForeignKey("users.id"))
+    body: Mapped[str] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    request: Mapped[Request] = relationship(back_populates="comments")