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

backend/app/models/task.py

@@ -0,0 +1,47 @@
+"""Модели задач (трекера)."""
+from datetime import date, datetime
+
+from sqlalchemy import Date, DateTime, ForeignKey, String, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db.session import Base
+from app.models.enums import RoleCode, TaskPriority, TaskStatus
+from app.models.types import enum_col
+
+
+class Task(Base):
+    __tablename__ = "tasks"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    title: Mapped[str] = mapped_column(String(300))
+    description: Mapped[str | None] = mapped_column(Text)
+    due_date: Mapped[date | None] = mapped_column(Date)
+    priority: Mapped[TaskPriority] = mapped_column(
+        enum_col(TaskPriority), default=TaskPriority.MEDIUM
+    )
+    status: Mapped[TaskStatus] = mapped_column(
+        enum_col(TaskStatus), default=TaskStatus.NEW
+    )
+    region_id: Mapped[int | None] = mapped_column(ForeignKey("regions.id"))
+    assignee_user_id: Mapped[int | None] = mapped_column(ForeignKey("users.id"))
+    assignee_role: Mapped[RoleCode | None] = mapped_column(enum_col(RoleCode))
+    created_by: Mapped[int | None] = mapped_column(ForeignKey("users.id"))
+    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    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["TaskComment"]] = relationship(back_populates="task")
+
+
+class TaskComment(Base):
+    __tablename__ = "task_comments"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    task_id: Mapped[int] = mapped_column(ForeignKey("tasks.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())
+
+    task: Mapped[Task] = relationship(back_populates="comments")