feat: projects and boards

models/board.py

@@ -0,0 +1,31 @@
+from datetime import datetime
+from typing import TYPE_CHECKING
+
+from sqlalchemy import ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from models import BaseModel
+
+if TYPE_CHECKING:
+    from models import Project, DealStatus, Deal
+
+
+class Board(BaseModel):
+    __tablename__ = "boards"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(nullable=False)
+    created_at: Mapped[datetime] = mapped_column(nullable=False)
+    is_deleted: Mapped[bool] = mapped_column(default=False)
+    ordinal_number: Mapped[int] = mapped_column(nullable=False)
+
+    project_id: Mapped[int] = mapped_column(ForeignKey('projects.id'), nullable=False)
+    project: Mapped["Project"] = relationship(
+        "Project",
+        back_populates="boards",
+        lazy="selectin",
+    )
+
+    deal_statuses: Mapped[list["DealStatus"]] = relationship("DealStatus", back_populates="board", lazy="selectin", cascade="all,delete")
+
+    deals: Mapped[list["Deal"]] = relationship("Deal", uselist=True, back_populates="board", lazy="selectin")