feat: groups

models/deal.py

@@ -7,7 +7,7 @@ from models.base import BaseModel
 from models.mixins import SoftDeleteMixin, CreatedAtMixin, IdMixin
 
 if TYPE_CHECKING:
-    from models import Status, Board, DealStatusHistory
+    from models import Status, Board, DealStatusHistory, DealGroup
     from modules.clients.models import Client
 
 
@@ -34,6 +34,13 @@ class Deal(BaseModel, IdMixin, SoftDeleteMixin, CreatedAtMixin):
         lazy="noload",
     )
 
+    group_id: Mapped[Optional[int]] = mapped_column(
+        ForeignKey("deal_groups.id"), default=None, server_default=None
+    )
+    group: Mapped[Optional["DealGroup"]] = relationship(
+        lazy="noload", back_populates="deals"
+    )
+
     # module client
     client_id: Mapped[Optional[int]] = mapped_column(
         ForeignKey("clients.id", ondelete="CASCADE"),