feat: deal tags

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, DealGroup
+    from models import Status, Board, DealStatusHistory, DealGroup, DealTag
     from modules.clients.models import Client
 
 
@@ -41,6 +41,14 @@ class Deal(BaseModel, IdMixin, SoftDeleteMixin, CreatedAtMixin):
         lazy="noload", back_populates="deals"
     )
 
+    tags: Mapped[list["DealTag"]] = relationship(
+        secondary="deals_deal_tags",
+        back_populates="deals",
+        lazy="selectin",
+        primaryjoin="Deal.id == deals_deal_tags.c.deal_id",
+        secondaryjoin="and_(DealTag.id == deals_deal_tags.c.deal_tag_id, DealTag.is_deleted == False)",
+    )
+
     # module client
     client_id: Mapped[Optional[int]] = mapped_column(
         ForeignKey("clients.id", ondelete="CASCADE"),