user collection model

app/models/session.py

@@ -2,7 +2,6 @@ from typing import List
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.models.task import Task
-from app.models.user import User
 from app.extensions import db
 
 class Session(db.Model):
@@ -10,7 +9,6 @@ class Session(db.Model):
     name: Mapped[str] = mapped_column(unique=True)
 
     authorized: Mapped[bool]
-    users: Mapped[List[User]] = relationship("User", cascade="all, delete-orphan", back_populates="session")
 
     tasks: Mapped[List[Task]] = relationship("Task", cascade="all, delete-orphan", back_populates="session")
 

app/models/task.py

@@ -13,6 +13,10 @@ class Task(db.Model):
 
     session_id = Column(Integer, ForeignKey("session.id"))
     session: Mapped['Session'] = relationship("Session", back_populates="tasks")
+    
+    collection_id = Column(Integer, ForeignKey("collection.id"))
+    collection: Mapped['UsersCollection'] = relationship('UsersCollection', back_populates='task')
+    
     datetime: Mapped[DateTime] = Column(DateTime, default=datetime.datetime.utcnow())
     status: Mapped[str]
     status_message: Mapped[str]

app/models/user.py

@@ -15,5 +15,5 @@ class User(db.Model):
     phone: Mapped[str] = mapped_column(nullable=True, unique=True)
     username: Mapped[str] = mapped_column(nullable=True, unique=True)
     
-    session_id = Column(Integer, ForeignKey("session.id"))
-    session: Mapped["Session"] = relationship("Session", back_populates="users") 
+    collection_id = Column(Integer, ForeignKey("collection.id"))
+    collection: Mapped["UsersCollection"] = relationship("UsersCollection", back_populates="users") 

app/models/user_collection.py

@@ -0,0 +1,13 @@
+from typing import List
+
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.extensions import db
+from app.models.task import Task
+from app.models.user import User
+
+class UsersCollection(db.Model):
+    id: Mapped[int] = mapped_column(primary_key=True)
+    
+    Mapped[List[Task]] = relationship("Task", back_populates="collection")
+    users: Mapped[List[User]] = relationship("User", cascade="all, delete-orphan", back_populates="collection")