crud for collections

items/models.py

@@ -70,10 +70,9 @@ class Items(Base):
     item_score: Mapped[float] = mapped_column(Float, default=0.0)
 
     # ilişkiler 
-    collections : Mapped['CollectionsDB']= relationship(
+    collections : Mapped[list['CollectionsDB']]= relationship(
         "CollectionsDB",
         secondary=collection_item,
         back_populates="items", 
         lazy='select'
     )  #back_populates karşı tarafın ismi
-