init commit

backend/app/models/links.py

@@ -0,0 +1,24 @@
+import uuid
+
+from sqlalchemy import BigInteger
+from sqlalchemy import Column
+from sqlalchemy import ForeignKey
+import sqlmodel
+
+
+class EventUserLink(sqlmodel.SQLModel, table=True):
+    event_id: uuid.UUID | None = sqlmodel.Field(
+        default=None, foreign_key='event.id', primary_key=True
+    )
+    user_id: int | None = sqlmodel.Field(
+        sa_column=Column(BigInteger(), ForeignKey('user.id'), primary_key=True)
+    )
+
+
+class ItemUserLink(sqlmodel.SQLModel, table=True):
+    item_id: uuid.UUID | None = sqlmodel.Field(
+        default=None, foreign_key='item.id', primary_key=True
+    )
+    user_id: int | None = sqlmodel.Field(
+        sa_column=Column(BigInteger(), ForeignKey('user.id'), primary_key=True)
+    )