add charge for crud

Author: surajit

crud/charge.py

@@ -0,0 +1,18 @@
+import sqlalchemy.exc
+from sqlalchemy.orm import Session
+
+from models import payment
+
+class ChargeExistException(Exception):
+    pass
+
+
+async def add_charge(db: Session, charge):
+    try:
+        db_item = payment.Charge(**charge)
+        db.add(db_item)
+        db.commit()
+        db.refresh(db_item)
+    except sqlalchemy.exc.IntegrityError as exc:
+        raise ChargeExistException(exc)
+    return db_item