change select query to delete query

Author: setiawanisasi

casbin_databases_adapter/adapter.py

@@ -71,7 +71,7 @@ async def remove_policy(self, sec, p_type, rule):
 
     @to_sync()
     async def remove_filtered_policy(self, sec, ptype, field_index, *field_values):
-        query = self.table.select().where(self.table.columns.ptype == ptype)
+        query = self.table.delete().where(self.table.columns.ptype == ptype)
         if not (0 <= field_index <= 5):
             return False
         if not (1 <= field_index + len(field_values) <= 6):
@@ -80,7 +80,7 @@ async def remove_filtered_policy(self, sec, ptype, field_index, *field_values):
             if len(value) > 0:
                 query = query.where(self.table.columns[f"v{field_index+1}"] == value)
         result = await self.db.execute(query)
-        return True if result > 0 else False
+        return True if result else False
 
     @to_sync()
     async def load_filtered_policy(self, model: Model, filter_: Filter) -> None: