1"""LICENSE 

2Copyright 2020 Hermann Krumrey <hermann@krumreyh.com> 

3 

4This file is part of jerrycan. 

5 

6jerrycan is free software: you can redistribute it and/or modify 

7it under the terms of the GNU General Public License as published by 

8the Free Software Foundation, either version 3 of the License, or 

9(at your option) any later version. 

10 

11jerrycan is distributed in the hope that it will be useful, 

12but WITHOUT ANY WARRANTY; without even the implied warranty of 

13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

14GNU General Public License for more details. 

15 

16You should have received a copy of the GNU General Public License 

17along with jerrycan. If not, see <http://www.gnu.org/licenses/>. 

18LICENSE""" 

19 

20from jerrycan.base import db 

21from jerrycan.db.ModelMixin import ModelMixin 

22 

23 

24class IDModelMixin(ModelMixin): 

25 """ 

26 A mixin class that specifies a couple of methods all database 

27 models should implement. 

28 Includes an automatically incrementing ID. 

29 """ 

30 

31 id = db.Column( 

32 db.Integer, primary_key=True, nullable=False, autoincrement=True 

33 ) 

34 """ 

35 The ID is the primary key of the table and increments automatically 

36 """ 

37 

38 def __hash__(self) -> int: 

39 """ 

40 Creates a hash so that the model objects can be used as keys 

41 :return: None 

42 """ 

43 return hash(self.id)