1from sqlalchemy.ext.hybrid import hybrid_property 

2from sqlalchemy.orm.session import object_session 

3from sqlalchemy import event 

4 

5from src import db 

6from .event import SerieAddedEvent, SerieDeletedEvent, ChangedEvent 

7 

8SerieAdditionalGenresModel = db.Table("serie_additional_genres", 

9 db.Column("serie_id", db.Integer, db.ForeignKey( 

10 "serie_additional.serie_id"), primary_key=True), 

11 db.Column("genre_id", db.Integer, db.ForeignKey( 

12 "genre.genre_id"), primary_key=True) 

13 ) 

14 

15 

16class SerieModel(db.Model): 

17 """ 

18 Serie Model for storing serie related details 

19 """ 

20 __tablename__ = "serie" 

21 

22 content_id = db.Column( 

23 db.Integer, 

24 db.ForeignKey('content.content_id', ondelete="CASCADE"), 

25 primary_key=True, index=True) 

26 imdbid = db.Column(db.String(255)) 

27 title = db.Column(db.String(255), index=True) 

28 start_year = db.Column(db.Integer) 

29 end_year = db.Column(db.Integer) 

30 writers = db.Column(db.Text) 

31 directors = db.Column(db.Text) 

32 actors = db.Column(db.Text) 

33 cover = db.Column(db.Text) 

34 plot_outline = db.Column(db.Text) 

35 

36 episodes = db.relationship( 

37 "EpisodeModel", backref="serie", lazy="dynamic") 

38 

39 content = db.relationship( 

40 "ContentModel", backref=db.backref("serie", uselist=False)) 

41 

42 @hybrid_property 

43 def serie_id(self): 

44 return self.content_id 

45 

46 

47class SerieAdditionalModel(db.Model): 

48 """ 

49 Serie Model for storing serie related details added by a user 

50 """ 

51 __tablename__ = "serie_additional" 

52 

53 serie_id = db.Column(db.Integer, index=True, primary_key=True) 

54 imdbid = db.Column(db.String(255)) 

55 title = db.Column(db.String(255), index=True) 

56 start_year = db.Column(db.Integer) 

57 end_year = db.Column(db.Integer) 

58 writers = db.Column(db.Text) 

59 directors = db.Column(db.Text) 

60 actors = db.Column(db.Text) 

61 cover = db.Column(db.Text) 

62 plot_outline = db.Column(db.Text) 

63 

64 episodes = db.relationship( 

65 "EpisodeAdditionalModel", backref="serie", lazy="dynamic") 

66 

67 genres = db.relationship( 

68 "GenreModel", secondary=SerieAdditionalGenresModel, lazy="dynamic") 

69 

70 

71@event.listens_for(SerieModel, 'after_insert') 

72def receive_after_insert(mapper, connection, target): 

73 "listen for the 'after_insert' event" 

74 connection.execute(SerieAddedEvent.insert(target)) 

75 

76 

77@event.listens_for(SerieModel, 'after_delete') 

78def receive_after_delete(mapper, connection, target): 

79 "listen for the 'after_delete' event" 

80 event = SerieDeletedEvent(object_id=target.content_id) 

81 connection.execute(event.delete()) 

82 

83 

84@event.listens_for(SerieModel, 'after_update') 

85def receive_after_update(mapper, connection, target): 

86 "listen for the 'after_update' event" 

87 if not object_session(target).is_modified(target, include_collections=False): 

88 return 

89 

90 changes = {} 

91 for attr in db.inspect(target).attrs: 

92 hist = attr.load_history() 

93 

94 if not hist.has_changes(): 

95 continue 

96 

97 # hist.deleted holds old value 

98 # hist.added holds new value 

99 connection.execute(ChangedEvent.__table__.insert().values( 

100 object_id=target.content_id, 

101 model_name=SerieModel.__tablename__, 

102 attribute_name=attr.key, 

103 new_value=str(hist.added[0]) 

104 ))