Coverage for docs_src / tutorial / relationship_attributes / back_populates / tutorial002_py310.py: 100%

1from sqlmodel import Field, Relationship, Session, SQLModel, create_engine, select 8 ctx1ijklmnop

2 

3 

4class Team(SQLModel, table=True): 8 ctx1ijklmnop

5 id: int | None = Field(default=None, primary_key=True) 8 ctx1ijklmnop

6 name: str = Field(index=True) 8 ctx1ijklmnop

7 headquarters: str 8 ctx1ijklmnop

8 

9 heroes: list["Hero"] = Relationship(back_populates="team") 8 ctx1ijklmnop

10 

11 

12class Hero(SQLModel, table=True): 8 ctx1ijklmnop

13 id: int | None = Field(default=None, primary_key=True) 8 ctx1ijklmnop

14 name: str = Field(index=True) 8 ctx1ijklmnop

15 secret_name: str 8 ctx1ijklmnop

16 age: int | None = Field(default=None, index=True) 8 ctx1ijklmnop

17 

18 team_id: int | None = Field(default=None, foreign_key="team.id") 8 ctx1ijklmnop

19 team: Team | None = Relationship(back_populates="heroes") 8 ctx1ijklmnop

20 

21 

22sqlite_file_name = "database.db" 8 ctx1ijklmnop

23sqlite_url = f"sqlite:///{sqlite_file_name}" 8 ctx1ijklmnop

24 

25engine = create_engine(sqlite_url, echo=True) 8 ctx1ijklmnop

26 

27 

28def create_db_and_tables(): 8 ctx1ijklmnop

29 SQLModel.metadata.create_all(engine) 8 ctx1abcdefgh

30 

31 

32def create_heroes(): 8 ctx1ijklmnop

33 with Session(engine) as session: 8 ctx1abcdefgh

34 team_preventers = Team(name="Preventers", headquarters="Sharp Tower") 8 ctx1abcdefgh

35 team_z_force = Team(name="Z-Force", headquarters="Sister Margaret's Bar") 8 ctx1abcdefgh

36 

37 hero_deadpond = Hero( 8 ctx1abcdefgh

38 name="Deadpond", secret_name="Dive Wilson", team=team_z_force 

39 ) 

40 hero_rusty_man = Hero( 8 ctx1abcdefgh

41 name="Rusty-Man", secret_name="Tommy Sharp", age=48, team=team_preventers 

42 ) 

43 hero_spider_boy = Hero(name="Spider-Boy", secret_name="Pedro Parqueador") 8 ctx1abcdefgh

44 session.add(hero_deadpond) 8 ctx1abcdefgh

45 session.add(hero_rusty_man) 8 ctx1abcdefgh

46 session.add(hero_spider_boy) 8 ctx1abcdefgh

47 session.commit() 8 ctx1abcdefgh

48 

49 session.refresh(hero_deadpond) 8 ctx1abcdefgh

50 session.refresh(hero_rusty_man) 8 ctx1abcdefgh

51 session.refresh(hero_spider_boy) 8 ctx1abcdefgh

52 

53 print("Created hero:", hero_deadpond) 8 ctx1abcdefgh

54 print("Created hero:", hero_rusty_man) 8 ctx1abcdefgh

55 print("Created hero:", hero_spider_boy) 8 ctx1abcdefgh

56 

57 hero_spider_boy.team = team_preventers 8 ctx1abcdefgh

58 session.add(hero_spider_boy) 8 ctx1abcdefgh

59 session.commit() 8 ctx1abcdefgh

60 session.refresh(hero_spider_boy) 8 ctx1abcdefgh

61 print("Updated hero:", hero_spider_boy) 8 ctx1abcdefgh

62 

63 hero_black_lion = Hero(name="Black Lion", secret_name="Trevor Challa", age=35) 8 ctx1abcdefgh

64 hero_sure_e = Hero(name="Princess Sure-E", secret_name="Sure-E") 8 ctx1abcdefgh

65 team_wakaland = Team( 8 ctx1abcdefgh

66 name="Wakaland", 

67 headquarters="Wakaland Capital City", 

68 heroes=[hero_black_lion, hero_sure_e], 

69 ) 

70 session.add(team_wakaland) 8 ctx1abcdefgh

71 session.commit() 8 ctx1abcdefgh

72 session.refresh(team_wakaland) 8 ctx1abcdefgh

73 print("Team Wakaland:", team_wakaland) 8 ctx1abcdefgh

74 

75 hero_tarantula = Hero(name="Tarantula", secret_name="Natalia Roman-on", age=32) 8 ctx1abcdefgh

76 hero_dr_weird = Hero(name="Dr. Weird", secret_name="Steve Weird", age=36) 8 ctx1abcdefgh

77 hero_cap = Hero( 8 ctx1abcdefgh

78 name="Captain North America", secret_name="Esteban Rogelios", age=93 

79 ) 

80 

81 team_preventers.heroes.append(hero_tarantula) 8 ctx1abcdefgh

82 team_preventers.heroes.append(hero_dr_weird) 8 ctx1abcdefgh

83 team_preventers.heroes.append(hero_cap) 8 ctx1abcdefgh

84 session.add(team_preventers) 8 ctx1abcdefgh

85 session.commit() 8 ctx1abcdefgh

86 session.refresh(hero_tarantula) 8 ctx1abcdefgh

87 session.refresh(hero_dr_weird) 8 ctx1abcdefgh

88 session.refresh(hero_cap) 8 ctx1abcdefgh

89 print("Preventers new hero:", hero_tarantula) 8 ctx1abcdefgh

90 print("Preventers new hero:", hero_dr_weird) 8 ctx1abcdefgh

91 print("Preventers new hero:", hero_cap) 8 ctx1abcdefgh

92 

93 

94def select_heroes(): 8 ctx1ijklmnop

95 with Session(engine) as session: 8 ctx1abcdefgh

96 statement = select(Team).where(Team.name == "Preventers") 8 ctx1abcdefgh

97 result = session.exec(statement) 8 ctx1abcdefgh

98 team_preventers = result.one() 8 ctx1abcdefgh

99 

100 print("Preventers heroes:", team_preventers.heroes) 8 ctx1abcdefgh

101 

102 

103def update_heroes(): 8 ctx1ijklmnop

104 with Session(engine) as session: 8 ctx1abcdefgh

105 hero_spider_boy = session.exec( 8 ctx1abcdefgh

106 select(Hero).where(Hero.name == "Spider-Boy") 

107 ).one() 

108 

109 preventers_team = session.exec( 8 ctx1abcdefgh

110 select(Team).where(Team.name == "Preventers") 

111 ).one() 

112 

113 print("Hero Spider-Boy:", hero_spider_boy) 8 ctx1abcdefgh

114 print("Preventers Team:", preventers_team) 8 ctx1abcdefgh

115 print("Preventers Team Heroes:", preventers_team.heroes) 8 ctx1abcdefgh

116 

117 hero_spider_boy.team = None 8 ctx1abcdefgh

118 

119 print("Spider-Boy without team:", hero_spider_boy) 8 ctx1abcdefgh

120 

121 print("Preventers Team Heroes again:", preventers_team.heroes) 8 ctx1abcdefgh

122 

123 session.add(hero_spider_boy) 8 ctx1abcdefgh

124 session.commit() 8 ctx1abcdefgh

125 print("After committing") 8 ctx1abcdefgh

126 

127 session.refresh(hero_spider_boy) 8 ctx1abcdefgh

128 print("Spider-Boy after commit:", hero_spider_boy) 8 ctx1abcdefgh

129 

130 print("Preventers Team Heroes after commit:", preventers_team.heroes) 8 ctx1abcdefgh

131 

132 

133def main(): 8 ctx1ijklmnop

134 create_db_and_tables() 8 ctx1abcdefgh

135 create_heroes() 8 ctx1abcdefgh

136 select_heroes() 8 ctx1abcdefgh

137 update_heroes() 8 ctx1abcdefgh

138 

139 

140if __name__ == "__main__": 8 ctx1ijklmnop

141 main()