Coverage for docs_src/tutorial/relationship_attributes/read_relationships/tutorial002_py39.py: 100%

1from typing import Optional 4 ctx1abcd

2 

3from sqlmodel import Field, Relationship, Session, SQLModel, create_engine, select 4 ctx1abcd

4 

5 

6class Team(SQLModel, table=True): 4 ctx1abcd

7 id: Optional[int] = Field(default=None, primary_key=True) 4 ctx1abcd

8 name: str = Field(index=True) 4 ctx1abcd

9 headquarters: str 4 ctx1abcd

10 

11 heroes: list["Hero"] = Relationship(back_populates="team") 4 ctx1abcd

12 

13 

14class Hero(SQLModel, table=True): 4 ctx1abcd

15 id: Optional[int] = Field(default=None, primary_key=True) 4 ctx1abcd

16 name: str = Field(index=True) 4 ctx1abcd

17 secret_name: str 4 ctx1abcd

18 age: Optional[int] = Field(default=None, index=True) 4 ctx1abcd

19 

20 team_id: Optional[int] = Field(default=None, foreign_key="team.id") 4 ctx1abcd

21 team: Optional[Team] = Relationship(back_populates="heroes") 4 ctx1abcd

22 

23 

24sqlite_file_name = "database.db" 4 ctx1abcd

25sqlite_url = f"sqlite:///{sqlite_file_name}" 4 ctx1abcd

26 

27engine = create_engine(sqlite_url, echo=True) 4 ctx1abcd

28 

29 

30def create_db_and_tables(): 4 ctx1abcd

31 SQLModel.metadata.create_all(engine) 4 ctx1abcd

32 

33 

34def create_heroes(): 4 ctx1abcd

35 with Session(engine) as session: 4 ctx1abcd

36 team_preventers = Team(name="Preventers", headquarters="Sharp Tower") 4 ctx1abcd

37 team_z_force = Team(name="Z-Force", headquarters="Sister Margaret's Bar") 4 ctx1abcd

38 

39 hero_deadpond = Hero( 4 ctx1abcd

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

41 ) 

42 hero_rusty_man = Hero( 4 ctx1abcd

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

44 ) 

45 hero_spider_boy = Hero(name="Spider-Boy", secret_name="Pedro Parqueador") 4 ctx1abcd

46 session.add(hero_deadpond) 4 ctx1abcd

47 session.add(hero_rusty_man) 4 ctx1abcd

48 session.add(hero_spider_boy) 4 ctx1abcd

49 session.commit() 4 ctx1abcd

50 

51 session.refresh(hero_deadpond) 4 ctx1abcd

52 session.refresh(hero_rusty_man) 4 ctx1abcd

53 session.refresh(hero_spider_boy) 4 ctx1abcd

54 

55 print("Created hero:", hero_deadpond) 4 ctx1abcd

56 print("Created hero:", hero_rusty_man) 4 ctx1abcd

57 print("Created hero:", hero_spider_boy) 4 ctx1abcd

58 

59 hero_spider_boy.team = team_preventers 4 ctx1abcd

60 session.add(hero_spider_boy) 4 ctx1abcd

61 session.commit() 4 ctx1abcd

62 session.refresh(hero_spider_boy) 4 ctx1abcd

63 print("Updated hero:", hero_spider_boy) 4 ctx1abcd

64 

65 hero_black_lion = Hero(name="Black Lion", secret_name="Trevor Challa", age=35) 4 ctx1abcd

66 hero_sure_e = Hero(name="Princess Sure-E", secret_name="Sure-E") 4 ctx1abcd

67 team_wakaland = Team( 4 ctx1abcd

68 name="Wakaland", 

69 headquarters="Wakaland Capital City", 

70 heroes=[hero_black_lion, hero_sure_e], 

71 ) 

72 session.add(team_wakaland) 4 ctx1abcd

73 session.commit() 4 ctx1abcd

74 session.refresh(team_wakaland) 4 ctx1abcd

75 print("Team Wakaland:", team_wakaland) 4 ctx1abcd

76 

77 hero_tarantula = Hero(name="Tarantula", secret_name="Natalia Roman-on", age=32) 4 ctx1abcd

78 hero_dr_weird = Hero(name="Dr. Weird", secret_name="Steve Weird", age=36) 4 ctx1abcd

79 hero_cap = Hero( 4 ctx1abcd

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

81 ) 

82 

83 team_preventers.heroes.append(hero_tarantula) 4 ctx1abcd

84 team_preventers.heroes.append(hero_dr_weird) 4 ctx1abcd

85 team_preventers.heroes.append(hero_cap) 4 ctx1abcd

86 session.add(team_preventers) 4 ctx1abcd

87 session.commit() 4 ctx1abcd

88 session.refresh(hero_tarantula) 4 ctx1abcd

89 session.refresh(hero_dr_weird) 4 ctx1abcd

90 session.refresh(hero_cap) 4 ctx1abcd

91 print("Preventers new hero:", hero_tarantula) 4 ctx1abcd

92 print("Preventers new hero:", hero_dr_weird) 4 ctx1abcd

93 print("Preventers new hero:", hero_cap) 4 ctx1abcd

94 

95 

96def select_heroes(): 4 ctx1abcd

97 with Session(engine) as session: 4 ctx1abcd

98 statement = select(Team).where(Team.name == "Preventers") 4 ctx1abcd

99 result = session.exec(statement) 4 ctx1abcd

100 team_preventers = result.one() 4 ctx1abcd

101 

102 print("Preventers heroes:", team_preventers.heroes) 4 ctx1abcd

103 

104 

105def update_heroes(): 4 ctx1abcd

106 with Session(engine) as session: 4 ctx1abcd

107 statement = select(Hero).where(Hero.name == "Spider-Boy") 4 ctx1abcd

108 result = session.exec(statement) 4 ctx1abcd

109 hero_spider_boy = result.one() 4 ctx1abcd

110 

111 hero_spider_boy.team = None 4 ctx1abcd

112 session.add(hero_spider_boy) 4 ctx1abcd

113 session.commit() 4 ctx1abcd

114 

115 session.refresh(hero_spider_boy) 4 ctx1abcd

116 print("Spider-Boy without team:", hero_spider_boy) 4 ctx1abcd

117 

118 

119def main(): 4 ctx1abcd

120 create_db_and_tables() 4 ctx1abcd

121 create_heroes() 4 ctx1abcd

122 select_heroes() 4 ctx1abcd

123 update_heroes() 4 ctx1abcd

124 

125 

126if __name__ == "__main__": 4 ctx1abcd

127 main()