1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
import asyncio
from typing import Optional
import databases
import ormar
import sqlalchemy
from examples import create_drop_database
DATABASE_URL = "sqlite:///test.db"
ormar_base_config = ormar.OrmarConfig(
database=databases.Database(DATABASE_URL), metadata=sqlalchemy.MetaData()
)
class Department(ormar.Model):
ormar_config = ormar_base_config.copy(tablename="departments")
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=100)
class Course(ormar.Model):
ormar_config = ormar_base_config.copy()
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=100)
completed: bool = ormar.Boolean(default=False)
department: Optional[Department] = ormar.ForeignKey(Department)
@create_drop_database(base_config=ormar_base_config)
async def verify():
department = await Department(name="Science").save()
course = Course(name="Math", completed=False, department=department)
print(department.courses[0])
# Will produce:
# Course(id=None,
# name='Math',
# completed=False,
# department=Department(id=None, name='Science'))
await course.save()
asyncio.run(verify())
|
