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from typing import Optional
import ormar
import pytest
import sqlalchemy
from ormar.fields.foreign_key import validate_referential_action
from tests.lifespan import init_tests
from tests.settings import create_config
base_ormar_config = create_config()
class Artist(ormar.Model):
ormar_config = base_ormar_config.copy(tablename="artists")
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=100)
class Album(ormar.Model):
ormar_config = base_ormar_config.copy(tablename="albums")
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=100)
artist: Optional[Artist] = ormar.ForeignKey(Artist, ondelete="CASCADE")
class A(ormar.Model):
ormar_config = base_ormar_config.copy()
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=64, nullalbe=False)
class B(ormar.Model):
ormar_config = base_ormar_config.copy()
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=64, nullalbe=False)
a: A = ormar.ForeignKey(to=A, ondelete=ormar.ReferentialAction.CASCADE)
class C(ormar.Model):
ormar_config = base_ormar_config.copy()
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=64, nullalbe=False)
b: B = ormar.ForeignKey(to=B, ondelete=ormar.ReferentialAction.CASCADE)
create_test_database = init_tests(base_ormar_config)
def test_simple_cascade():
inspector = sqlalchemy.inspect(base_ormar_config.engine)
columns = inspector.get_columns("albums")
assert len(columns) == 3
col_names = [col.get("name") for col in columns]
assert sorted(["id", "name", "artist"]) == sorted(col_names)
fks = inspector.get_foreign_keys("albums")
assert len(fks) == 1
assert fks[0]["name"] == "fk_albums_artists_id_artist"
assert fks[0]["constrained_columns"][0] == "artist"
assert fks[0]["referred_columns"][0] == "id"
assert fks[0]["options"].get("ondelete") == "CASCADE"
def test_validations_referential_action():
CASCADE = ormar.ReferentialAction.CASCADE.value
assert validate_referential_action(None) is None
assert validate_referential_action("cascade") == CASCADE
assert validate_referential_action(ormar.ReferentialAction.CASCADE) == CASCADE
with pytest.raises(ormar.ModelDefinitionError):
validate_referential_action("NOT VALID")
@pytest.mark.asyncio
async def test_cascade_clear():
async with base_ormar_config.database:
async with base_ormar_config.database.transaction(force_rollback=True):
a = await A.objects.create(name="a")
b = await B.objects.create(name="b", a=a)
await C.objects.create(name="c", b=b)
await a.bs.clear(keep_reversed=False)
assert await B.objects.count() == 0
assert await C.objects.count() == 0
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