56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
from typing import Optional
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import databases
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import pytest
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import sqlalchemy
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import ormar
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from tests.settings import DATABASE_URL
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database = databases.Database(DATABASE_URL)
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metadata = sqlalchemy.MetaData()
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engine = sqlalchemy.create_engine(DATABASE_URL)
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class Artist(ormar.Model):
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class Meta:
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tablename = "artists"
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metadata = metadata
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database = database
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id: int = ormar.Integer(primary_key=True)
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name: str = ormar.String(max_length=100)
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class Album(ormar.Model):
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class Meta:
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tablename = "albums"
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metadata = metadata
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database = database
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id: int = ormar.Integer(primary_key=True)
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name: str = ormar.String(max_length=100)
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artist: Optional[Artist] = ormar.ForeignKey(Artist, ondelete="CASCADE")
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@pytest.fixture(autouse=True, scope="module")
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def create_test_database():
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metadata.drop_all(engine)
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metadata.create_all(engine)
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yield
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metadata.drop_all(engine)
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def test_simple_cascade():
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inspector = sqlalchemy.inspect(engine)
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columns = inspector.get_columns("albums")
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assert len(columns) == 3
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col_names = [col.get("name") for col in columns]
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assert sorted(["id", "name", "artist"]) == sorted(col_names)
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fks = inspector.get_foreign_keys("albums")
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assert len(fks) == 1
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assert fks[0]["name"] == "fk_albums_artists_id_artist"
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assert fks[0]["constrained_columns"][0] == "artist"
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assert fks[0]["referred_columns"][0] == "id"
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assert fks[0]["options"].get("ondelete") == "CASCADE"
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