fix issue 70

tests/test_saving_nullable_fields.py

@@ -0,0 +1,67 @@
+from typing import Optional
+
+import databases
+import sqlalchemy
+from sqlalchemy import create_engine
+
+import ormar
+import pytest
+
+from tests.settings import DATABASE_URL
+
+db = databases.Database(DATABASE_URL, force_rollback=True)
+metadata = sqlalchemy.MetaData()
+
+
+class PrimaryModel(ormar.Model):
+    class Meta:
+        metadata = metadata
+        database = db
+        tablename = "primary_models"
+
+    id: int = ormar.Integer(primary_key=True)
+    name: str = ormar.String(max_length=255, index=True)
+    some_text: str = ormar.Text()
+    # NOTE: Removing nullable=True makes the test pass.
+    some_other_text: Optional[str] = ormar.Text(nullable=True)
+
+
+class SecondaryModel(ormar.Model):
+    class Meta:
+        metadata = metadata
+        database = db
+        tablename = "secondary_models"
+
+    id: int = ormar.Integer(primary_key=True)
+    name: str = ormar.String(max_length=100)
+    primary_model: PrimaryModel = ormar.ForeignKey(
+        PrimaryModel, related_name="secondary_models",
+    )
+
+
+@pytest.fixture(autouse=True, scope="module")
+def create_test_database():
+    engine = create_engine(DATABASE_URL)
+    metadata.create_all(engine)
+    yield
+    metadata.drop_all(engine)
+
+
+@pytest.mark.asyncio
+async def test_create_models():
+    primary = await PrimaryModel(
+        name="Foo", some_text="Bar", some_other_text="Baz"
+    ).save()
+    assert primary.id == 1
+
+    secondary = await SecondaryModel(name="Foo", primary_model=primary).save()
+    assert secondary.id == 1
+    assert secondary.primary_model.id == 1
+
+
+@pytest.mark.asyncio
+async def test_update_secondary():
+    secondary = await SecondaryModel.objects.get(id=1)
+    assert secondary.name == "Foo"
+    await secondary.update(name="Updated")
+    assert secondary.name == "Updated"

tests/test_saving_related.py

@@ -55,7 +55,7 @@ async def test_model_relationship():
             assert ws.topic == "Topic 1"
             assert ws.category.name == "Foo"
 
-            ws.topic = 'Topic 2'
+            ws.topic = "Topic 2"
             await ws.update()
 
             assert ws.id == 1