version with pydantic inheritance passing all the tests

tests/test_fastapi_usage.py

@@ -0,0 +1,55 @@
+import databases
+import sqlalchemy
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+import ormar
+from tests.settings import DATABASE_URL
+
+app = FastAPI()
+
+database = databases.Database(DATABASE_URL, force_rollback=True)
+metadata = sqlalchemy.MetaData()
+
+
+class Category(ormar.Model):
+    class Meta:
+        tablename = "categories"
+        metadata = metadata
+        database = database
+
+    id: ormar.Integer(primary_key=True)
+    name: ormar.String(max_length=100)
+
+
+class Item(ormar.Model):
+    class Meta:
+        tablename = "items"
+        metadata = metadata
+        database = database
+
+    id: ormar.Integer(primary_key=True)
+    name: ormar.String(max_length=100)
+    category: ormar.ForeignKey(Category, nullable=True)
+
+
+@app.post("/items/", response_model=Item)
+async def create_item(item: Item):
+    return item
+
+
+client = TestClient(app)
+
+
+def test_read_main():
+    response = client.post(
+        "/items/", json={"name": "test", "id": 1, "category": {"name": "test cat"}}
+    )
+    assert response.status_code == 200
+    assert response.json() == {
+        "category": {"id": None, "name": "test cat"},
+        "id": 1,
+        "name": "test",
+    }
+    item = Item(**response.json())
+    assert item.id == 1