Set response_model_exclude_unset=True for all.

app/routes/collections_page.py

@@ -159,20 +159,28 @@ def create_collection(collection_id: str = "", instance_id: str = "") -> dict:
     return isobaric_col.model_dump(exclude_none=True)
 
 
-@router.get("/collections/", response_model=Collections)
+@router.get(
+    "/collections/", response_model=Collections, response_model_exclude_unset=True
+)
 async def get_collections_page() -> dict:
     """List collections as JSON. Isobaric is the only one available. No data is returned, only info about the collection."""
     return create_collection()
 
 
-@router.get("/collections/{collection_id}/", response_model=Collection)
+@router.get(
+    "/collections/{collection_id}/",
+    response_model=Collection,
+    response_model_exclude_unset=True,
+)
 async def get_collection_page(collection_id: CollectionID) -> dict:
     """List a specific collection as JSON. Isobaric is the only one available. No data is returned, only info about the collection.."""
     return create_collection(collection_id)
 
 
 @router.get(
-    "/collections/{collection_id}/instances/{instance_id}/", response_model=Collection
+    "/collections/{collection_id}/instances/{instance_id}/",
+    response_model=Collection,
+    response_model_exclude_unset=True,
 )
 async def get_instance_collection_page(
     collection_id: CollectionID,

app/routes/conformance_page.py

@@ -22,7 +22,9 @@ def create_conformance_page() -> dict:
 router = APIRouter()
 
 
-@router.get("/conformance/", response_model=ConformanceModel)
-async def get_conformance_page():
+@router.get(
+    "/conformance/", response_model=ConformanceModel, response_model_exclude_unset=True
+)
+async def get_conformance_page() -> dict:
     """Returns the conformance page as JSON."""
     return create_conformance_page()

app/routes/instances_page.py

@@ -123,7 +123,11 @@ def create_instances() -> dict:
     return isobaric_inst.model_dump(exclude_none=True)
 
 
-@router.get("/collections/isobaric/instances/", response_model=Instances)
+@router.get(
+    "/collections/isobaric/instances/",
+    response_model=Instances,
+    response_model_exclude_unset=True,
+)
 async def get_isobaric_instances_page() -> dict:
     """Return list of available instances as JSON."""
     return create_instances()

app/routes/landing_page.py

@@ -54,7 +54,7 @@ def create_landing_page(base_url) -> dict:
 router = APIRouter()
 
 
-@router.get("/", response_model=LandingPageModel)
-async def get_landing_page():
+@router.get("/", response_model=LandingPageModel, response_model_exclude_unset=True)
+async def get_landing_page() -> dict:
     """Returns the landing page as JSON."""
     return create_landing_page(base_url=BASE_URL)

app/routes/position_page.py

@@ -253,7 +253,11 @@ def check_coords_within_bounds(ds: xr.Dataset, point: Point) -> Tuple[bool, dict
     return True, {}
 
 
-@router.get("/collections/isobaric/position/", response_model=Coverage)
+@router.get(
+    "/collections/isobaric/position/",
+    response_model=Coverage,
+    response_model_exclude_unset=True,
+)
 async def get_isobaric_page(
     request: Request,
     coords: Annotated[
@@ -290,7 +294,9 @@ async def get_isobaric_page(
 
 
 @router.get(
-    "/collections/isobaric/instances/{instance_id}/position", response_model=Coverage
+    "/collections/isobaric/instances/{instance_id}/position",
+    response_model=Coverage,
+    response_model_exclude_unset=True,
 )
 async def get_instance_isobaric_page(
     request: Request,

app/test_app.py

@@ -18,9 +18,8 @@ def test_landingpage(self) -> None:
     def test_conformance(self) -> None:
         response = client.get("/conformance")
         self.assertEqual(response.status_code, 200)
-        self.assertIn(
-            '{"conformsTo":["http://www.opengis.net/spec/ogcapi-common-1/1.0/conf/core",',
-            response.text,
+        self.assertTrue(
+            "http://www.opengis.net/spec/ogcapi-edr-1/1.0/conf/core" in response.text,
         )
 
     def test_collections(self) -> None: