fix: fix metadata only

src/ome_autogen/_config.py

@@ -14,6 +14,7 @@
     ("Instrument", f"{MIXIN_MODULE}._instrument.InstrumentMixin", False),
     ("Reference", f"{MIXIN_MODULE}._reference.ReferenceMixin", True),
     ("BinData", f"{MIXIN_MODULE}._bin_data.BinDataMixin", True),
+    ("Pixels", f"{MIXIN_MODULE}._pixels.PixelsMixin", True),
     (
         "StructuredAnnotations",
         f"{MIXIN_MODULE}._structured_annotations.StructuredAnnotationsMixin",

src/ome_types/_mixins/_pixels.py

@@ -0,0 +1,19 @@
+from pydantic import root_validator
+
+from ome_types._mixins._base_type import OMEType
+
+
+class PixelsMixin(OMEType):
+    @root_validator(pre=True)
+    def _validate_root(cls, values: dict) -> dict:
+        if "metadata_only" in values:
+            if isinstance(values["metadata_only"], bool):
+                if not values["metadata_only"]:
+                    values.pop("metadata_only")
+                else:
+                    # type ignore in case the autogeneration hasn't been built
+                    from ome_types.model import MetadataOnly  # type: ignore
+
+                    values["metadata_only"] = MetadataOnly()
+
+        return values

tests/test_model.py

@@ -228,3 +228,21 @@ def _sort_elements(element: ET.Element, recursive: bool = True) -> None:
         # Recursively sort child elements for each subelement
         for child in element:
             _sort_elements(child)
+
+
+@pytest.mark.parametrize("only", [True, False, {}, None])
+def test_metadata_only(only: bool) -> None:
+    pix = model.Pixels(
+        metadata_only=only,  # passing bool should be fine
+        size_c=1,
+        size_t=1,
+        size_x=1,
+        size_y=1,
+        size_z=1,
+        dimension_order="XYZCT",
+        type="uint8",
+    )
+    if only not in (False, None):  # note that empty dict is "truthy" for metadata_only
+        assert pix.metadata_only
+    else:
+        assert not pix.metadata_only