Fix packaging with weights format priority

README.md

@@ -89,6 +89,10 @@ Made with [contrib.rocks](https://contrib.rocks).
 
 ### bioimageio.spec Python package
 
+#### bioimageio.spec 0.5.2post1
+
+* fix model packaging with weights format priority
+
 #### bioimageio.spec 0.5.2
 
 * new patch version model 0.5.2

bioimageio/spec/VERSION

@@ -1,3 +1,3 @@
 {
-    "version": "0.5.2"
+    "version": "0.5.2post1"
 }

bioimageio/spec/_internal/common_nodes.py

@@ -68,7 +68,7 @@ class StringNode(collections.UserString, ABC):
     _node_class: Type[Node]
     _node: Optional[Node] = None
 
-    def __init__(self: Self, seq: object) -> None:
+    def __init__(self, seq: object) -> None:
         super().__init__(seq)
         type_hints = {
             fn: t

bioimageio/spec/_internal/packaging_context.py

@@ -2,7 +2,7 @@
 
 from contextvars import ContextVar, Token
 from dataclasses import dataclass, field
-from typing import Dict, List, Optional, Union
+from typing import Dict, List, Literal, Optional, Sequence, Union
 
 from .io_basics import AbsoluteFilePath, FileName
 from .url import HttpUrl
@@ -16,16 +16,20 @@ class PackagingContext:
 
     bioimageio_yaml_file_name: FileName
 
-    file_sources: Dict[FileName, Union[AbsoluteFilePath, HttpUrl]] = field(
-        default_factory=dict
-    )
+    file_sources: Dict[FileName, Union[AbsoluteFilePath, HttpUrl]]
     """File sources to include in the packaged resource"""
 
+    weights_priority_order: Optional[Sequence[str]] = None
+    """set to select a single weights entry when packaging model resources"""
+
     def replace(
         self,
         *,
         bioimageio_yaml_file_name: Optional[FileName] = None,
         file_sources: Optional[Dict[FileName, Union[AbsoluteFilePath, HttpUrl]]] = None,
+        weights_priority_order: Union[
+            Optional[Sequence[str]], Literal["unchanged"]
+        ] = "unchanged",
     ) -> "PackagingContext":
         """return a modiefied copy"""
         return PackagingContext(
@@ -37,6 +41,11 @@ def replace(
             file_sources=(
                 dict(self.file_sources) if file_sources is None else file_sources
             ),
+            weights_priority_order=(
+                self.weights_priority_order
+                if weights_priority_order == "unchanged"
+                else weights_priority_order
+            ),
         )
 
     def __enter__(self):

bioimageio/spec/_package.py

@@ -25,9 +25,7 @@
 from ._internal.validation_context import validation_context_var
 from ._internal.warning_levels import ERROR
 from ._io import load_description
-from .model.v0_4 import ModelDescr as ModelDescr04
 from .model.v0_4 import WeightsFormat
-from .model.v0_5 import ModelDescr as ModelDescr05
 
 
 def get_os_friendly_file_name(name: str) -> str:
@@ -59,50 +57,16 @@ def get_resource_package_content(
     )
     content: Dict[FileName, Union[HttpUrl, AbsoluteFilePath]] = {}
     with PackagingContext(
-        bioimageio_yaml_file_name=bioimageio_yaml_file_name, file_sources=content
+        bioimageio_yaml_file_name=bioimageio_yaml_file_name,
+        file_sources=content,
+        weights_priority_order=weights_priority_order,
     ):
         rdf_content: BioimageioYamlContent = rd.model_dump(
             mode="json", exclude_unset=True
         )
 
     _ = rdf_content.pop("rdf_source", None)
 
-    if weights_priority_order is not None and isinstance(
-        rd, (ModelDescr04, ModelDescr05)
-    ):
-        # select single weights entry
-        assert isinstance(rdf_content["weights"], dict), type(rdf_content["weights"])
-        for wf in weights_priority_order:
-            w = rdf_content["weights"].get(wf)
-            if w is not None:
-                break
-        else:
-            raise ValueError(
-                "None of the weight formats in `weights_priority_order` is present in"
-                + " the given model."
-            )
-
-        assert isinstance(w, dict), type(w)
-        _ = w.pop("parent", None)
-        rdf_content["weights"] = {wf: w}
-        parent = rdf_content.pop("id", None)
-        parent_version = rdf_content.pop("version", None)
-        if parent is not None:
-            rdf_content["parent"] = {"id": parent, "version": parent_version}
-
-        with validation_context_var.get().replace(
-            root=rd.root, file_name=bioimageio_yaml_file_name
-        ):
-            rd_slim = build_description(rdf_content)
-
-        assert not isinstance(
-            rd_slim, InvalidDescr
-        ), rd_slim.validation_summary.format()
-        # repackage without other weights entries
-        return get_resource_package_content(
-            rd_slim, bioimageio_yaml_file_name=bioimageio_yaml_file_name
-        )
-
     return {**content, bioimageio_yaml_file_name: rdf_content}
 
 

bioimageio/spec/model/v0_4.py

@@ -21,8 +21,11 @@
     AllowInfNan,
     Discriminator,
     Field,
+    SerializationInfo,
+    SerializerFunctionWrapHandler,
     TypeAdapter,
     ValidationInfo,
+    WrapSerializer,
     field_validator,
     model_validator,
 )
@@ -46,6 +49,7 @@
 from .._internal.io import FileDescr as FileDescr
 from .._internal.io import Sha256 as Sha256
 from .._internal.io_basics import AbsoluteFilePath as AbsoluteFilePath
+from .._internal.packaging_context import packaging_context_var
 from .._internal.types import Datetime as Datetime
 from .._internal.types import Identifier as Identifier
 from .._internal.types import ImportantFileSource, LowerCaseIdentifier
@@ -870,6 +874,37 @@ class LinkedModel(Node):
     """version number (n-th published version, not the semantic version) of linked model"""
 
 
+def package_weights(
+    value: Node,
+    handler: SerializerFunctionWrapHandler,
+    info: SerializationInfo,
+):
+    ctxt = packaging_context_var.get()
+    if ctxt is not None and ctxt.weights_priority_order is not None:
+        for wf in ctxt.weights_priority_order:
+            w = getattr(value, wf, None)
+            if w is not None:
+                break
+        else:
+            raise ValueError(
+                "None of the weight formats in `weights_priority_order`"
+                + f" ({ctxt.weights_priority_order}) is present in the given model."
+            )
+
+        # remove links to parent entry (otherwise we cannot remove the parent)
+        for _, w in value:
+            if w is not None:
+                w.parent = None
+
+        for field_name in value.model_fields:
+            if field_name != wf:
+                setattr(value, field_name, None)
+
+    return handler(
+        value, info  # pyright: ignore[reportArgumentType]  # taken from pydantic docs
+    )
+
+
 class ModelDescr(GenericModelDescrBase, title="bioimage.io model specification"):
     """Specification of the fields used in a bioimage.io-compliant RDF that describes AI models with pretrained weights.
 
@@ -888,7 +923,9 @@ class ModelDescr(GenericModelDescrBase, title="bioimage.io model specification")
     id: Optional[ModelId] = None
     """Model zoo (bioimage.io) wide, unique identifier (assigned by bioimage.io)"""
 
-    authors: NotEmpty[List[Author]]
+    authors: NotEmpty[  # pyright: ignore[reportGeneralTypeIssues]  # make mandatory
+        List[Author]
+    ]
     """The authors are the creators of the model RDF and the primary points of contact."""
 
     documentation: Annotated[
@@ -1114,7 +1151,7 @@ def ignore_url_parent(cls, parent: Any):
     training_data: Union[LinkedDataset, DatasetDescr, None] = None
     """The dataset used to train this model"""
 
-    weights: WeightsDescr
+    weights: Annotated[WeightsDescr, WrapSerializer(package_weights)]
     """The weights for this model.
     Weights can be given for different formats, but should otherwise be equivalent.
     The available weight formats determine which consumers can use this model."""

bioimageio/spec/model/v0_5.py

@@ -43,6 +43,7 @@
     RootModel,
     Tag,
     ValidationInfo,
+    WrapSerializer,
     field_validator,
     model_validator,
 )
@@ -123,6 +124,7 @@
 from .v0_4 import TensorName as _TensorName_v0_4
 from .v0_4 import WeightsFormat as WeightsFormat
 from .v0_4 import ZeroMeanUnitVarianceDescr as _ZeroMeanUnitVarianceDescr_v0_4
+from .v0_4 import package_weights
 
 # unit names from https://ngff.openmicroscopy.org/latest/#axes-md
 SpaceUnit = Literal[
@@ -2342,7 +2344,7 @@ def _validate_output_axes(
     training_data: Union[None, LinkedDataset, DatasetDescr] = None
     """The dataset used to train this model"""
 
-    weights: WeightsDescr
+    weights: Annotated[WeightsDescr, WrapSerializer(package_weights)]
     """The weights for this model.
     Weights can be given for different formats, but should otherwise be equivalent.
     The available weight formats determine which consumers can use this model."""