fix serializer

Author: giancarloromeo

packages/models-library/src/models_library/projects_nodes_io.py

@@ -13,6 +13,7 @@
 
 from models_library.basic_types import ConstrainedStr, KeyIDStr
 from pydantic import (
+    AfterValidator,
     AnyUrl,
     BaseModel,
     ConfigDict,
@@ -122,7 +123,9 @@ class PortLink(BaseModel):
 class DownloadLink(BaseModel):
     """I/O port type to hold a generic download link to a file (e.g. S3 pre-signed link, etc)"""
 
-    download_link: AnyUrl = Field(..., alias="downloadLink")
+    download_link: Annotated[AnyUrl, AfterValidator(str)] = Field(
+        ..., alias="downloadLink"
+    )
     label: str | None = Field(default=None, description="Display name")
     model_config = ConfigDict(
         extra="forbid",

packages/models-library/src/models_library/utils/nodes.py

@@ -5,7 +5,7 @@
 from copy import deepcopy
 from typing import Any
 
-from pydantic import BaseModel
+from pydantic import BaseModel, TypeAdapter
 
 from ..projects import Project
 from ..projects_nodes_io import NodeID, PortLink, UUIDStr
@@ -20,7 +20,7 @@ def project_node_io_payload_cb(
 
     async def node_io_payload_cb(node_id: NodeID) -> dict[str, Any]:
         node_io_payload: dict[str, Any] = {"inputs": None, "outputs": None}
-        node = project.workbench.get(UUIDStr(node_id))
+        node = project.workbench.get(TypeAdapter(UUIDStr).validate_python(node_id))
         if node:
             node_io_payload = {"inputs": node.inputs, "outputs": node.outputs}