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xSAVIKx avatar xSAVIKx commented on June 26, 2024

that's kinda the "default" behavior, but sure, let's wait for a PR 👍

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hozn avatar hozn commented on June 26, 2024

I'm having this issue as well, but in pydantic v2. It works fine in vanilla pydantic, but does not work with the CloudEvent -- or subclasses, as I am using.

In my specific case, I have a Generic subclass for our models.

import uuid
from typing import Generic, TypeVar

from cloudevents.pydantic.v2 import CloudEvent
from pydantic import BaseModel

T = TypeVar("T", bound=BaseModel)


class MyEntity(BaseModel):
    id: uuid.UUID


class MyCloudEvent(CloudEvent, Generic[T]):
    data: T


if __name__ == "__main__":
    obj = MyEntity(id=uuid.uuid4())

    evt = MyCloudEvent(
        id=str(uuid.uuid4()),
        source="urn:source",
        subject="subject",
        data=obj,
        event_type="MyEntity",
        type="xyz",
    )
    # This works:
    # print(evt.model_dump(mode="python"))

    # But this does not:
    print(evt.model_dump(mode="json"))

Stack trace snippet:

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/hans/Library/Application Support/JetBrains/PyCharm2023.2/scratches/scratch_42.py", line 30, in <module>
    print(evt.model_dump(mode="json"))
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hans/Library/Caches/pypoetry/virtualenvs/cvPU66vz-py3.11/lib/python3.11/site-packages/pydantic/main.py", line 308, in model_dump
    return self.__pydantic_serializer__.to_python(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.PydanticSerializationError: Error calling function `_ce_json_dumps`: TypeError: Object of type MyEntity is not JSON serializable

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hozn avatar hozn commented on June 26, 2024

We're using fastapi, so the workaround I'm using for the above nested-object serialization issue is:

from fastapi.encoders import jsonable_encoder

jsonable_encoder(event.model_dump(mode="python"))

Which works ... but this used to work without these extra hoops in pydantic v1 (and older cloudevents lib).

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