[drhagen]

Pydantic is so cool and I am really excited to migrate to v2. My biggest pain point in Pydantic is that it has no abstract base class for a serializer/deserializer. There is just BaseModel. This means that there is no "Pydantic interface" to implement. If I need to serialize/deserialize something other than an object with attributes, I basically can't do it in Pydantic, or at least I couldn't figure out how to do it.

In contrast, when I designed Serialite [1], I designed it to have a Serializer base class with two abstract methods: to_data and from_data. Then I added a @serializable decorator that can be applied to any dataclass, which injects concrete implementations of to_data and from_data. The decorator is what I usually use, but I sometimes implement the base class directly when it gets too complicated.

Making Serialite work with FastAPI was almost impossible because there is no interface to implement, duck type or otherwise. In the end, Serialite monkey patches some key FastAPI functions to make them understand Serialite Serializers and that seems to work.

[1] https://github.com/drhagen/serialite