Fix pydantic type decorator - add missing internal methods

[Git-Lior]

I noticed that when wrapping a class with @strawberry.experimental.pydantic.type, internal methods "disappear" (I hope I got the terminology right, by internal methods I mean methods not marked as @strawberry.field).

See this example from the test I added:

class User(pydantic.BaseModel):
    age: int
    password: Optional[str]

@strawberry.experimental.pydantic.type(User)
class UserType:
    age: strawberry.auto
    password: strawberry.auto

    @strawberry.field
    def password_hash(self) -> int:
        return self.perform_hash(self.password)

    def perform_hash(self, data: str) -> int:
        return hash(data)

Before the change, querying for password_hash would have raised an error: AttributeError: type object 'UserType' has no attribute 'perform_hash'.

The change I propose is simple - after calling make_dataclass, add back attributes that were not copied from the original class.

Description

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Documentation

Issues Fixed or Closed by This PR

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[botberry]

Thanks for adding the RELEASE.md file!

Here's a preview of the changelog:

---

Fix pydantic type decorator - add internal methods not copied by dataclasses.make_dataclass()

Here's the tweet text:

🆕 Release (next) is out! Thanks to Git-Lior for the PR 👏

Get it here 👉 https://beta.strawberry.rocks/release/(next)