News for hackers. Stuff that matters.

A comment on Keep Pydantic out of your Domain Layer. Parent comment

Re:Keep Pydantic out of your Domain Layer by codethief on Sunday July 27, 2025 @02:34PM (#44703421)
Rolls eyes… Of course you need to use a type checker. Who doesn't these days?
[ Parent | on HN ]
Re:Keep Pydantic out of your Domain Layer by JackSlateur on Sunday July 27, 2025 @02:52PM (#44703577)
Of course, I need runtime validation
[ Parent | on HN ]
Re:Keep Pydantic out of your Domain Layer by codethief on Monday July 28, 2025 @04:27PM (#44715200)
Sure, runtime validation is useful – at the boundaries of your domain! After that your type checker should ensure your data has the shape your code expects.

In other words: Parse, don't validate. https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-va...

[ Parent | on HN ]
Re:Keep Pydantic out of your Domain Layer by JackSlateur on Wednesday July 30, 2025 @01:49PM (#44737326)
Yes

The boundaries of my domain is everywhere, because stuff are built everywhere. I'm sure I am a bad dev, yet prebuilding all possibles objects I might need everytime I receive an input sounds stupid at best

(btw, this post sounds a lot like "if it compiles, it works", not gonna do this, especially in Python)

[ Parent | on HN ]