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While at it, what do you use to parse / validate / cast request data into nice typechecked objects?

the return value in resolve/post method will be automatically validated by the pydantic class defined in field annotation.

to better describe the relationship, it borrows the concept 'subset' from pydantic-resolve, which act like pick several fields from original class but you can still reference to it.

@subset(User) class PickedUser: ....

it's not bound with pydantic-resolve, for vanilla fastapi user if the business model are well designed and composed, it can benefited from this visualization approach too.

the goal is to make the dependencies clear for developers, and figure out the potential impacts from one node to others.

pydantic-resolve is just another my project to make the process of data composition close to ER model and get rid of glue codes like 'for loops'.