Trait Validate 

pub trait Validate: Sized {
    // Required method
    fn validate(&mut self) -> Result<(), ValidationErrors>;
}

Normalise a value in place, then check it.

Derived with #[derive(Validate)]. Implement by hand only when the rules cannot be spelled as attributes.

&mut self is not an accident: trim and lowercase rewrite the value, and a validator that could only say no would leave every caller to do the normalising itself — which is the boilerplate this exists to delete.

Required Methods

fn validate(&mut self) -> Result<(), ValidationErrors>

Rewrite this value into its normalised form and return every rule it breaks.

Errors accumulate: a body with three bad fields reports all three, because making a user fix one mistake per round-trip is its own kind of bug.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors