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#[derive(Deserialize)]
pub struct SignupData {
#[validate(email)]
email: String,
// this would first run min_length and then call validate_unique_username
#[validate(min_length=2, custom=validate_unique_username)]
username: String,
#[validate(min_length=8, max_length=255)]
password: String,
}
pub fn validate_unique_username(username String) -> Option<Something> {
...
}
// And to use
// first basic serialization errors
let data: SignupData = serde_json::from_str(&serialized);
// then a magic method added () -> Option<ValidationError> with ValidationError being a hashmap
let errors = data.validate();
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