Struct ValidatorChain 

pub struct ValidatorChain(/* private fields */);

Validator that runs several validators in order.

The value is valid when every validator accepts it; the error of the first failing validator is returned. #[derive(Table)] uses it when a column declares more than one #[validate(...)] attribute, keeping the declaration order (top to bottom).

Example

use wasm_dbms_api::prelude::{
    MaxStrlenValidator, MinStrlenValidator, Validate as _, ValidatorChain, Value,
};

let validator = ValidatorChain::new(vec![
    Box::new(MinStrlenValidator(2)),
    Box::new(MaxStrlenValidator(5)),
]);
assert!(validator.validate(&Value::Text("abc".into())).is_ok());
assert!(validator.validate(&Value::Text("a".into())).is_err());
assert!(validator.validate(&Value::Text("abcdef".into())).is_err());

Implementations

impl ValidatorChain

pub fn new(validators: Vec<Box<dyn Validate>>) -> Self

Creates a chain running validators in the given order.

Trait Implementations

impl Debug for ValidatorChain

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Validate for ValidatorChain

fn validate(&self, value: &Value) -> DbmsResult<()>

Validates the given crate::prelude::Value.