1 unstable release
0.0.0 | Oct 22, 2020 |
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#11 in #ruleset
Used in vale
25KB
316 lines
Vale
Vale stands for Valid Entity, and is a simple library that provides entity validation through either annotations, or through a Fluent-style implementation. At the core of the library is the vale::Validate
trait, which implies that a piece of data can be validated. The library also offers supoort for the rocket
webframework. If you're interested in adding support for other frameworks, do not hesitate to open a PR!
Example
This example shows how to derive the validation trait
use vale::Validate;
#[derive(Validate)]
struct Entity {
#[validate(gt(0))]
id: i32,
#[validate(len_lt(5), with(add_element))]
others: Vec<i32>,
#[validate(eq("hello world"))]
msg: String,
}
fn add_element(v: &mut Vec<i32>) -> bool {
v.push(3);
true
}
fn main() {
let mut e = get_entity();
if let Err(errs) = e.validate() {
println!("The following validations failed: {:?}", errs);
}
}
It is also possible to use fluent-style validation:
struct Entity {
id: i32,
others: Vec<i32>,
msg: String,
}
impl vale::Validate for Entity {
#[vale::ruleset]
fn validate(&mut self) -> vale::Result {
vale::rule!(self.id > 0, "`id` is nonpositive!");
vale::rule!(self.others.len() < 5, "Too many others");
}
}
Dependencies
~1.5MB
~36K SLoC