FluentValidation.js
Inspired by the awsome FluentValdiation .NET
A node.js package for providing a model validation based on a chain of rules with a fluent syntax.
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Get Started
This is a Node.js module available through the
npm registry. Installation is using the
npm install command:
npm i @kalstong/fluentvalidationExample 1 - Standard rules
import FluentValidation from '@kalstong/fluentvalidation';
const person = {
name : 'John Doe',
age : 'unknown'
}
const config = {
breakOnFirstError : true // Stop at first error
}
const validation = new FluentValidation()
.Config(config)
.RuleFor(person.name).NotEmpty().ErrorMessage("Name cannot be empty")
.RuleFor(person.age).IsNumber().ErrorMessage("Age must be a number")
.errors;
console.log(validation);
// Output:
// [ { error: 'Age must be a number' } ]Example 2 - Custom rules
import FluentValidation from '@kalstong/fluentvalidation';
const model = {
state : 'idle'
}
const config = {
breakOnFirstError : true // Stop at first error
}
function BeActive(data) {
return (data === 'active');
}
const validation = new FluentValidation()
.Config(config)
.RuleFor(model.state).IsNotNullOrWhitespace().ErrorMessage("State cannot be empty")
.RuleFor(model.state).Must(BeActive).ErrorMessage("State is not Active")
.errors;
console.log(validation);
// Output:
// [ { error: 'State is not Active' } ]