iidesuka

いいですか iidesuka - simple field validator

Simple to use

var iidesuka = require( 'iidesuka' )

var req = {
  body: {
    // userID: 'foo',
    userIDs: [ { id: 'foo' }, { id: 'bar' } ]
  }
}

var err = (
  iidesuka( req )
  .typeof( 'body', 'object', 'request body missing' )
  .typeof( 'body.userID', 'string', 'userID is not a string' )
  .instanceof( 'body.userIDs', Array, 'userIDs is not an array' )
  .ne( 'body.userIDs.length', 0, 'userIDs array is empty' )
  .forEach( 'body.userIDs' )
    .e( 'id', 'foo', 'id was not foo' )
    .done()
  .end()
)

if ( err ) console.error( err.toString() )

sample output

Invalid fields:
  typeof body.userID !== string: userID is not a string
  id not equal: id was not foo

About

Basic object field validator with simple and descriptive errors.

Why

To easily describe what you're looking for and easy to understand error messages for when things go wrong.

assert e.g. throws errors that you need to catch and the stacktraces aren't easy to understand or suitable for sending back to the user of an API.

How

Using plain old JavaScript.

Alternatives

There's a bunch of validators and verifiers on npm. This one is intended to be really simple.

Test

npm test