Koa validated route

npm install --save @abradley2/koa-validated-route

This is a very simple wrapper around koa-route and is-my-json-valid. Refer to their documentation for how route argument passing, matching, and schema validation work. This simply adds them together in a simple wrapper so you don't need to manually initialize validators, and send back 400s with the error list yourself

API

Use the main exported method the same you would with koa-route as this module simply wraps your handler and proxies to that. For any route handler that has a validate object property, this property will be used to generate validation schemas for the body or query of the request (note you don't need to bother with type: object, required: true on the root of any body or query schema, this is taken care of).

The specification underlying this validation is this big scary spec document with lots of words but it's actually fairly straight-forward in practice

Example

const app = require('koa')()
const withValidation = require('koa-validated-route')

function submitRoute(ctx, sessionId) {
  // we won't reach here if the validation fails.
  // so now we can proceed with confidence!
}

submitRoute.schema = {
  body: {
    title: {
      type: 'string',
      required: true
    },
    isMarried: {
      type: 'boolean',
      required: true
    }
  },
  query: {
    userId: {
      type: 'string', // all query params are going to be string so duh
      required: false
    }
  }
}

app.use(
  withValidation.post('/submit/:sessionId', submitRoute)
)