sails-hook-validation-ev

About

Sails 1.x hook for validating REST requests with the help of express-validator. Because - why reinvent the wheel? Uses the same configuration functions as express-validator. Supports validators, sanitizers, localization, ...

Installation

As simple as npm install --save sails-hook-validation-ev.

Usage with blueprints

For models with blueprint routes you wish to validate, you need only add a validate function to it.

Example model

Todo.js:

module.exports = {

  attributes: {
    title: {    
      type: 'string',   
      required: true    
    },  
     description: { 
      type: 'string',   
      required: true    
    },
  },

  validate: (req) => {
    req.check('title')
      .exists()
      .isLength({ min: 1 }).withMessage('must be at least 5 chars long');
    req.check('description').exists();
  }

};

For info on which functions you can use, see express-validator check API. It opens a world of possibilities :)

Example POST /todo response

{
    "errors": [
        {
            "location": "params",
            "param": "title",
            "msg": "Invalid value"
        },
        {
            "location": "params",
            "param": "title",
            "msg": "must be at least 5 chars long"
        }
    ]
}

Usage with custom handlers

Example TodoController.js

The following snippet will override default /POST blueprint handler with custom function. In overridden functions you hold the responsibility to validate requests.

Option 1: Validate via validate function in model

TodoController.js:

  var validate = require('sails-hook-validation-ev/lib/validate')

  module.exports = {
    create: async function(req, res) {
      validate(req)
      const errors = await req.getValidationResult();
      if (!errors.isEmpty()) {
          return res.status(400).json({ errors: errors.array() });
      }
      return res.ok()
    }  
  };

Option 2: Provide a custom validate function

TodoController.js:

  var validate = require('sails-hook-validation-ev/lib/validate')

  module.exports = {
    create: async function(req, res) {
      validate(req, (req) => {
        req.check('title')
          .exists()
          .isLength({ min: 1 }).withMessage('must be at least 5 chars long');
        req.check('description').exists();
      })

      const errors = await req.getValidationResult();
      if (!errors.isEmpty()) {
          return res.status(400).json({ errors: errors.array() });
      }
      return res.ok()
    }  
  };