FieldsValidator

FieldsValidator is useful to make validation of data with different sources like a mongoose model, an array of required fields, ... With this npm you can dramatically reduce your code and your replication code

Examples

+ With a mongoose model

function checkSchema(Model, fields, [omissions])

Arguments

1. Model (Object): the mongoose model reference
2. fields (Object): the fields you want to check and validate
3. omissions (Array): values to omit in the schema of the Model

Here is an exemple of what you had before :

var User = mongoose.model('Users', UserSchema);
function signup(req, res) {
	if (!req.body.password) {
		return res.status(400).send('Password is required');
	}
	else if (typeof req.body.password !== 'string') {
		return res.status(400).send('Password must be a string');
	}

	if (!req.body.email) {
		return res.status(400).send('Email is required');
	}
	else if (typeof req.body.email !== 'string') {
		return res.status(400).send('Email must be a string');
	}

        ...
        User.save();
        ....
}

And what you'll have with fieldsValidator :

var User = mongoose.model('Users', UserSchema);
function signup(req, res) {
	var error = fieldsValidator.checkSchema(Users, req.body, ['hashed_password', 'salt']);

      if (error) {
        return res.status(400).send(error);
      }

      ...
      User.save();
      ....
}

+ With the docs of your swagger-ui

Use your docs to help your logic

function checkSwagger(swaggerParameters, fields)

Arguments

1. swaggerParameters (Array): the array which contained the fields of your methods in your swagger spec files
2. fields (Object): the fields you want to check and validate

Here is an exemple of a swagger spec files :

{
  paths: {
    '/login': {
      post: {
        tags: ['auth'],
        summary: 'Login',
        operationId: 'login',
        parameters: [{ in : 'formData',
          name: 'email',
          description: 'email to login',
          required: true,
          type: 'string'
        }, { in : 'formData',
          name: 'password',
          description: 'password to login',
          required: true,
          type: 'string'
        }]
      }
    }
}
}

And what you'll have with fieldsValidator :

var User = mongoose.model('Users', UserSchema);
function signup(req, res) {
	var error = fieldsValidator.checkSwagger(swaggerSpecs['/login'].post.parameters,req.body);

      if (error) {
        return res.status(400).send(error);
      }

        ...
        User.save();
        ....
}

+ With an array of custom required fields

function checkFieldsRequired(requiredFields, fields)

Arguments

1. requiredFields (Array): the array which contained the custom required fields
2. fields (Object): the fields you want to check and validate

Here is an exemple of what you had before :

var User = mongoose.model('Users', UserSchema);
function signup(req, res) {
	if (!req.body.password) {
		return res.status(400).send('Password is required');
	}
	else if (typeof req.body.password !== 'string') {
		return res.status(400).send('Password must be a string');
	}

	if (!req.body.email) {
		return res.status(400).send('Email is required');
	}
	else if (typeof req.body.email !== 'string') {
		return res.status(400).send('Email must be a string');
	}

        ...
        User.save();
        ....
}

And what you'll have with fieldsValidator :

var User = mongoose.model('Users', UserSchema);
function signup(req, res) {
	var error = fieldsValidator.checkFieldsRequired(['password', 'email'],req.body);

      if (error) {
        return res.status(400).send(error);
      }

        ...
        User.save();
        ....
}

Roadmap

• Make a function to fetch automatically the configs of your swagger

Feel free to make pull request

Made by Coenen Benjamin with love

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