Coercion

A node.js module for type coercion.

Usage

parse = require('coercion')
parse.dateRange("2014-01-01-2014-06-01")

{
  from: Wed Jan 01 2014 01:00:00 GMT+0100 (CET),
  to: Sun Jun 01 2014 02:00:00 GMT+0200 (CEST)
}

Functions

sort

parse.sort('-created,title')

{
  created: 'desc',
  title: 'asc'
}

csv

parse.csv('allowed,created,title,notallowed', {allowed: ['allowed', 'created', 'title']})

[ 'allowed', 'created', 'title' ]

boolean

Always returns a boolean. Default value is false

// returns true for true, 'true', 1, '1', 'yes'
parse.boolean('1')

> true


parse.boolean('0')

> false

integer

Always returns a number. Default value is 0

// always returns a number
parse.integer('foo')

> 0

// Use a default value
parse.integer('foo', {default: 10})

> 10


// Use a maxium value
parse.integer(1000, {default: 10, max: 100})

> 100

positiveInteger

Always returns a number. Default value is 0

// parse.positiveInteger(number as string or int, default, max value)
parse.positiveInteger(req.query.limit, {default: 10, max: 100})

> 100

date

Always returns a date. Undefined if parsing failed.

parse.date("2014-01-01")

Wed Jan 01 2014 01:00:00 GMT+0100 (CET)

dateRange

Always returns an Object.

parse.dateRange("2014-01-01-2014-06-01")

{
  from: Wed Jan 01 2014 01:00:00 GMT+0100 (CET),
  to: Sun Jun 01 2014 02:00:00 GMT+0200 (CEST)
}

pagination

Always returns an Object. Default limit is 50

parse.pagination({page: '10'})

{
  offset: 450,
  limit: 50
}


// Override the offset
parse.pagination({offset: 450})

{
  offset: 450,
  limit: 50
}


// Set the limit
parse.pagination({page: 5, limit: 10})

{ offset: 40, limit: 10 }

middlewares

parse.middlewares.all(config)

-> returns function(req, res, next) {

  // which populates req.options
  req.options = req.options || {}

  // And pagination, sort & fields on req.options
  req.options.pagination = {
    offset: 0
    limit: 50
  }
  req.options.sort = {
    title: 'asc'
  }

  req.options.fields = ['title', 'name']
}

sort

fields

pagination