Restful filter

This library aim to convert querystring parameters into parsed json with related operators, so you would able to use the parsed values into another query action like filtering by using your model on SQL library (knex, sequelize, etc).

Features

• Filter querystring parameters
• Parse pagination by using page and count parameter
• Parse ordering by using order parameter

Installation

# via npm
npm i restful-filter --save

# via yarn
yarn add rest

Usage

const restfulFilter = require('restful-filter')

const filter = restfulFilter({ 
    case_sensitive: false // false by default, this is just example
})

# FILTER
# /api/users?name__ilike=aditya&age__eq=25&password__ilike=%a%
.get('/users', (req, res, next) => {
  const queryParams = req.query
  const allowedColumn = ['name', 'age']
  const searchParams = filter.parse(queryParams, allowedColumn).filter

  # now searchParams contains
  # {
  #   name: {operator: '$iLike', operatorSQL: 'ILIKE', column: 'name', value: 'aditya'},
  #   age: {operator: '$eq', operatorSQL: '=', column: 'age', value: '25'}
  # }
  #
  # password filter will not processed because not listed in the allowedColumn
})

# PAGINATION
# /api/users?page=2
.get('/users', (req, res, next) => {
    const queryParams = req.query
    const paginationParams = filter.parse(queryParams).paginate

    # paginationParams contains
    # {
    #   offset: 20,
    #   limit: 20   
    # }
})

# ORDER
# api/users?order_by=-id,name
.get('/users', (req, res, next) => {
    const queryParams = req.query
    const orderParams = filter.parse(queryParams).order

    # orderParams contains
    # [
    #   ['id', 'DESC']
    #   ['name', 'ASC']
    # ]

    # You even can limit the order column value by using second parameter as allowedColumn to process
    # Like 
    
    const orderParams = filter.parse(queryParams, ['id']).order

    # Would return
    # [
    #   ['id', 'DESC']
    # ]
})

Configuration

Key | Default Value | Description --- | --- | --- case_sensitive | false | Use case sensitive on query string parameter and parameter value page_param_name | page | Page parameter name to be used on querystring limit_param_name | count | Limit parameter name to be used on querystring per_page | 20 | Default number count per request if not set max_count_per_page | 100 | Maximum count for per_page parameter, so for example if count parameter value is higher than 100, the return value would stick to 100 order_param_name | order_by | Order parameter name to be used on querystring

Operators

Operator | Description | Example --- | --- | --- __eq | Find column equal with value | ?name__eq=smith __not | Not same with given value | ?active__not=true __ne | Negation, the opposite of equal | ?name__ne=smith __lt | Lower than | ?age__lt=10 __gt | Greater than | ?age__gt=15 __lte | Lower than and equal | ?age__lte=25 __gte | Greater than and equal | ?age__gte=20 __like | Like with case sensitive | ?name__like=smith __ilike | Like with case insensitive (Postgres) | ?name__ilike=smith __notLike | Opposite of like with case sensitive | ?name__notLike=smith __notILike | Opposite of like with case insensitive (Postgres) | ?name__notILike=smith __in | Find value which listed on given list | ?city__in=jakarta,bandung,bekasi __notIn | Find value which not listed in given list | ?city__notIn=bogor,depok,tangerang __contains | Find value that contains in given list (Postgres) | ?name__contains=smith __between | Find value which between 2 given values | ?date__between=2015-06-18,2017-05-31 __notBetween | Find value which is not between 2 given values | ?date__notBetween=2015-06-18,2017-05-31

Test

npm run test

Note

Please open a pull request for further abilities and another issues

License

MIT