GitHub - thadeu/revector: 🔃 Simple wrapper to filter array using Ruby and simple predicate conditions

🔃 revector

Simple wrapper to filter array using Ruby and simple predicate conditions

Motivation

Because in sometimes, we need filter array passing conditions. This gem simplify this work.

Documentation

Version	Documentation
unreleased	https://github.com/thadeu/revector/blob/main/README.md

Compatibility

kind	branch	ruby
unreleased	main	>= 2.7

Installation

Use bundle

or add this line to your application's Gemfile.

and then, require module

Configuration

Without configuration, because we use only Ruby. ❤️

Availables Predicates for all values

Type	Suffix	Value
Equal	eq	Anywhere
NotEqual	noteq	Anywhere
Exists	ex	Anywhere
NotExists	not_ex	Anywhere
Contains	cont	Anywhere
NotContains	notcont, not_cont	Anywhere
Included	in	Anywhere
NotIncluded	notin, not_in	Anywhere
Start	start, st	Anywhere
NotStart	notstart, notst, not_start, not_st	Anywhere
End	end	Anywhere
NotEnd	notend, not_end	Anywhere
LessThan	lt	Anywhere
LessThanEqual	lteq	Anywhere
GreaterThan	gt	Anywhere
GreaterThanEqual	gteq	Anywhere

Availables Predicates only when value is Hash

💡 Below predicates works only when value is Hash

Type	Suffix	Value
NotEqual	not_eq	Hash
NotContains	not_cont	Hash
NotIncluded	not_in	Hash
NotStart	not_start	Hash
NotEnd	not_end	Hash

Usage

Think that your data seems like this.

data = [
  {
    id: 1,
    name: 'Test #1',
    email: 'test1@email1.com',
    schedule: { all_day: true },
    numbers: %w[1 2],
    active: true,
    count: 9
  },
  {
    id: 2,
    name: 'Test #2',
    email: 'test2@email2.com',
    schedule: { all_day: false },
    numbers: %w[3 4],
    active: true,
    count: 10
  },
  {
    id: 3,
    name: 'Test #3',
    email: 'test3@email3.com',
    schedule: { all_day: false },
    numbers: %w[5 6],
    active: false,
    count: 99
  }
]

You can use one or multiples predicates in your filter. We see some use cases.

Flexible Use Case (Hash)

Equal

filters = {
  active: {
    eq: true
  }
}

collection = Revector.swap(data, filters)

NotEqual

filters = {
  active: {
    # noteq or not_eq
    not_eq: true
  }
}

collection = Revector.swap(data, filters)

Nested Hash Paths

filters = {
  'schedule.all_day': {
    eq: true
  }
}

collection = Revector.swap(data, filters)

Nested Array Paths

Note the .0 🎉

filters = {
  'numbers.0': {
    eq: '3'
  }
}

collection = Revector.swap(data, filters)

filters = {
  numbers: {
    in: '3' # or in: ['3']
  }
}

collection = Revector.swap(data, filters)

Using default Equal predicate.

Revector.swap(data, numbers: 3)

Revector.swap(data, active: true)

Revector.swap(data, id: 3)

If array, you can navigate into self, using property.NUMBER.property

data = [
  {
    schedules: [
      {
        opened: true,
        all_day: true
      },
      {
        opened: false,
        all_day: true
      }
    ]
  },
  {
    schedules: [
      {
        opened: false,
        all_day: true
      },
      {
        opened: false,
        all_day: true
      }
    ]
  }
]

filters = {
  'schedules.0.opened': {
    eq: true
  }
}

# OR

filters = {
  'schedules[0]opened': {
    eq: true
  }
}

# OR

filters = {
  'schedules.[0].opened': {
    eq: true
  }
}

collection = Revector.swap(data, filters)

# [{ schedules: [{ opened: true, all_day: true }, { opened: false, all_day: true }] }]

Amazing, you can pass a Callable value as value, like this.

filters = {
  'schedules.[0].opened': {
    eq: -> { true }
  }
}

# OR a Module

module ActiveTruthy
  def self.call = true
end

module NumbersAvailable
  def self.call = %w[1 2]
end

filters = {
  'schedules.[0].opened': {
    eq: ActiveTruthy
  },
  numbers: {
    in: NumbersAvailable
  }
}

# OR a Class

class ActiveFalsey
  def self.call = false
end

filters = {
  'schedules.[0].opened': {
    eq: ActiveFalsey
  }
}

collection = Revector.swap(data, filters)

Combine conditions

Yes, you can combine one or multiple predicates to filter you array.

filters = {
  active: { eq: true },
  numbers: {
    in: %w[5],
    not_in: '10'
  },
  email: {
    cont: 'email1',
    not_cont: '@gmail'
  },
  'schedule.all_day': {
    in: [true, false]
  }
}

collection = Revector.swap(data, filters)

Querystring Use Case

Equal

filters = { active_eq: true }

collection = Revector.swap(data, filters)

NotEqual

filters = { active_noteq: true }

collection = Revector.swap(data, filters)

Nested Hash Paths

filters = { 'schedule.all_day_eq': false }

collection = Revector.swap(data, filters)

Nested Array Paths

Note the .0 🎉

filters = { 'numbers.0_eq': '3' }

collection = Revector.swap(data, filters)

filters = { numbers_in: ['1'] }

collection = Revector.swap(data, filters)

expect(collection.size).to eq(1)

Combine conditions

Yes, you can combine one or multiple predicates to filter you array.

filters = {
  active_noteq: true,
  numbers_in: %w[5],
  email_cont: 'test3',
  'schedule.all_day_eq': false
}

collection = Revector.swap(data, filters)

Receive querystring in your route

Like Ransack, imagine that you receive an querystring and you want to filter your Array. So, you can to do something like this.

⚠️ But security is your responsability, ok? Let's go!

# receive querystring in your route
querystring = "active_noteq=true&numbers_in=5&email_cont=test3&schedule.all_day_eq=false"

# parse querystring and transform to Hash
params = URI.decode_www_form(querystring).to_h

# filter your collection using params directly.
collection = Revector.swap(data, filters)

# Beautiful, right? 🎉

⬆️ Back to Top

Development

After checking out the repo, run bin/setup to install dependencies. Then, run bundle exec rspec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/thadeu/revector. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.