Human Attributes

It's a Gem to convert ActiveRecord models' attributes and methods to human readable representations of these.

• Human Attributes
  • Installation
  • Usage
  • Formatters
    • Numeric
    • Date
    • DateTime
    • Boolean
    • Enumerize
    • Enum
    • Custom Formatter
  • Common Options
    • Default
    • Suffix
  • Multiple Formatters
  • Humanize Active Record Attributes
  • Integration with Draper Gem
  • Rake Task
  • Testing
  • Publishing
  • Contributing
  • Credits
  • License

Installation

Add to your Gemfile:

gem "human_attributes"

bundle install

Usage

Suppose you have the following model:

# == Schema Information
#
# Table name: purchases
#
#  id          :integer          not null, primary key
#  paid        :boolean
#  commission  :decimal(, )
#  quantity    :integer
#  state       :string
#  expired_at  :datetime
#  amount      :decimal(, )
#  description :text
#  created_at  :datetime         not null
#  updated_at  :datetime         not null
#

class Purchase < ActiveRecord::Base
  extend Enumerize

  STATES = %i{pending canceled finished}

  enumerize :state, in: STATES, default: :pending

  def commission_amount
    amount * commission / 100.0
  end
end

Executing the humanize method, inside the class definition, will allow you to apply Formatters to Purchase's attributes and methods.

Formatters

Numeric

With...

purchase = Purchase.new
purchase.quantity = 20
purchase.commission = 5.3

And having...

class Purchase < ActiveRecord::Base
  humanize :quantity, percentage: true
  humanize :commission, :commission_amount, currency: { unit: "R$", separator: ",", delimiter: "" }
end

You can do...

purchase.human_quantity #=> "20.000%"
purchase.human_commission #=> "R$5,30"
purchase.human_commission_amount #=> R$1 060 000,03

The available numeric types are:currency, number, size, percentage, phone, delimiter and precision.

And the options to use with numeric types, are the same as in NumberHelper

Date

With...

purchase = Purchase.new
purchase.expired_at = "04/06/1984 09:20:00"
purchase.created_at = "04/06/1984 09:20:00"
purchase.updated_at = "04/06/1984 09:20:00"

And /your_app/config/locales/en.yml

en:
  date:
    formats:
      default: "%Y-%m-%d"
      short: "%b %d"

And having...

class Purchase < ActiveRecord::Base
  humanize :expired_at, date: { format: :short }
  humanize :created_at, date: true
  humanize :updated_at, date: { format: "%Y" }
end

You can do...

purchase.human_expired_at #=> "04 Jun"
purchase.human_created_at #=> "1984-06-04"
purchase.human_updated_at #=> "1984"

DateTime

With...

purchase = Purchase.new
purchase.expired_at = "04/06/1984 09:20:00"
purchase.created_at = "04/06/1984 09:20:00"
purchase.updated_at = "04/06/1984 09:20:00"

And /your_app/config/locales/en.yml

en:
  time:
    formats:
      default: "%a, %d %b %Y %H:%M:%S %z"
      short: "%d %b %H:%M"

And having...

class Purchase < ActiveRecord::Base
  humanize :expired_at, datetime: { format: :short }
  humanize :created_at, datetime: true
  humanize :updated_at, datetime: { format: "%Y" }
end

You can do...

purchase.human_expired_at #=> "04 Jun 09:20"
purchase.human_created_at #=> "Mon, 04 Jun 1984 09:20:00 +0000"
purchase.human_updated_at #=> "1984"

Boolean

With...

purchase = Purchase.new
purchase.paid = true

And /your_app/config/locales/en.yml

en:
  boolean:
    positive: "Yes"
    negative: "No"

Having...

class Purchase < ActiveRecord::Base
  humanize :paid, boolean: true
end

You can do...

purchase.human_paid #=> "Yes"
purchase.paid = false
purchase.human_paid #=> "No"

Enumerize

Installing Enumerize gem with...

purchase = Purchase.new
purchase.state = :finished

And /your_app/config/locales/en.yml

en:
  enumerize:
    purchase:
      state:
        pending: "P."
        finished: "F."
        canceled: "C."

Having...

class Purchase < ActiveRecord::Base
  humanize :state, enumerize: true
end

You can do...

purchase.state = :finished
purchase.human_state #=> "F."

Enum

Having...

class Purchase < ActiveRecord::Base
  enum payment_method: [:credit, :debit, :cash, :bitcoin]
end

You can add

class Purchase < ActiveRecord::Base
  enum payment_method: [:credit, :debit, :cash, :bitcoin]
  humanize :payment_method, enum: true
end

And /your_app/config/locales/en.yml

en:
  activerecord:
   attributes:
    purchase:
      payment_methods:
        credit: "Credit Card"
        debit: "Debit Card"
        cash: "Cash"
        bitcoin: "Bitcoin"

And then you can do...

purchase = Purchase.new
purchase.payment_method = :debit
purchase.human_payment_method #=> "Debit Card"

If you want to use the same enum translations for multiple models, use this locales structure:

/your_app/config/locales/en.yml

en:
  enum:
    default:
      payment_methods:
        credit: "Credit Card"
        debit: "Debit Card"
        cash: "Cash"
        bitcoin: "Bitcoin"

and then in other models will also work:

class Debt < ActiveRecord::Base
  enum payment_method: [:credit, :debit, :cash, :bitcoin]
  humanize :payment_method, enum: true
end

purchase = Purchase.new
purchase.payment_method = :debit

debt = Debt.new
debt.payment_method = :bitcoin

purchase.human_payment_method #=> "Debit Card"
debt.human_payment_method #=> "Bitcoin"

Custom Formatter

With...

purchase = Purchase.create!

And having...

class Purchase < ActiveRecord::Base
  humanize :id, custom: { formatter: ->(purchase, value) { "Purchase: #{value}-#{purchase.id}" } }
end

You can do...

purchase.human_id #=> "Purchase: 1-1"

Common Options

The following options are available to use with all the formatters presented before.

Default

With...

purchase = Purchase.new
purchase.amount = nil

Having...

class Purchase < ActiveRecord::Base
  humanize :amount, currency: { default: 0 }
end

You can do...

purchase.human_amount #=> "$0"

Suffix

Useful when you want to define multiple formatters for the same attribute.

With...

purchase = Purchase.new
purchase.paid = true
purchase.amount = 20

Having...

class Purchase < ActiveRecord::Base
  humanize :paid, boolean: { suffix: "with_custom_suffix" }
  humanize :amount, currency: { suffix: true }
end

You can do...

purchase.paid_with_custom_suffix #=> "Yes"
purchase.amount_to_currency #=> "$20" # default suffix

Multiple Formatters

With...

purchase = Purchase.new
purchase.amount = 20

Having...

class Purchase < ActiveRecord::Base
  humanize :amount, currency: { suffix: true }, percentage: { suffix: true }
end

You can do...

purchase.amount_to_currency #=> ""
purchase.amount_to_percentage #=> ""

Remember to use :suffix option to avoid name collisions

Humanize Active Record Attributes

You can generate human representations for all the atributes of your ActiveRecord model like this:

class Purchase < ActiveRecord::Base
  humanize_attributes
end

The humanize_attributes method will infer from the attribute's data type which formatter to choose. With our Purchase model we will get:

purchase.human_id
purchase.human_paid
purchase.human_commission
purchase.human_quantity
purchase.human_expired_at
purchase.expired_at_to_short_date
purchase.expired_at_to_long_date
purchase.expired_at_to_short_datetime
purchase.expired_at_to_long_datetime
purchase.human_amount
purchase.human_created_at
purchase.created_at_to_short_date
purchase.created_at_to_long_date
purchase.created_at_to_short_datetime
purchase.created_at_to_long_datetime
purchase.human_updated_at
purchase.updated_at_to_short_date
purchase.updated_at_to_long_date
purchase.updated_at_to_short_datetime
purchase.updated_at_to_long_datetime

You can pass to humanize_attributes the option only: [:attr1, :attr2] to humanize specific attributes. The except option works in similar way.

Integration with Draper Gem

If you are thinking that the formatting functionality is a view related issue, you are right. Because of this, we made the integration with Draper gem. Using draper, you can move all your humanizers to your model's decorator.

With...

class Purchase < ActiveRecord::Base
  extend Enumerize

  STATES = %i{pending canceled finished}

  enumerize :state, in: STATES, default: :pending

  humanize :state, enumerize: true
  humanize :commission, percentage: true
  humanize :amount, currency: true
end

You can refactor your code like this:

class Purchase < ActiveRecord::Base
  extend Enumerize

  STATES = %i{pending canceled finished}

  enumerize :state, in: STATES, default: :pending
end

class PurchaseDecorator < Draper::Decorator
  delegate_all

  humanize :state, enumerize: true
  humanize :commission, percentage: true
  humanize :amount, currency: true
end

Then, you can use it, like this:

purchase.human_amount #=> NoMethodError: undefined method `human_amount'
purchase.decorate.human_amount #=> $2,000,000.95

It's not mandatory to use draper as decorator. You can extend whatever you want including HumanAttributes::Extension. For example:

Draper::Decorator.send(:include, HumanAttributes::Extension)

Rake Task

You can run, from your terminal, the following task to show defined human attributes for a particular ActiveRecord model.

$ rake human_attrs:show[your-model-name]

So, with...

class Purchase < ActiveRecord::Base
  extend Enumerize

  STATES = %i{pending canceled finished}

  enumerize :state, in: STATES, default: :pending

  humanize_attributes
  humanize :state, enumerize: true
  humanize :commission, percentage: true
  humanize :amount, currency: true
end

And running rake human_attrs:show[purchase], you will see the following output:

human_id => Purchase: #1
human_paid => Yes
human_commission => 1000.990%
human_quantity => 1
human_expired_at => Fri, 06 Apr 1984 09:00:00 +0000
expired_at_to_short_date => Apr 06
expired_at_to_long_date => Apr 06
expired_at_to_short_datetime => 06 Apr 09:00
expired_at_to_long_datetime => 06 Apr 09:00
human_amount => $2,000,000.95
human_created_at => Sat, 10 Dec 2016 21:18:15 +0000
created_at_to_short_date => Dec 10
created_at_to_long_date => Dec 10
created_at_to_short_datetime => 10 Dec 21:18
created_at_to_long_datetime => 10 Dec 21:18
human_updated_at => Sat, 10 Dec 2016 21:18:15 +0000
updated_at_to_short_date => Dec 10
updated_at_to_long_date => Dec 10
updated_at_to_short_datetime => 10 Dec 21:18
updated_at_to_long_datetime => 10 Dec 21:18
human_state => Pending

Testing

To run the specs you need to execute, in the root path of the gem, the following command:

bundle exec guard

To run all the specs of the gem, in the root path of the gem, the following command:

bundle exec rspec

You need to put all your tests in the /human_attributes/spec/dummy/spec/ directory.

Publishing

On master/main branch...

1. Change VERSION in lib/gemaker/version.rb.
2. Change Unreleased title to current version in CHANGELOG.md.
3. Run bundle install.
4. Commit new release. For example: Releasing v0.1.0.
5. Create tag. For example: git tag v0.1.0.
6. Push tag. For example: git push origin v0.1.0.

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Credits

Thank you contributors!

Human Attributes is maintained by platanus.

License

Human Attributes is © 2016 platanus, spa. It is free software and may be redistributed under the terms specified in the LICENSE file.