ActiveModel::AttributesValidation

Add attributes_valid? method in your model to validate a specific attribute/attributes. Can be easily used with ActiveRecord.

Installation

Add this line to your application's Gemfile:

gem 'active_model-attributes_validation'

And then execute:

$ bundle

Or install it yourself as:

$ gem install active_model-attributes_validation

Usage

You can include it:

class Model
  include ActiveModel::Model
  include ActiveModel::AttributesValidation
end

For ActiveRecord it will be loaded automatically.

Example:

class Person
  include ActiveModel::Model
  include ActiveModel::AttributesValidation

  attr_accessor :name, :age
  validates_presence_of :name
  validates_presence_of :age
end

person = Person.new
person.attributes_valid?(:name) # => false
person.errors.messages # => {:name=>["can't be blank"]}

person.attributes_valid?(:name, :age) # => false
person.errors.messages # => {:name=>["can't be blank"], :age=>["can't be blank"]}

# standard full validation
person.valid? # => false
person.errors.messages # => {:name=>["can't be blank"], :age=>["can't be blank"]}

person.name = 'bill'
person.attributes_valid?(:name) # => true
person.errors.messages # => {}

See specs for more information.

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