Active Model Naming

Creates a model_name method on your object.

To implement, just extend ActiveModel::Naming in your object:

class BookCover
  extend ActiveModel::Naming
end

BookCover.model_name        # => "BookCover"
BookCover.model_name.human  # => "Book cover"

BookCover.model_name.i18n_key              # => "book_cover"
BookModule::BookCover.model_name.i18n_key  # => "book_module.book_cover"

Providing the functionality that ActiveModel::Naming provides in your object is required to pass the Active Model Lint test. So either extending the provided method below, or rolling your own is required.

Methods
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Class Public methods
param_key(record_or_class)

Returns string to use for params names. It differs for namespaced models regarding whether it’s inside isolated engine.

For isolated engine: ActiveModel::Naming.param_key(Blog::Post) #=> post

For shared engine: ActiveModel::Naming.param_key(Blog::Post) #=> blog_post

Source: show | on GitHub 

# File activemodel/lib/active_model/naming.rb, line 128
def self.param_key(record_or_class)
  model_name_from_record_or_class(record_or_class).param_key
end
plural(record_or_class)

Returns the plural class name of a record or class. Examples:

ActiveModel::Naming.plural(post)             # => "posts"
ActiveModel::Naming.plural(Highrise::Person) # => "highrise_people"

Source: show | on GitHub 

# File activemodel/lib/active_model/naming.rb, line 88
def self.plural(record_or_class)
  model_name_from_record_or_class(record_or_class).plural
end
route_key(record_or_class)

Returns string to use while generating route names. It differs for namespaced models regarding whether it’s inside isolated engine.

For isolated engine: ActiveModel::Naming.route_key(Blog::Post) #=> posts

For shared engine: ActiveModel::Naming.route_key(Blog::Post) #=> blog_posts

Source: show | on GitHub 

# File activemodel/lib/active_model/naming.rb, line 116
def self.route_key(record_or_class)
  model_name_from_record_or_class(record_or_class).route_key
end
singular(record_or_class)

Returns the singular class name of a record or class. Examples:

ActiveModel::Naming.singular(post)             # => "post"
ActiveModel::Naming.singular(Highrise::Person) # => "highrise_person"

Source: show | on GitHub 

# File activemodel/lib/active_model/naming.rb, line 96
def self.singular(record_or_class)
  model_name_from_record_or_class(record_or_class).singular
end
uncountable?(record_or_class)

Identifies whether the class name of a record or class is uncountable. Examples:

ActiveModel::Naming.uncountable?(Sheep) # => true
ActiveModel::Naming.uncountable?(Post) => false

Source: show | on GitHub 

# File activemodel/lib/active_model/naming.rb, line 104
def self.uncountable?(record_or_class)
  plural(record_or_class) == singular(record_or_class)
end
Instance Public methods
model_name()

Returns an ActiveModel::Name object for module. It can be used to retrieve all kinds of naming-related information.

Source: show | on GitHub 

# File activemodel/lib/active_model/naming.rb, line 77
def model_name
  @_model_name ||= begin
    namespace = self.parents.detect { |n| n.respond_to?(:_railtie) }
    ActiveModel::Name.new(self, namespace)
  end
end