Module: ActiveModel::Naming

Included in:
Translation
Defined in:
lib/active_model/naming.rb

Overview

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.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.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(base) ⇒ Object

:nodoc:



219
220
221
222
 
# File 'lib/active_model/naming.rb', line 219

def self.extended(base) #:nodoc:
  base.remove_possible_method :model_name
  base.delegate :model_name, to: :class
end

.param_key(record_or_class) ⇒ Object

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"



304
305
306
 
# File 'lib/active_model/naming.rb', line 304

def self.param_key(record_or_class)
  model_name_from_record_or_class(record_or_class).param_key
end

.plural(record_or_class) ⇒ Object

Returns the plural class name of a record or class.

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



249
250
251
 
# File 'lib/active_model/naming.rb', line 249

def self.plural(record_or_class)
  model_name_from_record_or_class(record_or_class).plural
end

.route_key(record_or_class) ⇒ Object

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"

The route key also considers if the noun is uncountable and, in such cases, automatically appends _index.



292
293
294
 
# File 'lib/active_model/naming.rb', line 292

def self.route_key(record_or_class)
  model_name_from_record_or_class(record_or_class).route_key
end

.singular(record_or_class) ⇒ Object

Returns the singular class name of a record or class.

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



257
258
259
 
# File 'lib/active_model/naming.rb', line 257

def self.singular(record_or_class)
  model_name_from_record_or_class(record_or_class).singular
end

.singular_route_key(record_or_class) ⇒ Object

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.singular_route_key(Blog::Post) # => "post"

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



277
278
279
 
# File 'lib/active_model/naming.rb', line 277

def self.singular_route_key(record_or_class)
  model_name_from_record_or_class(record_or_class).singular_route_key
end

.uncountable?(record_or_class) ⇒ Boolean

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

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

Returns:

  • (Boolean) 


265
266
267
 
# File 'lib/active_model/naming.rb', line 265

def self.uncountable?(record_or_class)
  plural(record_or_class) == singular(record_or_class)
end

Instance Method Details

#model_name ⇒ Object

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

class Person
  extend ActiveModel::Naming
end

Person.model_name.name     # => "Person"
Person.model_name.class    # => ActiveModel::Name
Person.model_name.singular # => "person"
Person.model_name.plural   # => "people"



236
237
238
239
240
241
242
243
 
# File 'lib/active_model/naming.rb', line 236

def model_name
  @_model_name ||= begin
    namespace = self.parents.detect do |n|
      n.respond_to?(:use_relative_model_naming?) && n.use_relative_model_naming?
    end
    ActiveModel::Name.new(self, namespace)
  end
end