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Module: ActiveModel::Naming

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Extended In:
::ActiveRecord::Base, ::ActiveRecord::SchemaMigration
Included In:
Translation, ::ActiveRecord::Translation
Defined in: activemodel/lib/active_model/naming.rb

Overview

Creates a #model_name method on your object.

To implement, just extend 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 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

Instance Method Summary

Class Method Details

.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"
[ GitHub ] 

  


# File 'activemodel/lib/active_model/naming.rb', line 303



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.



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


  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/naming.rb', line 248



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"



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


  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/naming.rb', line 291



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.



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


  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/naming.rb', line 256



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


  








  

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

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


  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/naming.rb', line 276



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


  





  


  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/naming.rb', line 264



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


  







Instance Method Details



  

    #model_name  
  



  

    

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


  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/naming.rb', line 235



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