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"

# File activemodel/lib/active_model/naming.rb, line 296
def self.param_key(record_or_class)
  model_name_from_record_or_class(record_or_class).param_key
end

Returns the plural class name of a record or class.

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

# File activemodel/lib/active_model/naming.rb, line 241
def self.plural(record_or_class)
  model_name_from_record_or_class(record_or_class).plural
end

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.

# File activemodel/lib/active_model/naming.rb, line 284
def self.route_key(record_or_class)
  model_name_from_record_or_class(record_or_class).route_key
end

Returns the singular class name of a record or class.

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

# File activemodel/lib/active_model/naming.rb, line 249
def self.singular(record_or_class)
  model_name_from_record_or_class(record_or_class).singular
end

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"

# File activemodel/lib/active_model/naming.rb, line 269
def self.singular_route_key(record_or_class)
  model_name_from_record_or_class(record_or_class).singular_route_key
end

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

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

# File activemodel/lib/active_model/naming.rb, line 257
def self.uncountable?(record_or_class)
  plural(record_or_class) == singular(record_or_class)
end

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 < ActiveModel::Model
end

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

# File activemodel/lib/active_model/naming.rb, line 228
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