313 lines
9.5 KiB
Ruby
313 lines
9.5 KiB
Ruby
require 'active_support/inflector'
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require 'active_support/core_ext/hash/except'
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require 'active_support/core_ext/module/introspection'
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module ActiveModel
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class Name
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include Comparable
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attr_reader :singular, :plural, :element, :collection,
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:singular_route_key, :route_key, :param_key, :i18n_key,
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:name
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alias_method :cache_key, :collection
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##
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# :method: ==
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#
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# :call-seq:
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# ==(other)
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#
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# Equivalent to <tt>String#==</tt>. Returns +true+ if the class name and
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# +other+ are equal, otherwise +false+.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name == 'BlogPost' # => true
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# BlogPost.model_name == 'Blog Post' # => false
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##
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# :method: ===
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#
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# :call-seq:
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# ===(other)
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#
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# Equivalent to <tt>#==</tt>.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name === 'BlogPost' # => true
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# BlogPost.model_name === 'Blog Post' # => false
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##
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# :method: <=>
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#
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# :call-seq:
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# ==(other)
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#
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# Equivalent to <tt>String#<=></tt>.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name <=> 'BlogPost' # => 0
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# BlogPost.model_name <=> 'Blog' # => 1
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# BlogPost.model_name <=> 'BlogPosts' # => -1
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##
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# :method: =~
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#
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# :call-seq:
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# =~(regexp)
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#
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# Equivalent to <tt>String#=~</tt>. Match the class name against the given
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# regexp. Returns the position where the match starts or +nil+ if there is
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# no match.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name =~ /Post/ # => 4
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# BlogPost.model_name =~ /\d/ # => nil
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##
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# :method: !~
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#
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# :call-seq:
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# !~(regexp)
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#
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# Equivalent to <tt>String#!~</tt>. Match the class name against the given
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# regexp. Returns +true+ if there is no match, otherwise +false+.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name !~ /Post/ # => false
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# BlogPost.model_name !~ /\d/ # => true
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##
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# :method: eql?
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#
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# :call-seq:
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# eql?(other)
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#
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# Equivalent to <tt>String#eql?</tt>. Returns +true+ if the class name and
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# +other+ have the same length and content, otherwise +false+.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name.eql?('BlogPost') # => true
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# BlogPost.model_name.eql?('Blog Post') # => false
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##
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# :method: to_s
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#
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# :call-seq:
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# to_s()
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#
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# Returns the class name.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name.to_s # => "BlogPost"
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##
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# :method: to_str
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#
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# :call-seq:
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# to_str()
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#
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# Equivalent to +to_s+.
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delegate :==, :===, :<=>, :=~, :"!~", :eql?, :to_s,
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:to_str, :to => :name
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# Returns a new ActiveModel::Name instance. By default, the +namespace+
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# and +name+ option will take the namespace and name of the given class
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# respectively.
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#
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# module Foo
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# class Bar
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# end
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# end
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#
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# ActiveModel::Name.new(Foo::Bar).to_s
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# # => "Foo::Bar"
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def initialize(klass, namespace = nil, name = nil)
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@name = name || klass.name
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raise ArgumentError, "Class name cannot be blank. You need to supply a name argument when anonymous class given" if @name.blank?
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@unnamespaced = @name.sub(/^#{namespace.name}::/, '') if namespace
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@klass = klass
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@singular = _singularize(@name)
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@plural = ActiveSupport::Inflector.pluralize(@singular)
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@element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(@name))
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@human = ActiveSupport::Inflector.humanize(@element)
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@collection = ActiveSupport::Inflector.tableize(@name)
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@param_key = (namespace ? _singularize(@unnamespaced) : @singular)
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@i18n_key = @name.underscore.to_sym
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@route_key = (namespace ? ActiveSupport::Inflector.pluralize(@param_key) : @plural.dup)
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@singular_route_key = ActiveSupport::Inflector.singularize(@route_key)
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@route_key << "_index" if @plural == @singular
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end
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# Transform the model name into a more humane format, using I18n. By default,
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# it will underscore then humanize the class name.
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#
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# class BlogPost
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# extend ActiveModel::Naming
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# end
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#
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# BlogPost.model_name.human # => "Blog post"
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#
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# Specify +options+ with additional translating options.
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def human(options={})
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return @human unless @klass.respond_to?(:lookup_ancestors) &&
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@klass.respond_to?(:i18n_scope)
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defaults = @klass.lookup_ancestors.map do |klass|
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klass.model_name.i18n_key
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end
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defaults << options[:default] if options[:default]
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defaults << @human
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options = { :scope => [@klass.i18n_scope, :models], :count => 1, :default => defaults }.merge!(options.except(:default))
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I18n.translate(defaults.shift, options)
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end
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private
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def _singularize(string, replacement='_')
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ActiveSupport::Inflector.underscore(string).tr('/', replacement)
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end
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end
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# == Active \Model \Naming
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#
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# Creates a +model_name+ method on your object.
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#
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# To implement, just extend ActiveModel::Naming in your object:
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#
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# class BookCover
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# extend ActiveModel::Naming
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# end
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#
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# BookCover.model_name # => "BookCover"
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# BookCover.model_name.human # => "Book cover"
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#
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# BookCover.model_name.i18n_key # => :book_cover
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# BookModule::BookCover.model_name.i18n_key # => :"book_module/book_cover"
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#
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# Providing the functionality that ActiveModel::Naming provides in your object
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# is required to pass the Active Model Lint test. So either extending the
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# provided method below, or rolling your own is required.
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module Naming
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# Returns an ActiveModel::Name object for module. It can be
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# used to retrieve all kinds of naming-related information
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# (See ActiveModel::Name for more information).
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#
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# class Person < ActiveModel::Model
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# end
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#
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# Person.model_name # => Person
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# Person.model_name.class # => ActiveModel::Name
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# Person.model_name.singular # => "person"
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# Person.model_name.plural # => "people"
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def model_name
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@_model_name ||= begin
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namespace = self.parents.detect do |n|
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n.respond_to?(:use_relative_model_naming?) && n.use_relative_model_naming?
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end
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ActiveModel::Name.new(self, namespace)
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end
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end
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# Returns the plural class name of a record or class.
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#
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# ActiveModel::Naming.plural(post) # => "posts"
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# ActiveModel::Naming.plural(Highrise::Person) # => "highrise_people"
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def self.plural(record_or_class)
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model_name_from_record_or_class(record_or_class).plural
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end
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# Returns the singular class name of a record or class.
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#
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# ActiveModel::Naming.singular(post) # => "post"
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# ActiveModel::Naming.singular(Highrise::Person) # => "highrise_person"
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def self.singular(record_or_class)
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model_name_from_record_or_class(record_or_class).singular
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end
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# Identifies whether the class name of a record or class is uncountable.
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#
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# ActiveModel::Naming.uncountable?(Sheep) # => true
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# ActiveModel::Naming.uncountable?(Post) # => false
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def self.uncountable?(record_or_class)
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plural(record_or_class) == singular(record_or_class)
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end
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# Returns string to use while generating route names. It differs for
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# namespaced models regarding whether it's inside isolated engine.
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#
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# # For isolated engine:
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# ActiveModel::Naming.route_key(Blog::Post) #=> post
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#
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# # For shared engine:
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# ActiveModel::Naming.route_key(Blog::Post) #=> blog_post
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def self.singular_route_key(record_or_class)
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model_name_from_record_or_class(record_or_class).singular_route_key
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end
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# Returns string to use while generating route names. It differs for
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# namespaced models regarding whether it's inside isolated engine.
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#
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# # For isolated engine:
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# ActiveModel::Naming.route_key(Blog::Post) #=> posts
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#
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# # For shared engine:
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# ActiveModel::Naming.route_key(Blog::Post) #=> blog_posts
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#
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# The route key also considers if the noun is uncountable and, in
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# such cases, automatically appends _index.
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def self.route_key(record_or_class)
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model_name_from_record_or_class(record_or_class).route_key
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end
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# Returns string to use for params names. It differs for
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# namespaced models regarding whether it's inside isolated engine.
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#
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# # For isolated engine:
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# ActiveModel::Naming.param_key(Blog::Post) #=> post
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#
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# # For shared engine:
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# ActiveModel::Naming.param_key(Blog::Post) #=> blog_post
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def self.param_key(record_or_class)
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model_name_from_record_or_class(record_or_class).param_key
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end
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def self.model_name_from_record_or_class(record_or_class) #:nodoc:
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if record_or_class.respond_to?(:model_name)
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record_or_class.model_name
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elsif record_or_class.respond_to?(:to_model)
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record_or_class.to_model.class.model_name
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else
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record_or_class.class.model_name
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end
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end
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private_class_method :model_name_from_record_or_class
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end
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end
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