2010-08-12 14:43:10 -04:00
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require 'active_support/core_ext/hash/except'
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2010-10-29 07:44:45 -04:00
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require 'active_support/core_ext/module/introspection'
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2009-04-22 20:41:28 -04:00
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2009-06-17 11:37:39 -04:00
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module ActiveModel
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2012-03-26 14:14:53 -04:00
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class Name
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include Comparable
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2012-03-10 17:50:03 -05:00
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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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2012-06-25 11:40:54 -04:00
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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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2013-05-01 20:10:06 -04:00
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:to_str, to: :name
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2011-11-24 09:50:21 -05:00
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2012-06-25 11:40:54 -04:00
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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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2012-03-26 14:14:53 -04:00
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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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2009-12-23 06:28:02 -05:00
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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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2010-06-14 05:19:01 -04:00
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2012-10-21 02:26:01 -04:00
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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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2010-01-16 23:52:33 -05:00
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# class BookCover
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Adds #key and #to_param to the AMo interface
This commit introduces two new methods that every
AMo compliant object must implement. Below are the
default implementations along with the implied
interface contract.
# Returns an Enumerable of all (primary) key
# attributes or nil if new_record? is true
def key
new_record? ? nil : [1]
end
# Returns a string representing the object's key
# suitable for use in URLs, or nil if new_record?
# is true
def to_param
key ? key.first.to_s : nil
end
1) The #key method
Previously rails' record_identifier code, which is
used in the #dom_id helper, relied on calling #id
on the record to provide a reasonable DOM id. Now
with rails3 being all ORM agnostic, it's not safe
anymore to assume that every record ever will have
an #id as its primary key attribute.
Having a #key method available on every AMo object
means that #dom_id can be implemented using
record.to_model.key # instead of
record.id
Using this we're able to take composite primary
keys into account (e.g. available in datamapper)
by implementing #dom_id using a newly added
record_key_for_dom_id(record)
method. The user can overwrite this method to
provide customized versions of the object's key
used in #dom_id.
Also, dealing with more complex keys that can
contain arbitrary strings, means that we need to
make sure that we only provide DOM ids that are
valid according to the spec. For this reason, this
patch sends the key provided through a newly added
sanitize_dom_id(candidate_id)
method, that makes sure we only produce valid HTML
The reason to not just add #dom_id to the AMo
interface was that it feels like providing a DOM
id should not be a model concern. Adding #dom_id
to the AMo interface would force these concern on
the model, while it's better left to be implemented
in a helper.
Now one could say the same is true for #to_param,
and actually I think that it doesn't really fit
into the model either, but it's used in AR and it's
a main part of integrating into the rails router.
This is different from #dom_id which is only used
in view helpers and can be implemented on top of a
semantically more meaningful method like #key.
2) The #to_param method
Since the rails router relies on #to_param to be
present, AR::Base implements it and returns the
id by default, allowing the user to overwrite the
method if desired.
Now with different ORMs integrating into rails,
every ORM railtie needs to implement it's own
#to_param implementation while already providing
code to be AMo compliant. Since the whole point of
AMo compliance seems to be to integrate any ORM
seamlessly into rails, it seems fair that all we
really need to do as another ORM, is to be AMo
compliant. By including #to_param into the official
interface, we can make sure that this code can be
centralized in the various AMo compliance layers,
and not be added separately by every ORM railtie.
3) All specs pass
2010-02-20 02:24:10 -05:00
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# extend ActiveModel::Naming
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# end
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2010-08-14 01:13:00 -04:00
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#
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2014-05-29 11:01:10 -04:00
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# BookCover.model_name.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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def self.extended(base) #:nodoc:
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base.class_eval do
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remove_possible_method(:model_name)
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delegate :model_name, to: :class
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end
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end
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2009-06-17 11:37:39 -04:00
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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
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# include ActiveModel::Model
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# end
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#
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# Person.model_name.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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2010-07-21 04:37:09 -04:00
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2012-06-23 17:58:36 -04:00
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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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2012-06-23 17:58:36 -04:00
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# Returns the singular class name of a record or class.
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2010-07-21 04:37:09 -04:00
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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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2012-06-23 17:58:36 -04:00
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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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2011-12-08 13:52:26 -05:00
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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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2012-07-28 00:16:51 -04:00
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# # For isolated engine:
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2013-11-11 13:53:54 -05:00
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# ActiveModel::Naming.singular_route_key(Blog::Post) # => "post"
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2011-12-08 13:52:26 -05:00
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#
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# # For shared engine:
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# ActiveModel::Naming.singular_route_key(Blog::Post) # => "blog_post"
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2011-12-08 13:52:26 -05:00
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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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2010-09-01 05:02:28 -04:00
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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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2012-07-28 00:16:51 -04:00
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# # For isolated engine:
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2013-11-11 13:53:54 -05:00
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# ActiveModel::Naming.route_key(Blog::Post) # => "posts"
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2010-09-01 05:02:28 -04:00
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#
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2012-07-28 00:16:51 -04:00
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# # For shared engine:
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2013-11-11 13:53:54 -05:00
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# ActiveModel::Naming.route_key(Blog::Post) # => "blog_posts"
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2011-12-08 13:52:26 -05:00
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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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2010-08-31 16:17:42 -04:00
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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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2010-09-01 05:02:28 -04:00
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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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2012-07-28 00:16:51 -04:00
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# # For isolated engine:
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2013-11-11 13:53:54 -05:00
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# ActiveModel::Naming.param_key(Blog::Post) # => "post"
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2010-09-01 05:02:28 -04:00
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#
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2012-07-28 00:16:51 -04:00
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# # For shared engine:
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2013-11-11 13:53:54 -05:00
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# ActiveModel::Naming.param_key(Blog::Post) # => "blog_post"
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2010-08-31 16:17:42 -04:00
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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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2012-08-11 12:33:27 -04:00
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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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2012-08-08 16:40:06 -04:00
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record_or_class.class.model_name
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2010-07-21 04:37:09 -04:00
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end
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2012-08-11 12:33:27 -04:00
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end
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private_class_method :model_name_from_record_or_class
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2008-06-06 06:38:05 -04:00
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end
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end
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