Froze rails gems

[depot.git] / vendor / rails / actionpack / lib / action_controller / record_identifier.rb

diff --git a/vendor/rails/actionpack/lib/action_controller/record_identifier.rb b/vendor/rails/actionpack/lib/action_controller/record_identifier.rb
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+++ b/vendor/rails/actionpack/lib/action_controller/record_identifier.rb
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+module ActionController  
+  # The record identifier encapsulates a number of naming conventions for dealing with records, like Active Records or 
+  # Active Resources or pretty much any other model type that has an id. These patterns are then used to try elevate
+  # the view actions to a higher logical level. Example:
+  #
+  #   # routes
+  #   map.resources :posts
+  #
+  #   # view
+  #   <% div_for(post) do %>     <div id="post_45" class="post">
+  #     <%= post.body %>           What a wonderful world!
+  #   <% end %>                  </div>
+  #
+  #   # controller
+  #   def destroy
+  #     post = Post.find(params[:id])
+  #     post.destroy
+  #
+  #     respond_to do |format|
+  #       format.html { redirect_to(post) } # Calls polymorphic_url(post) which in turn calls post_url(post)
+  #       format.js do
+  #         # Calls: new Effect.fade('post_45');
+  #         render(:update) { |page| page[post].visual_effect(:fade) }
+  #       end
+  #     end
+  #   end
+  #
+  # As the example above shows, you can stop caring to a large extent what the actual id of the post is. You just know
+  # that one is being assigned and that the subsequent calls in redirect_to and the RJS expect that same naming 
+  # convention and allows you to write less code if you follow it.
+  module RecordIdentifier
+    extend self
+
+    JOIN = '_'.freeze
+    NEW = 'new'.freeze
+
+    # Returns plural/singular for a record or class. Example:
+    #
+    #   partial_path(post)                   # => "posts/post"
+    #   partial_path(Person)                 # => "people/person"
+    #   partial_path(Person, "admin/games")  # => "admin/people/person"
+    def partial_path(record_or_class, controller_path = nil)
+      name = model_name_from_record_or_class(record_or_class)
+
+      if controller_path && controller_path.include?("/")
+        "#{File.dirname(controller_path)}/#{name.partial_path}"
+      else
+        name.partial_path
+      end
+    end
+
+    # The DOM class convention is to use the singular form of an object or class. Examples:
+    #
+    #   dom_class(post)   # => "post"
+    #   dom_class(Person) # => "person"
+    #
+    # If you need to address multiple instances of the same class in the same view, you can prefix the dom_class:
+    #
+    #   dom_class(post, :edit)   # => "edit_post"
+    #   dom_class(Person, :edit) # => "edit_person"
+    def dom_class(record_or_class, prefix = nil)
+      singular = singular_class_name(record_or_class)
+      prefix ? "#{prefix}#{JOIN}#{singular}" : singular
+    end
+
+    # The DOM id convention is to use the singular form of an object or class with the id following an underscore.
+    # If no id is found, prefix with "new_" instead. Examples:
+    #
+    #   dom_id(Post.find(45))       # => "post_45"
+    #   dom_id(Post.new)            # => "new_post"
+    #
+    # If you need to address multiple instances of the same class in the same view, you can prefix the dom_id:
+    #
+    #   dom_id(Post.find(45), :edit) # => "edit_post_45"
+    def dom_id(record, prefix = nil) 
+      if record_id = record.id
+        "#{dom_class(record, prefix)}#{JOIN}#{record_id}"
+      else
+        dom_class(record, prefix || NEW)
+      end
+    end
+
+    # Returns the plural class name of a record or class. Examples:
+    #
+    #   plural_class_name(post)             # => "posts"
+    #   plural_class_name(Highrise::Person) # => "highrise_people"
+    def plural_class_name(record_or_class)
+      model_name_from_record_or_class(record_or_class).plural
+    end
+
+    # Returns the singular class name of a record or class. Examples:
+    #
+    #   singular_class_name(post)             # => "post"
+    #   singular_class_name(Highrise::Person) # => "highrise_person"
+    def singular_class_name(record_or_class)
+      model_name_from_record_or_class(record_or_class).singular
+    end
+
+    private
+      def model_name_from_record_or_class(record_or_class)
+        (record_or_class.is_a?(Class) ? record_or_class : record_or_class.class).model_name
+      end
+  end
+end