putting back acts_as_tree and some methods for pages

Oleg committed Aug 31, 2010

commit 049b80d739eafbdd6a05d367e5c93d70ce9dd6ef

Showing 5 changed files with 145 additions and 11 deletions

app/models/cms_page.rb +23 -4

@@	@@ -1,18 +1,27 @@
	class CmsPage < ActiveRecord::Base

+	acts_as_tree :counter_cache => :children_count
+
	# -- Relationships --------------------------------------------------------
	belongs_to :cms_layout
	has_many :cms_blocks, :dependent => :destroy
	accepts_nested_attributes_for :cms_blocks

+	# -- Callbacks ------------------------------------------------------------
+	before_validation :assign_full_path
+	after_save :sync_child_pages
+
	# -- Validations ----------------------------------------------------------
	validates :label,
-	:presence => true
+	:presence => true
	validates :slug,
-	:presence => true,
-	:format => /^\w[a-z0-9_-]*$/i
+	:presence => true,
+	:format => /^\w[a-z0-9_-]*$/i,
+	:unless => lambda{ \|p\| p == CmsPage.root \|\| CmsPage.count == 0 }
	validates :cms_layout,
-	:presence => true
+	:presence => true
+	validates :full_path,
+	:uniqueness => true

	# -- Instance Methods -----------------------------------------------------
	def render_content
@@	@@ -29,4 +38,14 @@ class CmsPage < ActiveRecord::Base
	CmsTag.initialize_tags(self)
	end

+	protected
+
+	def assign_full_path
+	self.full_path = (self.ancestors.reverse.collect{ \|p\| p.slug }.reject{ \|p\| p.blank? } + [self.slug]).join('/')
+	end
+
+	def sync_child_pages
+	children.each{ \|p\| p.save! } if full_path_changed?
+	end
+
	end

migrate/01_create_cms.rb b/db/migrate/01_create_cms.rb +6 -2

@@	@@ -8,19 +8,22 @@ class CreateCms < ActiveRecord::Migration
	t.text :content
	t.timestamps
	end
-	add_index :cms_layouts, :parent_id
	add_index :cms_layouts, :label

	# -- Pages --------------------------------------------------------------
	create_table :cms_pages do \|t\|
	t.integer :cms_layout_id
+	t.integer :parent_id
	t.string :label
	t.string :slug
	t.string :full_path
	t.text :content
+	t.integer :position, :null => false, :default => 0
+	t.integer :children_count, :null => false, :default => 0
	t.timestamps
	end
	add_index :cms_pages, :full_path
+	add_index :cms_pages, [:parent_id, :position]

	# -- Page Blocks --------------------------------------------------------
	create_table :cms_blocks do \|t\|
@@	@@ -43,7 +46,8 @@ class CreateCms < ActiveRecord::Migration
	t.timestamps
	end
	add_index :cms_snippets, :label, :unique => true
-
+
+	# -- Assets -------------------------------------------------------------
	create_table :cms_assets do \|t\|
	t.string :cms_page_id
	t.string :file_file_name

comfortable_mexican_sofa.rb b/lib/comfortable_mexican_sofa.rb +8 -3

@@	@@ -1,6 +1,11 @@
-	require File.expand_path('comfortable_mexican_sofa/cms_form_builder', File.dirname(__FILE__))
-	require File.expand_path('../app/models/cms_block', File.dirname(__FILE__))
-	require File.expand_path('comfortable_mexican_sofa/cms_tag', File.dirname(__FILE__))
+	%w(
+	comfortable_mexican_sofa/cms_form_builder
+	comfortable_mexican_sofa/cms_acts_as_tree
+	../app/models/cms_block
+	comfortable_mexican_sofa/cms_tag
+	).each do \|path\|
+	require File.expand_path(path, File.dirname(__FILE__))
+	end

	Dir.glob(File.expand_path('comfortable_mexican_sofa/cms_tag/*.rb', File.dirname(__FILE__))).each do \|tag_path\|
	require tag_path

comfortable_mexican_sofa/cms_acts_as_tree.rb b/lib/comfortable_mexican_sofa/cms_acts_as_tree.rb +108 -0

@@	@@ -0,0 +1,108 @@
+	module ActiveRecord
+	module Acts
+	module Tree
+	def self.included(base)
+	base.extend(ClassMethods)
+	end
+
+	# Specify this +acts_as+ extension if you want to model a tree structure by providing a parent association and a children
+	# association. This requires that you have a foreign key column, which by default is called +parent_id+.
+	#
+	# class Category < ActiveRecord::Base
+	# acts_as_tree :order => "name"
+	# end
+	#
+	# Example:
+	# root
+	# \_ child1
+	# \_ subchild1
+	# \_ subchild2
+	#
+	# root = Category.create("name" => "root")
+	# child1 = root.children.create("name" => "child1")
+	# subchild1 = child1.children.create("name" => "subchild1")
+	#
+	# root.parent # => nil
+	# child1.parent # => root
+	# root.children # => [child1]
+	# root.children.first.children.first # => subchild1
+	#
+	# In addition to the parent and children associations, the following instance methods are added to the class
+	# after calling <tt>acts_as_tree</tt>:
+	# * <tt>siblings</tt> - Returns all the children of the parent, excluding the current node (<tt>[subchild2]</tt> when called on <tt>subchild1</tt>)
+	# * <tt>self_and_siblings</tt> - Returns all the children of the parent, including the current node (<tt>[subchild1, subchild2]</tt> when called on <tt>subchild1</tt>)
+	# * <tt>ancestors</tt> - Returns all the ancestors of the current node (<tt>[child1, root]</tt> when called on <tt>subchild2</tt>)
+	# * <tt>root</tt> - Returns the root of the current node (<tt>root</tt> when called on <tt>subchild2</tt>)
+	module ClassMethods
+	# Configuration options are:
+	#
+	# * <tt>foreign_key</tt> - specifies the column name to use for tracking of the tree (default: +parent_id+)
+	# * <tt>order</tt> - makes it possible to sort the children according to this SQL snippet.
+	# * <tt>counter_cache</tt> - keeps a count in a +children_count+ column if set to +true+ (default: +false+).
+	def acts_as_tree(options = {})
+	configuration = { :foreign_key => "parent_id", :order => nil, :counter_cache => nil }
+	configuration.update(options) if options.is_a?(Hash)
+
+	belongs_to :parent, :class_name => name, :foreign_key => configuration[:foreign_key], :counter_cache => configuration[:counter_cache]
+	has_many :children, :class_name => name, :foreign_key => configuration[:foreign_key], :order => configuration[:order], :dependent => :destroy
+
+	class_eval <<-EOV
+	include ActiveRecord::Acts::Tree::InstanceMethods
+
+	def self.roots
+	find(:all, :conditions => "#{configuration[:foreign_key]} IS NULL", :order => #{configuration[:order].nil? ? "nil" : %Q{"#{configuration[:order]}"}})
+	end
+
+	def self.root
+	find(:first, :conditions => "#{configuration[:foreign_key]} IS NULL", :order => #{configuration[:order].nil? ? "nil" : %Q{"#{configuration[:order]}"}})
+	end
+	EOV
+	end
+	end
+
+	module InstanceMethods
+	# Returns list of ancestors, starting from parent until root.
+	#
+	# subchild1.ancestors # => [child1, root]
+	def ancestors
+	node, nodes = self, []
+	nodes << node = node.parent while node.parent
+	nodes
+	end
+
+	# Returns all children and children of children
+	def descendants
+	nodes = []
+	self.children.each do \|c\|
+	nodes << c
+	nodes << c.descendants
+	end
+	nodes.flatten
+	end
+
+	# Returns the root node of the tree.
+	def root
+	node = self
+	node = node.parent while node.parent
+	node
+	end
+
+	# Returns all siblings of the current node.
+	#
+	# subchild1.siblings # => [subchild2]
+	def siblings
+	self_and_siblings - [self]
+	end
+
+	# Returns all siblings and a reference to the current node.
+	#
+	# subchild1.self_and_siblings # => [subchild1, subchild2]
+	def self_and_siblings
+	parent ? parent.children : self.class.roots
+	end
+	end
+	end
+	end
+	end
+
+	ActiveRecord::Base.send :include, ActiveRecord::Acts::Tree
	\ No newline at end of file

comfortable_mexican_sofa/cms_form_builder.rb b/lib/comfortable_mexican_sofa/cms_form_builder.rb +0 -2

@@	@@ -1,5 +1,3 @@
-	require 'action_view/helpers/form_helper'
-
	class CmsFormBuilder < ActionView::Helpers::FormBuilder

	helpers = field_helpers -