From c918fbf14b96319412cb6195e7a8a3229613340c Mon Sep 17 00:00:00 2001
From: Jeremy Kemper <jeremy@bitsweat.net>
Date: Mon, 4 Sep 2006 10:04:23 +0000
Subject: Deep hashes are converted into collections of resources. Class
 attribute writer methods.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4985 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 activeresource/lib/active_resource/base.rb | 60 +++++++++++++++++++++++++-----
 1 file changed, 51 insertions(+), 9 deletions(-)

(limited to 'activeresource/lib')

diff --git a/activeresource/lib/active_resource/base.rb b/activeresource/lib/active_resource/base.rb
index f722be4162..ec6cee19fa 100644
--- a/activeresource/lib/active_resource/base.rb
+++ b/activeresource/lib/active_resource/base.rb
@@ -7,6 +7,8 @@ module ActiveResource
 
       def site=(site)
         @site = site.is_a?(URI) ? site : URI.parse(site)
+        @connection = nil
+        @site
       end
 
       def connection(refresh = false)
@@ -25,25 +27,28 @@ module ActiveResource
       def prefix(options={})
         default = site.path
         default << '/' unless default[-1..-1] == '/'
-        set_prefix default
+        self.prefix = default
         prefix(options)
       end
       
-      def set_prefix(value = '/')
+      def prefix=(value = '/')
         prefix_call = value.gsub(/:\w+/) { |s| "\#{options[#{s}]}" }
         method_decl = %(def self.prefix(options={}) "#{prefix_call}" end)
         eval method_decl
       end
+      alias_method :set_prefix, :prefix=
       
-      def set_element_name(value)
+      def element_name=(value)
         class << self ; attr_reader :element_name ; end
         @element_name = value
       end
+      alias_method :set_element_name, :element_name=
       
-      def set_collection_name(value)
+      def collection_name=(value)
         class << self ; attr_reader :collection_name ; end
         @collection_name = value
       end
+      alias_method :set_collection_name, :collection_name=
 
       def element_path(id, options = {})
         "#{prefix(options)}#{collection_name}/#{id}.xml"
@@ -54,13 +59,14 @@ module ActiveResource
       end
       
       def primary_key
-        set_primary_key 'id'
+        self.primary_key = 'id'
       end
       
-      def set_primary_key(value)
+      def primary_key=(value)
         class << self ; attr_reader :primary_key ; end
         @primary_key = value
       end
+      alias_method :set_primary_key, :primary_key=
       
       # Person.find(1) # => GET /people/1.xml
       # StreetAddress.find(1, :person_id => 1) # => GET /people/1/street_addresses/1.xml
@@ -91,7 +97,8 @@ module ActiveResource
     attr_accessor :prefix_options
     
     def initialize(attributes = {}, prefix_options = {})
-      @attributes     = attributes
+      @attributes = {}
+      self.load attributes
       @prefix_options = prefix_options
     end
 
@@ -114,14 +121,34 @@ module ActiveResource
     def destroy
       connection.delete(self.class.element_path(id, prefix_options)[0..-5])
     end
-    
+
     def to_xml
       attributes.to_xml(:root => self.class.element_name)
     end
 
     # Reloads the attributes of this object from the remote web service.
     def reload
-      @attributes.update(self.class.find(self.id, @prefix_options).instance_variable_get(:@attributes))
+      self.load self.class.find(id, @prefix_options).attributes
+    end
+
+    # Manually load attributes from a hash. Recursively loads collections of
+    # resources.
+    def load(attributes)
+      attributes.each do |key, value|
+        @attributes[key.to_s] =
+          case value
+            when Array
+              resource = find_or_create_resource_for_collection(key)
+              value.map { |attrs| resource.new(attrs) }
+            when Hash
+              resource = find_or_create_resource_for(key)
+              resource.new(value)
+            when ActiveResource::Base
+              value.class.new(value.attributes)
+            else
+              value.dup rescue value
+          end
+      end
       self
     end
 
@@ -140,6 +167,21 @@ module ActiveResource
         end
       end
 
+    private
+      def find_or_create_resource_for_collection(name)
+        find_or_create_resource_for(name.to_s.singularize)
+      end
+
+      def find_or_create_resource_for(name)
+        resource_name = name.to_s.camelize
+        resource_name.constantize
+      rescue NameError
+        resource = self.class.const_set(resource_name, Class.new(ActiveResource::Base))
+        resource.prefix = self.class.prefix
+        resource.site = self.class.site
+        resource
+      end
+
       def method_missing(method_symbol, *arguments)
         method_name = method_symbol.to_s
         
-- 
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