Add Base#to_param to Active Resource that quacks like ActiveRecord. Closes #9557 [bradediger]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7764 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

2 files changed, 12 insertions, 0 deletions

diff --git a/activeresource/lib/active_resource/base.rb b/activeresource/lib/active_resource/base.rb
index 9fb347d2c3..b1a79731b9 100644
--- a/activeresource/lib/active_resource/base.rb
+++ b/activeresource/lib/active_resource/base.rb
@@ -550,6 +550,11 @@ module ActiveResource
       attributes[self.class.primary_key] = id
     end
 
+    # Allows ActiveResource objects to be used as parameters in ActionPack URL generation.
+    def to_param
+      id && id.to_s
+    end
+
     # Test for equality.  Resource are equal if and only if +other+ is the same object or 
     # is an instance of the same class, is not +new?+, and has the same +id+.
     #
diff --git a/activeresource/test/base_test.rb b/activeresource/test/base_test.rb
index f97b08295a..89bc28deda 100644
--- a/activeresource/test/base_test.rb
+++ b/activeresource/test/base_test.rb
@@ -444,4 +444,11 @@ class BaseTest < Test::Unit::TestCase
     assert xml.include?('<name>Matz</name>')
     assert xml.include?('<id type="integer">1</id>')
   end
+
+  def test_to_param_quacks_like_active_record
+    new_person = Person.new
+    assert_nil new_person.to_param
+    matz = Person.find(1)
+    assert_equal '1', matz.to_param
+  end
 end