https://svn.lrde.epita.fr/svn/ranch/trunk Index: ChangeLog from Nicolas Despr�s &lt;nicolas.despres(a)gmail.com&gt; Add the diff method for the system. * web/ranch/app/models/system.rb: Add the diff method. * web/ranch/test/unit/system_test.rb: Test it. app/models/system.rb | 15 +++++++++++++++ test/unit/system_test.rb | 12 ++++++++++++ 2 files changed, 27 insertions(+) Index: web/ranch/test/unit/system_test.rb --- web/ranch/test/unit/system_test.rb (revision 64) +++ web/ranch/test/unit/system_test.rb (working copy) @@ -27,4 +27,16 @@ assert_equal 3, systems.size end + def test_diff + sys1 = systems("ouagadougou1") + sys2 = System.new + sys1.attributes.each do |k, v| + sys2.send("#{k}=", v) + end + assert ! sys1.diff?(sys2) + sys2 = systems("ouagadougou2") + require 'pp' + assert_equal ["cpu_frequency"], sys1.diff(sys2) + end + end Index: web/ranch/app/models/system.rb --- web/ranch/app/models/system.rb (revision 64) +++ web/ranch/app/models/system.rb (working copy) @@ -31,6 +31,21 @@ systems end + def diff(other) + except = %w( info id ) + ret = [] + attributes.each do |k, v| + if not except.include? k and v != other.attributes[k] + ret << k + end + end + ret + end + + def diff?(other) + ! diff(other).empty? + end + protected def validate