From 1e45818a622405e720a4529795f8be2f11660361 Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Sun, 28 Dec 2008 15:07:17 -0600
Subject: [PATCH] Allow multiple conditions for callbacks [#1627
 state:resolved]

---
 activesupport/lib/active_support/callbacks.rb |  9 +---
 activesupport/test/callbacks_test.rb          | 42 ++++++++++++++++++-
 2 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index 992827f7f4d5b..86e66e05883d5 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -192,13 +192,8 @@ def evaluate_method(method, *args, &block)
         end
 
         def should_run_callback?(*args)
-          if options[:if]
-            evaluate_method(options[:if], *args)
-          elsif options[:unless]
-            !evaluate_method(options[:unless], *args)
-          else
-            true
-          end
+          [options[:if]].flatten.compact.all? { |a| evaluate_method(a, *args) } &&
+          ![options[:unless]].flatten.compact.any? { |a| evaluate_method(a, *args) }
         end
     end
 
diff --git a/activesupport/test/callbacks_test.rb b/activesupport/test/callbacks_test.rb
index 25b8eecef59fd..2bc2e1eaf06d2 100644
--- a/activesupport/test/callbacks_test.rb
+++ b/activesupport/test/callbacks_test.rb
@@ -53,10 +53,41 @@ def save
 end
 
 class ConditionalPerson < Record
+  # proc
   before_save Proc.new { |r| r.history << [:before_save, :proc] }, :if => Proc.new { |r| true }
   before_save Proc.new { |r| r.history << "b00m" }, :if => Proc.new { |r| false }
   before_save Proc.new { |r| r.history << [:before_save, :proc] }, :unless => Proc.new { |r| false }
   before_save Proc.new { |r| r.history << "b00m" }, :unless => Proc.new { |r| true }
+  # symbol
+  before_save Proc.new { |r| r.history << [:before_save, :symbol] }, :if => :yes
+  before_save Proc.new { |r| r.history << "b00m" }, :if => :no
+  before_save Proc.new { |r| r.history << [:before_save, :symbol] }, :unless => :no
+  before_save Proc.new { |r| r.history << "b00m" }, :unless => :yes
+  # string
+  before_save Proc.new { |r| r.history << [:before_save, :string] }, :if => 'yes'
+  before_save Proc.new { |r| r.history << "b00m" }, :if => 'no'
+  before_save Proc.new { |r| r.history << [:before_save, :string] }, :unless => 'no'
+  before_save Proc.new { |r| r.history << "b00m" }, :unless => 'yes'
+  # Array with conditions
+  before_save Proc.new { |r| r.history << [:before_save, :symbol_array] }, :if => [:yes, :other_yes]
+  before_save Proc.new { |r| r.history << "b00m" }, :if => [:yes, :no]
+  before_save Proc.new { |r| r.history << [:before_save, :symbol_array] }, :unless => [:no, :other_no]
+  before_save Proc.new { |r| r.history << "b00m" }, :unless => [:yes, :no]
+  # Combined if and unless
+  before_save Proc.new { |r| r.history << [:before_save, :combined_symbol] }, :if => :yes, :unless => :no
+  before_save Proc.new { |r| r.history << "b00m" }, :if => :yes, :unless => :yes
+  # Array with different types of conditions
+  before_save Proc.new { |r| r.history << [:before_save, :symbol_proc_string_array] }, :if => [:yes, Proc.new { |r| true }, 'yes']
+  before_save Proc.new { |r| r.history << "b00m" }, :if => [:yes, Proc.new { |r| true }, 'no']
+  # Array with different types of conditions comibned if and unless
+  before_save Proc.new { |r| r.history << [:before_save, :combined_symbol_proc_string_array] },
+              :if => [:yes, Proc.new { |r| true }, 'yes'], :unless => [:no, 'no']
+  before_save Proc.new { |r| r.history << "b00m" }, :if => [:yes, Proc.new { |r| true }, 'no'], :unless => [:no, 'no']
+
+  def yes; true; end
+  def other_yes; true; end
+  def no; false; end
+  def other_no; false; end
 
   def save
     run_callbacks(:before_save)
@@ -90,7 +121,16 @@ def test_save_conditional_person
     person.save
     assert_equal [
       [:before_save, :proc],
-      [:before_save, :proc]
+      [:before_save, :proc],
+      [:before_save, :symbol],
+      [:before_save, :symbol],
+      [:before_save, :string],
+      [:before_save, :string],
+      [:before_save, :symbol_array],
+      [:before_save, :symbol_array],
+      [:before_save, :combined_symbol],
+      [:before_save, :symbol_proc_string_array],
+      [:before_save, :combined_symbol_proc_string_array]
     ], person.history
   end
 end