Added Errors#add_on_blank which works like Errors#add_on_empty, but uses Object#blank? instead. CHANGED: validates_presence_of now uses Errors#add_on_blank, which will make " " fail the validation where it didnt before #1309. Added that " " is now also blank? (using strip if available)

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1346 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,9 @@
 *SVN*
 
+* CHANGED: validates_presence_of now uses Errors#add_on_blank, which will make "  " fail the validation where it didn't before #1309
+
+* Added Errors#add_on_blank which works like Errors#add_on_empty, but uses Object#blank? instead
+
 * Added the :if option to all validations that can either use a block or a method pointer to determine whether the validation should be run or not. #1324 [Duane Johnson/jhosteny]. Examples:
 
   Conditional validations such as the following are made possible:

activerecord/lib/active_record/validations.rb

@@ -16,6 +16,7 @@ module ActiveRecord
       :confirmation => "doesn't match confirmation",
       :accepted  => "must be accepted",
       :empty => "can't be empty",
+      :blank => "can't be blank",
       :too_long => "is too long (max is %d characters)", 
       :too_short => "is too short (min is %d characters)", 
       :wrong_length => "is the wrong length (should be %d characters)", 
@@ -44,7 +45,7 @@ module ActiveRecord
       @errors[attribute.to_s] << msg
     end
 
-    # Will add an error message to each of the attributes in +attributes+ that is empty (defined by <tt>attribute_present?</tt>).
+    # Will add an error message to each of the attributes in +attributes+ that is empty.
     def add_on_empty(attributes, msg = @@default_error_messages[:empty])
       for attr in [attributes].flatten
         value = @base.respond_to?(attr.to_s) ? @base.send(attr.to_s) : @base[attr.to_s]
@@ -52,6 +53,14 @@ module ActiveRecord
         add(attr, msg) unless !value.nil? && !is_empty
       end
     end
+    
+    # Will add an error message to each of the attributes in +attributes+ that is blank (using Object#blank?).
+    def add_on_blank(attributes, msg = @@default_error_messages[:blank])
+      for attr in [attributes].flatten
+        value = @base.respond_to?(attr.to_s) ? @base.send(attr.to_s) : @base[attr.to_s]
+        add(attr, msg) if value.blank?
+      end
+    end
 
     # Will add an error message to each of the attributes in +attributes+ that has a length outside of the passed boundary +range+. 
     # If the length is above the boundary, the too_long_msg message will be used. If below, the too_short_msg.
@@ -325,7 +334,7 @@ module ActiveRecord
       # terms_of_service is not nil and by default on save.
       #
       # Configuration options:
-      # * <tt>message</tt> - A custom error message (default is: "can't be empty")
+      # * <tt>message</tt> - A custom error message (default is: "must be accepted")
       # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
       # * <tt>accept</tt> - Specifies value that is considered accepted.  The default value is a string "1", which
       # makes it easy to relate to an HTML checkbox.
@@ -343,16 +352,16 @@ module ActiveRecord
         end
       end
 
-      # Validates that the specified attributes are neither nil nor empty. Happens by default on save.
+      # Validates that the specified attributes are not blank (as defined by Object#blank?). Happens by default on save.
       #
       # Configuration options:
-      # * <tt>message</tt> - A custom error message (default is: "has already been taken")
+      # * <tt>message</tt> - A custom error message (default is: "can't be blank")
       # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
       # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
       # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }).  The
       # method, proc or string should return or evaluate to a true or false value.
       def validates_presence_of(*attr_names)
-        configuration = { :message => ActiveRecord::Errors.default_error_messages[:empty], :on => :save }
+        configuration = { :message => ActiveRecord::Errors.default_error_messages[:blank], :on => :save }
         configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
 
         # can't use validates_each here, because it cannot cope with non-existant attributes,
@@ -360,7 +369,7 @@ module ActiveRecord
         attr_names.each do |attr_name|
           send(validation_method(configuration[:on])) do |record|
             unless configuration[:if] and not evaluate_condition(configuration[:if], record)
-              record.errors.add_on_empty(attr_name,configuration[:message])
+              record.errors.add_on_blank(attr_name,configuration[:message])
             end
           end
         end

activerecord/test/validations_test.rb

@@ -221,11 +221,16 @@ class ValidationsTest < Test::Unit::TestCase
 
     t = Topic.create
     assert !t.save
-    assert_equal "can't be empty", t.errors.on(:title)
-    assert_equal "can't be empty", t.errors.on(:content)
+    assert_equal "can't be blank", t.errors.on(:title)
+    assert_equal "can't be blank", t.errors.on(:content)
 
     t.title = "something"
-    t.content  = "another"
+    t.content  = "   "
+
+    assert !t.save
+    assert_equal "can't be blank", t.errors.on(:content)
+
+    t.content = "like stuff"
 
     assert t.save
   end

activesupport/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Added that "   " is now also blank? (using strip if available)
+
 * Fixed Dependencies so all modules are able to load missing constants #1173 [Nicholas Seckar]
 
 * Fixed the Inflector to underscore strings containing numbers, so Area51Controller becomes area51_controller #1176 [Nicholas Seckar]

activesupport/lib/active_support/core_ext/object_and_class.rb

@@ -12,8 +12,11 @@ class Object #:nodoc:
     subclasses
   end
 
+  # "", "   ", nil, and 0 are all blank
   def blank?
-    if respond_to? :empty?
+    if respond_to?(:empty?) && respond_to?(:strip)
+      strip.empty?
+    elsif respond_to? :empty?
       empty?
     elsif respond_to? :zero?
       zero?