1 files changed, 8 insertions, 6 deletions
diff --git a/activemodel/lib/active_model/validations/acceptance.rb b/activemodel/lib/active_model/validations/acceptance.rb
index 139de16326..ee160fb483 100644
--- a/activemodel/lib/active_model/validations/acceptance.rb
+++ b/activemodel/lib/active_model/validations/acceptance.rb
@@ -3,12 +3,12 @@ module ActiveModel
   module Validations
     class AcceptanceValidator < EachValidator # :nodoc:
       def initialize(options)
-        super({ allow_nil: true, accept: "1" }.merge!(options))
+        super({ allow_nil: true, accept: ["1", true] }.merge!(options))
         setup!(options[:class])
       end
 
       def validate_each(record, attribute, value)
-        unless value == options[:accept]
+        unless acceptable_option?(value)
           record.errors.add(attribute, :accepted, options.except(:accept, :allow_nil))
         end
       end
@@ -20,6 +20,10 @@ module ActiveModel
         klass.send(:attr_reader, *attr_readers)
         klass.send(:attr_writer, *attr_writers)
       end
+
+      def acceptable_option?(value)
+        Array(options[:accept]).include?(value)
+      end
     end
 
     module HelperMethods
@@ -38,8 +42,6 @@ module ActiveModel
       # Configuration options:
       # * <tt>:message</tt> - A custom error message (default is: "must be
       #   accepted").
-      # * <tt>:allow_nil</tt> - Skip validation if attribute is +nil+ (default
-      #   is +true+).
       # * <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. This should be set to +true+ if you are validating
@@ -47,8 +49,8 @@ module ActiveModel
       #   before validation.
       #
       # There is also a list of default options supported by every validator:
-      # +:if+, +:unless+, +:on+ and +:strict+.
-      # See <tt>ActiveModel::Validation#validates</tt> for more information
+      # +:if+, +:unless+, +:on+, +:allow_nil+, +:allow_blank+, and +:strict+.
+      # See <tt>ActiveModel::Validation#validates</tt> for more information.
       def validates_acceptance_of(*attr_names)
         validates_with AcceptanceValidator, _merge_attributes(attr_names)
       end