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-rw-r--r--actionpack/lib/action_view/helpers/active_model_helper.rb2
-rw-r--r--actionpack/test/template/active_model_helper_test.rb4
2 files changed, 5 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/active_model_helper.rb b/actionpack/lib/action_view/helpers/active_model_helper.rb
index bbe8609e91..f0358b5dbe 100644
--- a/actionpack/lib/action_view/helpers/active_model_helper.rb
+++ b/actionpack/lib/action_view/helpers/active_model_helper.rb
@@ -127,7 +127,7 @@ module ActionView
object = convert_to_model(object)
if (obj = (object.respond_to?(:errors) ? object : instance_variable_get("@#{object}"))) &&
- (errors = obj.errors[method])
+ (errors = obj.errors[method]).presence
content_tag("div",
"#{options[:prepend_text]}#{ERB::Util.h(errors.first)}#{options[:append_text]}".html_safe,
:class => options[:css_class]
diff --git a/actionpack/test/template/active_model_helper_test.rb b/actionpack/test/template/active_model_helper_test.rb
index 71c7d5b621..7a665b00bc 100644
--- a/actionpack/test/template/active_model_helper_test.rb
+++ b/actionpack/test/template/active_model_helper_test.rb
@@ -266,6 +266,10 @@ class ActiveModelHelperTest < ActionView::TestCase
assert_dom_equal "<div class=\"differentError\">beforecan't be emptyafter</div>", error_message_on(:post, :author_name, :css_class => 'differentError', :prepend_text => 'before', :append_text => 'after')
end
+ def test_error_message_on_handles_empty_errors
+ assert_equal "", error_message_on(@post, :tag)
+ end
+
def test_error_messages_for_many_objects
assert_dom_equal %(<div class="errorExplanation" id="errorExplanation"><h2>2 errors prohibited this post from being saved</h2><p>There were problems with the following fields:</p><ul><li>Author name can't be empty</li><li>User email can't be empty</li></ul></div>), error_messages_for("post", "user")