1 files changed, 38 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/deprecated_error_methods.rb b/activemodel/lib/active_model/deprecated_error_methods.rb
new file mode 100644
index 0000000000..e0cbd9ba29
--- /dev/null
+++ b/activemodel/lib/active_model/deprecated_error_methods.rb
@@ -0,0 +1,38 @@
+module ActiveModel
+  module DeprecatedErrorMethods
+    def on(attribute)
+      ActiveSupport::Deprecation.warn "Errors#on have been deprecated, use Errors#[] instead"
+      self[attribute]
+    end
+
+    def on_base
+      ActiveSupport::Deprecation.warn "Errors#on_base have been deprecated, use Errors#[:base] instead"
+      on(:base)
+    end
+
+    def add(attribute, msg = Errors.default_error_messages[:invalid])
+      ActiveSupport::Deprecation.warn "Errors#add(attribute, msg) has been deprecated, use Errors#[attribute] << msg instead"
+      self[attribute] << msg
+    end
+
+    def add_to_base(msg)
+      ActiveSupport::Deprecation.warn "Errors#add_to_base(msg) has been deprecated, use Errors#[:base] << msg instead"
+      self[:base] << msg
+    end
+  
+    def invalid?(attribute)
+      ActiveSupport::Deprecation.warn "Errors#invalid?(attribute) has been deprecated, use Errors#[attribute].any? instead"
+      self[attribute].any?
+    end
+
+    def full_messages
+      ActiveSupport::Deprecation.warn "Errors#full_messages has been deprecated, use Errors#to_a instead"
+      to_a
+    end
+
+    def each_full
+      ActiveSupport::Deprecation.warn "Errors#each_full has been deprecated, use Errors#to_a.each instead"
+      to_a.each { |error| yield error }
+    end
+  end
+end
+\ No newline at end of file