1 files changed, 28 insertions, 0 deletions
diff --git a/railties/lib/rails/generators/model_helpers.rb b/railties/lib/rails/generators/model_helpers.rb
new file mode 100644
index 0000000000..42c646543e
--- /dev/null
+++ b/railties/lib/rails/generators/model_helpers.rb
@@ -0,0 +1,28 @@
+require 'rails/generators/active_model'
+
+module Rails
+  module Generators
+    module ModelHelpers # :nodoc:
+      PLURAL_MODEL_NAME_WARN_MESSAGE = "[WARNING] The model name '%s' was recognized as a plural, using the singular '%s' instead. " \
+                                       "Override with --force-plural or setup custom inflection rules for this noun before running the generator."
+      mattr_accessor :skip_warn
+
+      def self.included(base) #:nodoc:
+        base.class_option :force_plural, type: :boolean, default: false, desc: 'Forces the use of the given model name'
+      end
+
+      def initialize(args, *_options)
+        super
+        if name == name.pluralize && name.singularize != name.pluralize && !options[:force_plural]
+          singular = name.singularize
+          unless ModelHelpers.skip_warn
+            say PLURAL_MODEL_NAME_WARN_MESSAGE % [name, singular]
+            ModelHelpers.skip_warn = true
+          end
+          name.replace singular
+          assign_names!(name)
+        end
+      end
+    end
+  end
+end