3 files changed, 14 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb
index b6852bfc71..1bffe89875 100644
--- a/activerecord/lib/active_record/callbacks.rb
+++ b/activerecord/lib/active_record/callbacks.rb
@@ -318,7 +318,7 @@ module ActiveRecord
       _run_touch_callbacks { super }
     end
 
-    def increment!(*, touch: nil) # :nodoc:
+    def increment!(attribute, by = 1, touch: nil) # :nodoc:
       touch ? _run_touch_callbacks { super } : super
     end
 
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 812fecbf32..81ad9ef3a2 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -137,6 +137,14 @@ end_error
       end
     end
 
+    initializer "active_record.define_attribute_methods" do |app|
+      config.after_initialize do
+        ActiveSupport.on_load(:active_record) do
+          descendants.each(&:define_attribute_methods) if app.config.eager_load
+        end
+      end
+    end
+
     initializer "active_record.warn_on_records_fetched_greater_than" do
       if config.active_record.warn_on_records_fetched_greater_than
         ActiveSupport.on_load(:active_record) do
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index 576fd21642..8073cabae6 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -127,6 +127,11 @@ class PersistenceTest < ActiveRecord::TestCase
     assert_operator previously_written_on, :<, topic.written_on
   end
 
+  def test_increment_with_no_arg
+    topic = topics(:first)
+    assert_raises(ArgumentError) { topic.increment! }
+  end
+
   def test_destroy_many
     clients = Client.find([2, 3])