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-rw-r--r--activerecord/lib/active_record/base.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 1e7e939097..ac1aa2df45 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -14,6 +14,7 @@ require "active_support/core_ext/module/introspection"
require "active_support/core_ext/object/duplicable"
require "active_support/core_ext/class/subclasses"
require "active_record/attribute_decorators"
+require "active_record/define_callbacks"
require "active_record/errors"
require "active_record/log_subscriber"
require "active_record/explain_subscriber"
@@ -303,6 +304,7 @@ module ActiveRecord #:nodoc:
include AttributeDecorators
include Locking::Optimistic
include Locking::Pessimistic
+ include DefineCallbacks
include AttributeMethods
include Callbacks
include Timestamp