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-rwxr-xr-xactiverecord/lib/active_record/associations.rb29
1 files changed, 27 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index ba7f34d729..a66a6c9a5c 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -3,8 +3,28 @@ require 'active_record/associations/has_many_association'
require 'active_record/associations/has_and_belongs_to_many_association'
require 'active_record/deprecated_associations'
-unless Object.respond_to?(:require_association)
- Object.send(:define_method, :require_association) { |file_name| ActiveRecord::Base.require_association(file_name) }
+
+class << Object #:nodoc:
+ # Make require_association available as a bare method.
+ unless respond_to?(:require_association)
+ def require_association(file_name)
+ ActiveRecord::Base.require_association(file_name)
+ end
+ end
+
+ # Use const_missing to autoload associations so we don't have to
+ # require_association when using single-table inheritance.
+ unless respond_to?(:pre_association_const_missing)
+ alias_method :pre_association_const_missing, :const_missing
+
+ def const_missing(class_id)
+ begin
+ require_association(Inflect.underscore(Inflector.demodulize(class_id.to_s)))
+ rescue LoadError
+ pre_association_const_missing(class_id)
+ end
+ end
+ end
end
module ActiveRecord
@@ -464,6 +484,11 @@ module ActiveRecord
def reset_associations_loaded
self.associations_loaded = []
end
+
+ # Reload all the associations that have already been loaded once.
+ def reload_associations_loaded
+ associations_loaded.each { |file_name| silence_warnings { load("#{file_name}.rb") } }
+ end
private
# Raises an exception if an invalid option has been specified to prevent misspellings from slipping through