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-rw-r--r--activerecord/lib/active_record/relation/predicate_builder.rb12
1 files changed, 12 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/predicate_builder.rb b/activerecord/lib/active_record/relation/predicate_builder.rb
index 88081edae2..1d04e763f6 100644
--- a/activerecord/lib/active_record/relation/predicate_builder.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder.rb
@@ -21,6 +21,18 @@ module ActiveRecord
predicates.flatten
end
+ def self.references(attributes)
+ references = attributes.map do |key, value|
+ if value.is_a?(Hash)
+ key
+ else
+ key = key.to_s
+ key.split('.').first.to_sym if key.include?('.')
+ end
+ end
+ references.compact
+ end
+
private
def self.build(attribute, value)
case value