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-rw-r--r--activerecord/lib/active_record/associations/preloader.rb8
1 files changed, 3 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/associations/preloader.rb b/activerecord/lib/active_record/associations/preloader.rb
index 5c2ac5b374..a8f94b574d 100644
--- a/activerecord/lib/active_record/associations/preloader.rb
+++ b/activerecord/lib/active_record/associations/preloader.rb
@@ -88,7 +88,6 @@ module ActiveRecord
if records.empty?
[]
else
- records.uniq!
Array.wrap(associations).flat_map { |association|
preloaders_on association, records, preload_scope
}
@@ -99,12 +98,11 @@ module ActiveRecord
# Loads all the given data into +records+ for the +association+.
def preloaders_on(association, records, scope, polymorphic_parent = false)
- case association
- when Hash
+ if association.respond_to?(:to_hash)
preloaders_for_hash(association, records, scope, polymorphic_parent)
- when Symbol
+ elsif association.is_a?(Symbol)
preloaders_for_one(association, records, scope, polymorphic_parent)
- when String
+ elsif association.respond_to?(:to_str)
preloaders_for_one(association.to_sym, records, scope, polymorphic_parent)
else
raise ArgumentError, "#{association.inspect} was not recognized for preload"