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-rw-r--r--activerecord/lib/active_record/associations/collection_association.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index f2c96e9a2a..4b7591e15c 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -151,6 +151,7 @@ module ActiveRecord
# be chained. Since << flattens its argument list and inserts each record,
# +push+ and +concat+ behave identically.
def concat(*records)
+ records = records.flatten
if owner.new_record?
load_target
concat_records(records)
@@ -549,7 +550,7 @@ module ActiveRecord
def concat_records(records, should_raise = false)
result = true
- records.flatten.each do |record|
+ records.each do |record|
raise_on_type_mismatch!(record)
add_to_target(record) do |rec|
result &&= insert_record(rec, true, should_raise) unless owner.new_record?