method
replace_records
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Class: CollectionAssociation
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replace_records(new_target, original_target)
private
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# File activerecord/lib/active_record/associations/collection_association.rb, line 405 def replace_records(new_target, original_target) delete(difference(target, new_target)) unless concat(difference(new_target, target)) @target = original_target raise RecordNotSaved, "Failed to replace #{reflection.name} because one or more of the " "new records could not be saved." end target end