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FrankFang/find_dups.rb

Forked from rob-murray/find_dups.rb
Created November 9, 2017 15:35
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Rails find duplicate records
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find_dups.rb
columns_that_make_record_distinct = [:some_id, :another_name]
distinct_ids = Model.select("MIN(id) as id").group(columns_that_make_record_distinct).map(&:id)
duplicate_records = Model.where.not(id: distinct_ids)
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