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poudelmadhav/remove_duplicate.md

Last active April 14, 2020 12:05
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removing duplicates from rails model
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remove_duplicate.md 
models = Model.all.group_by{|model| [model.attr1,model.attr2,model.attr3] }; nil
models.values.each do |duplicates|
  first_one = duplicates.shift
  duplicates.each{|double| double.destroy} # duplicates can now be destroyed
end

Source: Remove duplicate records based on multiple columns?

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