CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil).select{ |cr| cr.created_at == cr.updated_at }.each do |cr|
  cr.granted_at = cr.created_at
  cr.save
end

CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil, rebate_type:"Settlement").each do |cr|
  cr.update!(granted_at: cr.created_at)
end

CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil).last
CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil, rebate_type:"").where.not(installment_month:nil).count
CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil, rebate_type:"").where.not(installment_month:nil).first
CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil, rebate_type:"").where.not(installment_month:nil).last

rebates = CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil, rebate_type:"").where.not(installment_month:nil).each do |cr|
  cr.assign_attributes(granted_at: cr.created_at)
  cr.save!(validate:false)
end; rebates.length

rebate_types =  CashRebate::AD_HOC_REBATE_TYPES + CashRebate::SCHEDULED_REBATE_TYPES + [""]

CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil).where.not(installment_month:nil, rebate_type: rebate_types).count
CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil).where.not(installment_month:nil, rebate_type: rebate_types).first
CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil).where.not(installment_month:nil, rebate_type: rebate_types).last

rebates = CashRebate.where(state:["complete","forfeit","granted"], granted_at:nil).where.not(installment_month:nil, rebate_type: rebate_types).each do |cr|
  cr.assign_attributes(granted_at: cr.created_at)
  cr.save!(validate:false)
end; rebates.length

CashRebate.where(state:["complete"], applied_at:nil).last

CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"Settlement").count
CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"Settlement").first
CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"Settlement").last

rebates = CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"Settlement").each do |cr|
  cr.assign_attributes(applied_at: cr.created_at)
  cr.save!(validate:false)
end; rebates.length

CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"").count
CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"").first
CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"").last

rebates = CashRebate.where(state:["complete"], applied_at:nil, rebate_type:"").each do |cr|
  cr.assign_attributes(applied_at: cr.date_of_processing.to_datetime)
  cr.save!(validate:false)
end; rebates.length