controller.rb

def create
  @block_edit = false
  debit_params = BankDebit.new(permitted_params[:bank_debit])
    .attributes.symbolize_keys.merge(user_id: current_user.id)

  Bank.transaction do
    current_user.up_score!(1.3) if current_user.Potencial?
    create_plot_debits!(debit_params)
    create_debits!(debit_params)
    redirect_to cash_path, notice: 'Lançamento realizado com sucesso'
  rescue ActiveRecord::RecordInvalid => exc
    render 'new'
  end
end

private

def create_debits!(debit_params)
  repeat_number, repeat_method = params.values_at(:repeat_number, :repeat_method).map(&:to_i)
  created_debits = []

  repeat_number.times.map do |i|
    i += 1
    duration = repeat_method == 7 ? (i * repeat_method).days : i.months
    description = "#{debit_params[:description]} #{i}/#{repeat_number}"
    paid_at = debit_params[:paid_at].to_datetime + duration
    attributes = { description: description, paid_at: paid_at }
    current_company.bank_debits.create!(debit_params.merge(attributes))
  end
end

def create_plot_debits!(debit_params)
  plots = params[:bank_debit][:plots]
  plots_count = params[:plots_count].to_i
  generated_code = SecureRandom.urlsafe_base64(30)

  attributes_base = debit_params
    .slice(:resoursable_type, :resoursable_id, :provider_id, :date, :cicle,
      :bank_category_id, :observation, :avatar)
    .merge(unificator: generated_code)
  }

  plots.map do |i, plot_attributes|
    bank = Bank.find_by(id: plot_attributes[:bank_id])

    final_debit_attributes = attributes_base.merge(
      plot_attributes.slice(:paid_method, :paid_info, :year_company_id,
        :value, :paid)
    ).merge(
      bank_id: bank.try(:id),
      children: i.to_i != 1,
      description: "#{debit_params[:description]} #{i}/#{plots_count}",
      paid_at: plot_attributes[:date]
    )

    current_company.bank_debits.create!(final_debit_attributes)
  end
end