How to pass query params in form-data in rails link_to instead of appending it in url?

I have a page which displays the transaction search results and i have a search filter based on one column(Token) upon clicking this the search criteria should be set and the search params should be passed as a form-data in post method. but currently, it is getting appended to the URL. Kindly, help me

_payment_transaction.html.erb

    <div class="block">

  <% if @transactions_exceed_limit %>
    <div class="row">
      <div class="block-title" id="max-fetch-results-message">
        <h4 class="text-primary">Your search returned too many results, so only the first <%=
          TransactionSearchController::MAX_FETCH_SIZE %> results have been displayed.</h4>
      </div>
    </div>
  <% end %>

  <div class="row" style="width:100% !important;">
    <div class="col-md-4">
      <div class="block-title">
        <% if @integratedApi == false %>
          <h3><strong> <%= @transactions.count %> results found</strong></h3>
          <%else %>
        <h3><strong> <%= @total_records %> results found</strong></h3>
          <%end %>
      </div>
    </div>

    <div class="col-md-8">
      <div id="csvButton">
        <%= form_tag(csv_path(params.except('controller', 'action').merge(format: "csv")), method: "post") do %>
          <%= submit_tag "Download CSV", class: 'btn btn--charcoal-ghost', id: 'download_csv' %>
        <% end %>
      </div>
    </div>
  </div>

  <div class="row" style="margin-bottom: 5px">
    <hr class="line">
  </div>
  <div class="row">
    <div class="table-responsive tb-responsive tble-responsive">
      <table class="table table-condensed table-hover" id="search-result-table" style="margin-left:2%">
        <thead>
        <tr>
          <th>Transaction Id</th>
          <th>Order Id</th>
          <th>Store Id</th>
          <th>Transaction Date</th>
          <th>Transaction Type</th>
          <th>Tender Type</th>
          <th>Token</th>
          <th>Amount</th>
          <th>Currency</th>
          <th>Response </br>Code</th>
        </tr>
        </thead>
        <tbody>
        <% if @integratedApi %>

          <% @transactions.each do |transaction| %>
            <tr>
              <td><%= link_to transaction[:paymentTransactionId], details_path(:id=> transaction), {:remote => true, 'data-toggle' => "modal", 'data-target' => '#modal-window'} %></td>
              <td><%= transaction[:paymentSessionId]%></td>
              <td><%= transaction[:storeId]%></td>
              <td><%= transaction[:createTimestamp].in_time_zone(@timezone).strftime('%B %d, %Y - %l:%M %p') %></td>
              <td><%= @transaction_types[transaction[:transactionType]] %></td>
              <td><%= @tenders[transaction[:tenderType]][1] %></td>
              <td><%= link_to transaction[:paymentAcctUniqueId], params.merge(account_id: transaction[:paymentAcctUniqueId], show_results: "true",clickAccount:"Y"), id: "act_id" %></td>
              <td><%= PaymentsHelper.amount_with_currency_symbol transaction[:transactionAmount], transaction[:isoCurrencyCode]%></td>
              <td><%= transaction[:isoCurrencyCode]%></td>
              <td><%=transaction[:responseCode]%></td>
            </tr>
          <% end %>


          <% else %>
          <% @transactions.each do |transaction| %>

            <tr>
              <td><%= link_to transaction['payment_transaction_id'], details_path(payment_transaction_id: transaction['payment_transaction_id']), {:remote => true, 'data-toggle' => "modal", 'data-target' => '#modal-window'} %></td>
              <td><%= transaction['payment_session_id'] %></td>
              <td><%= transaction['store_id'] %></td>
              <td><%= transaction['create_timestamp'].in_time_zone(@timezone).strftime('%B %d, %Y - %l:%M %p') %></td>
              <td><%= @transaction_types[transaction['transaction_type']] %></td>
              <td><%= @tenders[transaction['tender_type']][1] %></td>
              <% if (@tenders[transaction['tender_type']][0]).in?(['PLCC', 'GC', 'CC', 'CBCC']) %>
                <td><%= link_to transaction['payment_acct_unique_id'], params.merge(account_id: transaction['payment_acct_unique_id'], show_results: "true",clickAccount:"Y"), id: "act_id" %></td>
              <% else %>
                <td><%= transaction['payment_acct_unique_id'] %></td>
              <% end %>
              <% if show_settlement_type? %>
                <td><%= PaymentsHelper.settlement_amount_with_currency_symbol transaction['transaction_amount'], transaction['iso_currency_code'],transaction['settlement_type'] %></td>
              <% else %>
                <td><%= PaymentsHelper.amount_with_currency_symbol transaction['transaction_amount'], transaction['iso_currency_code'] %></td>
              <% end %>
              <td><%= transaction['iso_currency_code'] %></td>
              <% if transaction['transaction_status'] == ('F') %>
                <td>Payment Service Error</td>
              <% else %>
                <td><%= transaction['response_code'] %></td>
              <% end %>
          <% end %>
          </tr>
        <% end %>


        </tbody>
      </table>
    </div>
  </div>


  <div id="modal-window" class="modal fade" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"></div>
</div>

Search.html.erb

    <script type="text/javascript">
    pt_default_time_gap = <%= ENV['PAYPTL_TRANSACTION_SEARCH_DEFAULT_TIME_GAP_IN_DAYS']%>;
    pt_max_time_gap = <%= ENV['PAYPTL_TRANSACTION_SEARCH_MAX_TIME_GAP_IN_DAYS']%>;
    pt_max_from_date_time_gap = <%= ENV['PAYPTL_TRANSACTION_SEARCH_MAX_TIME_GAP_FROM_CURRENT_DATE_IN_DAYS']%>;
</script>
<% provide(:title, 'Transaction Search') %>
<div id="load"></div>
<% content_for :sub_header do %>
  <%= form_tag({controller: "transaction_search", action: "search"}, method: "post", style: "margin-bottom: 20px;", id: "search_crit_form") do %>
    <%= render "search_criteria" %>

    <div class="row" id="advanced_filters" style="display:none;">
      <%= render "transaction_search/advance_filters" %>
    </div>
  <% end %>
<% end %>
<div id="contents">
<div class="row" style="margin-bottom:5px;margin-top: 15px" id="search_results">

  <div class="search_results_pane" id="search_results_table">
    <% if @transactions.present? %>
      <%= render partial: "transaction_search/payment_transaction", object: @transactions %>
    <% else %>
      <div class="block">
        <div class="block-title" id="emptyResults">
          <h2 class="text-primary"><strong>No Results </strong> Found</h2>
        </div>
      </div>
    <% end %>
  </div>
</div>
  </div>

transaction_search_controller.rb

   require 'base64'
require 'rest-client'
require 'xmlrpc'
require 'nokogiri'
require 'date'
require 'will_paginate/array'

class TransactionSearchController < ApplicationController
  include PaymentsHelper
  include ApplicationHelper
  protect_from_forgery except: :details
  before_filter :authenticate_user!, :can_view_payments_txns?
  before_action :set_store_and_timezone
  before_action :tenders_and_transaction_types, only: [:search, :details]
  before_action :settlement_status, only: [:details]

  DEFAULT_TIME_GAP_IN_DAYS = "#{ENV['PAYPTL_TRANSACTION_SEARCH_DEFAULT_TIME_GAP_IN_DAYS']}".to_i.freeze
  DATE_FORMAT = '%Y/%m/%d %H:%M'.freeze
  SHOW_MOCK_TRANSACTION = ("#{ENV['PAYPTL_TRANSACTION_SEARCH_EXCLUDE_MOCK_TXS']}" == "true").freeze
  PAYMENTS_URI = "#{ENV['PAYPTL_PAYMENT_SERVICE_PROTECT_PAN_URI']}".freeze
  PAYMENTS_USERNAME = "#{ENV['PAYPTL_PAYMENT_SERVICE_PROTECT_PAN_USERNAME']}".freeze
  PAYMENTS_PASSWORD = "#{ENV['PAYPTL_PAYMENT_SERVICE_PROTECT_PAN_PASSWORD']}".freeze
  MAX_FETCH_SIZE = "#{ENV['PAYPTL_TRANSACTION_MAX_FETCH_SIZE']}".to_i.freeze
  MAX_FETCH_SIZE_CSV = "#{ENV['PAYPTL_TRANSACTION_MAX_FETCH_SIZE_CSV']}".to_i.freeze
  TRANSACTION_SEARCH_REST_API_ENABLED_FLAG = "#{ENV['PAYPTL_TRANSACTION_SEARCH_REST_API_ENABLED_FLAG']}"
  PTF_CLIENT_MANAGEMENT_SERVICE_URL = "#{ENV['PAYPTL_PTF_CLIENT_MANAGEMENT_SERVICE_URL']}"

  def search
    @integratedApi=false
    if TRANSACTION_SEARCH_REST_API_ENABLED_FLAG == 'Y'

      @integratedApi=true
      payload = Hash.new
      if params[:per_page].present?
        @selected_per_page = params[:per_page]
      else
        @selected_per_page = 2000
      end
      params[:page] = params[:page] || 1
      payload['storeIds'] = params[:store_ids]

      params[:start_date] = params[:start_date] || Time.now.utc.to_date.days_ago(DEFAULT_TIME_GAP_IN_DAYS - 1).beginning_of_day.strftime(DATE_FORMAT)
      params[:end_date] = params[:end_date] || Time.now.utc.to_date.end_of_day.strftime(DATE_FORMAT)
      payload['startDate'] = params[:start_date]
      payload['endDate'] = params[:end_date]
      payload['pageNum'] = params[:page]
      payload['perPage'] = @selected_per_page
      payload['paymentSessionId'] = params[:payment_session_id] if params[:payment_session_id].present?
      payload['paymentAcctUniqueId'] = params[:account_id] if params[:account_id].present?
      payload['transactionTypes'] = params[:transaction_types] if params[:transaction_types].present?
      payload['tenderTypes'] = params[:tender_types] if params[:tender_types].present?
      payload['transactionStatuses'] = params[:transaction_statuses] if params[:transaction_statuses].present?
      payload['isoCurrencyCode'] = params[:iso_currency_code] if params[:iso_currency_code].present?
      payload['transactionAmount'] = params[:transaction_amount] if params[:transaction_amount].present?
      @transaction_search_results = get_transaction_search_details(PTF_CLIENT_MANAGEMENT_SERVICE_URL + "/payments/transaction/search", payload)
      if @transaction_search_results.present? && @transaction_search_results.kind_of?(Hash) && @transaction_search_results.has_key?(:transactions)
        @total_records = @transaction_search_results[:totalCount]
        @total_records = @total_records.nil? ? 0 : @total_records.to_i
      @transactions = @transaction_search_results[:transactions]
      end
    else
    if @store_list.empty?
      flash.now[:danger] = 'No Store Mapped'
    end


    params[:per_page] = params[:per_page] || 20
    params[:page] = params[:page] || 1
    params[:start_date] = params[:start_date] || Time.now.utc.to_date.days_ago(DEFAULT_TIME_GAP_IN_DAYS - 1).beginning_of_day.strftime(DATE_FORMAT)
    params[:end_date] = params[:end_date] || Time.now.utc.to_date.end_of_day.strftime(DATE_FORMAT)
    results
    end
  end

  def get_transaction_search_details(rest_url, payload)
    begin
      rest_resource = RestClient::Resource.new(rest_url,ENV['PAYPTL_PTF_CLIENT_MANAGEMENT_SERVICE_USER_NAME'], ENV['PAYPTL_PTF_CLIENT_MANAGEMENT_SERVICE_PASSWORD'])
      Rails.logger.debug("Calling Transaction Search URL:#{rest_url}\n Payload:#{payload.to_json}")
      @transaction_search_response = rest_resource.post payload.to_json, :content_type => 'application/json'
       if @transaction_search_response.code == Rack::Utils::SYMBOL_TO_STATUS_CODE[:ok]
        return JSON.parse(@transaction_search_response, :symbolize_names => true)
      else
        Rails.logger.error("Transaction search return status code #{@transaction_search_response.code} for payload #{payload}")
      end
    rescue => e
      Rails.logger.error(e.message)
      flash.now[:danger] = 'Unable to fetch data, Please try later'
    end
  end

  def results
    start_date = Time.strptime(params[:start_date], DATE_FORMAT).utc.beginning_of_day
    end_date = Time.strptime(params[:end_date], DATE_FORMAT).utc.end_of_day

    condition = Hash.new
    @accountId=params[:account_id]
    condition[:store_id] = @store_for_service
    condition[:payment_session_id] = params[:payment_session_id] if params[:payment_session_id].present?
    condition[:transaction_test_ind] = [0, nil] if !SHOW_MOCK_TRANSACTION
    condition[:transaction_type] = params[:transaction_types] if params[:transaction_types].present?
    condition[:transaction_amount] = params[:transaction_amount] if params[:transaction_amount].present?
    condition[:iso_currency_code] = params[:iso_currency_code] if params[:iso_currency_code].present?
    condition[:tender_type] = params[:tender_types] if params[:tender_types].present?
    condition[:transaction_status] = params[:transaction_statuses] if params[:transaction_statuses].present?
    @page=params[:page]
    if(@accountId!=nil && @accountId!='')
      condition[:payment_acct_unique_id] = @accountId
      if(params[:clickAccount]=='Y')
        @page=1
        params[:clickAccount]='N'
      end
    end
    condition[:transaction_status] = params[:transaction_statuses] if params[:transaction_statuses].present?
    if params[:action] == 'csvexport'
      @transactions_export_csv = PaymentTransactionFlat.where(:create_timestamp => start_date..end_date).where(condition).order(create_timestamp: :desc).limit(MAX_FETCH_SIZE_CSV)
    else
      @transactions = PaymentTransactionFlat.where(:create_timestamp => start_date..end_date).where(condition).order(create_timestamp: :desc).limit(MAX_FETCH_SIZE + 1)
      if @transactions.present?
        @transactions = @transactions.to_a
        if @transactions.count > MAX_FETCH_SIZE
          @transactions = @transactions[0..(MAX_FETCH_SIZE - 1)]
          @transactions_exceed_limit = true
        end

=begin
        @transactions = @transactions.paginate(:per_page => params[:per_page], :page => @page, :total_entries => @transactions.count)
=end
      end
    end
  end

  def details
    @integratedApi=false
    if TRANSACTION_SEARCH_REST_API_ENABLED_FLAG == 'Y'
      @integratedApi=true
    @transaction = params[:id]
      else
    @transaction = PaymentTransactionFlat.transaction_details(params[:payment_transaction_id])
    if @transaction.present?
      @settlement = PaymentTransactionFlat.settlement_transaction(@transaction['payment_transaction_id']).first
      @response_cc_auth = PaymentTransactionFlat.response_cc_auth(@transaction['payment_transaction_id']).first
      if @settlement.present?
        @auth_transaction = PaymentTransactionFlat.authorization_transaction(@settlement['auth_pmt_transaction_id']).first
        @customer_billing_address = PaymentTransactionFlat.customer_billing_address(@settlement['auth_pmt_transaction_id']).first
        @settlement_history = PaymentTransactionFlat.settlement_transaction_history(@settlement['payment_transaction_id'])
      end
    end
    end

  end

  def retrieve_payload(account_number, tender_class)
    builder = Nokogiri::XML::Builder.new do |xml|
      xml.ProtectPanRequest('xmlns' => 'http://api.gsicommerce.com/schema/checkout/1.0') do
        xml.PaymentAccountNumber_ account_number
        xml.TenderClass tender_class
      end
    end

    return builder.to_xml
  end

  def retrieve_account_number(account_number)
    if account_number.present? && account_number =~ /^[0-9]+$/
      rest_client = RestClient::Resource.new(PAYMENTS_URI, PAYMENTS_USERNAME, PAYMENTS_PASSWORD)

      PaymentsHelper::TENDER_CLASS.each do |key, value|
        begin
          response = rest_client.post retrieve_payload(account_number, value), :content_type => 'application/xml'
          parsed_response = Hash.from_xml(response)
          account_number = parsed_response.try(:[], 'ProtectPanReply').try(:[], 'Token') || account_number
          break
        rescue RestClient::RequestFailed
          next
        end
      end
    end
    account_number
  end

  # Code for CSV generation

  # Enable the CSV library
  require 'csv'

  # Action for generating the CSV
  def csvexport
    respond_to do |format|
      format.csv do
        send_data export_to_csv(results),
                  filename: 'transactions.csv',
                  type: 'text/csv; charset=utf-8; header=present',
                  disposition: 'attachment'
      end
    end
  end

  # Method for generating the csv file
  def export_to_csv(records)
    # Header names used in CSV file
    csv_header = ['Transaction Id', 'Order Id', 'Store Id', 'Transaction Date', 'Transaction Type', 'Tender Type', 'Token', 'Amount', 'Currency', 'Response Code']
    CSV.generate do |csv|
      csv << csv_header
      records.each do |record| # Quick fix for CSV download problem to export only specified columns
        csv << [record['payment_transaction_id'], record['payment_session_id'], record['store_id'], record['create_timestamp'].in_time_zone(@timezone).strftime('%B %d, %Y - %l:%M %p'), record['transaction_type'],
                record['tender_type'], record['payment_acct_unique_id'],
                if record['transaction_amount'].to_s.present?
                  record['settlement_type'].to_s.casecmp("C")== 0 ? '-$' +
                record['transaction_amount'].to_s : '$' + record['transaction_amount'].to_s else ' ' end, record['iso_currency_code'],
                record['response_code'] == ('F') ? 'Payment Service Error' : record['response_code']]
      end
    end
  end

  def get_store_timezone
    render json: ActiveSupport::TimeZone.find_tzinfo(get_timezone(@selected_store)), status: :ok
  end

  private

  def set_store_and_timezone
    params[:store_ids] = get_default_store if params[:store_ids].blank?
    @selected_store = params[:store_ids]
    @store_for_service = replace_with_store_mappings(@selected_store, ApplicationHelper::PAYMENTS_SERVICE)
    @timezone = get_timezone @selected_store
    zone_map = JSON.parse((ActiveSupport::TimeZone.find_tzinfo @timezone).to_json)
    @moment_timezone = zone_map['identifier']
  end

  def tenders_and_transaction_types
    @tenders = Rails.cache.fetch(:payment_tenders) {PaymentRecord.tenders}
    @transaction_types = Rails.cache.fetch(:payment_transaction_types) {PaymentRecord.transaction_types}
  end

  def settlement_status
    @settlement_statuses = Rails.cache.fetch(:payment_settlement_statuses) {PaymentRecord.settlement_status}
  end
end