使用select来选择，，，选择就响应真是花了好大的功夫。。。。你妹。。。在controller设置变量来储存选择后的值。。。js中如果select选择为空那么传入的值是””而不是null
selectedIndex的值都是数字，从0开始，而不是option的值
controller
#sdn的网络流量监控
def monitor
@vms = VirtualMachine.owned_by(current_user).select(‘*‘).joins("left join vnets on virtual_machines.vnet_id = vnets.id").where("vnets.net_type = ‘sdn‘")
@switches = [["second","_10seconds"],["minute","_5minutes"],["hour","_hour"],["day","_day"],["week","_week"],["month","_month"],["year","_year"]]
@ccs = [["1","1"],["2","2"],["3","3"],["4","4"],["5","5"],["6","6"],["7","7"],["8","8"],["9","9"],["10","10"]]
@jiange_value = params[:times]
@col_value = params[:col]
@lscol = @col_value.to_i
id_hash = Hash.new
id_hash["_10seconds"] = "1"
id_hash["_5minutes"] = "2"
id_hash["_hour"] = "3"
id_hash["_day"] = "4"
id_hash["_week"] = "5"
id_hash["_month"] = "6"
id_hash["_year"] = "7"
@lsjiange = id_hash[@jiange_value]
End
monitor.html.erb
<%= render partial: ‘vnet_nav_bar‘ %>
<meta charset="utf-8">
<head>
<script>
window.onload = initForm;
function initForm()
{
//alert("<%= @lsjiange %>");
document.getElementById(‘col‘).selectedIndex = <%= @lscol %>
document.getElementById(‘times‘).selectedIndex = <%= @lsjiange %>
document.getElementById("col").onchange = popu;
document.getElementById("times").onchange = popu;
}
function popu()
{
//alert("bb");
var form1 = document.getElementById("idform");
form1.submit();
var c = document.getElementById(‘col‘).selectedIndex;
//alert(c);
}
</script>
</head>
<%= form_tag("monitor",:id => "idform",name: "idform") do |f| %>
<%= select_tag "times", options_for_select(@switches),prompt: "选择间隔>时间" %>
<%= select_tag "col", options_for_select(@ccs), prompt: "选择列数" %>
<%= submit_tag("刷新") %>
<% columns = @col_value.to_i %>
<% if columns == 0 %>
<% columns = 2 %>
<% if columns == 0 %>
<% columns = 2 %>
<% end %>
<% if @jiange_value == "" %>
<% @jiange_value = "_5minutes"%>
<% end %>
<% rows = @vms.size/columns %>
<% unless (@vms.size%columns)==0 %>
<% rows = rows + 1 %>
<% end %>
<% vmid = 0 %>
<center>
<table>
<% for i in 0..rows-1 do %>
<tr>
<% for j in 0..columns-1 do %>
<td>
<% if @jiange_value.nil? %>
<% @jiange_value = ‘_5minutes‘ %>
<% end %>
<%= image_tag("rrdtool/#{@vms[vmid].uuid}#{@jiange_value}.png") %>
<% vmid = vmid + 1 %>
</td>
<% if vmid >= @vms.size %>
<% break %>
<% end %>
<% end %>
</tr>
<% end %>
</table>
</center>
<% end %>
时间： 2025-01-12 08:17:17