如何在渲染方法中从动作发送参数？

Question

如何从动作渲染视图中发送参数

#!/usr/bin/perl                                     
use strict;                                         
use threads;                                        
use threads::shared;                                
use Thread::Queue;                                  

my $queue = Thread::Queue->new();                   
my @threads;   
my $thr;
#----------------------------------------create                                
#send work first,and then creat threads, the first thread work earlier.
$queue->enqueue(1..10000);  
foreach (1..5)  
  {                               
     push @threads,threads->create("worker");        
  }                                                   

$queue->end();                      

sub worker 
  {                                        
    while (my @DataElement = $queue->dequeue(100)) 
      {
        my $tid = threads->tid();       
        #open (my $out,">>$tid.txt") or die $!; 
        print  "Threads ID:$tid\t@DataElement\n";           
        #print $out "Threads ID:$tid\t@DataElement\n";
        #close $out;    
      }                                               
  }         

#----------------------------------------cut     
my $thr_num=1;                                     
my $i;
while ($thr_num) 
  {  
    $i++;                                        
    foreach (@threads) #store threads, TRUE even if joined.
      {                            
        $thr_num = threads->list();                  
        print "threads total: $thr_num\n";              
        if ($_->is_running())
          {                     
            sleep 1; #wait                               
            next;                                   
          }                                                                                              
        if ($_->is_joinable()) 
          {                    
            $_->join();                             
          }                                                                                                
        sleep 1;# wait                       
      } 
    print $i,"\n";                                               
  }   

但respond_to do |format| if @donation.save else format.html { render :new,:locals => { :need_id => @need_id }} end end 可访问need_id 我如何通过这个参数？

Answer 1

如果您已在控制器中定义@need_id。它将在相应的视图文件中提供：

查看文件（.html.erb）：

<%= @need_id %>

Answer 2

如果控制器中有@need_id，那么

format.html { render :new,:locals => { :need_id => @need_id }}

你可以做＆lt;％= need_id％＆gt;在视图文件中。