douze2890241475 2013-04-28 02:26
浏览 17


I can create this in PHP, but the same thing in rails won't work:

<div class="col">
    <div class="row">content 1 here</div>
    <div class="row">content 2 here</div>
<div class="col">
    <div class="row">content 3 here</div>

These are all dynamic, so I am trying to generate new columns whenever the col field in the database changes. So, content 1 has a col of 1, content 2, col = 1, content 3 has col = 2. The content moves around so I will be updating the column number in the database via ajax. The problem is how to load all the content boxes and in the right columns. What is the best practice for doing this in Rails? Here is what I would do in PHP (psuedocode)

    // this will be content from database
    $content = $dbdata;
    // start first column
    echo '<div class="col">';
    foreach($content as $thiscontent){
        // output row divs with content
        echo '<div class="row">'.$thiscontent['body'].'</div>';
        if($lastcol == $thiscontent['col']){
             // end col and create new col div
             echo '</div><div class="col">';
        $lastcol = $thiscontent['col'];
    // ends last column
    echo '</div>';

I could just be a noob and going about this the wrong way, so feel free to educate me on how this should be done. Is my database not the way to determine col number? Does rails handle iteration differently than I suspect?

  • 写回答

1条回答 默认 最新

  • doujiaci7976 2013-04-28 06:47

    In rails you could try do this. Put it in a view file:

        // start first column
        <div class="col">
        <% @dbdata.each do |thiscontent| %>
          // output row divs with content
          <div class="row"><%= thiscontent.body %></div>
          <% if !lastcol.nil? and lastcol == thiscontent.col %>
            // end col and create new col div
            </div><div class="col">
          <% end
          lastcol = thiscontent.col
        end %>
        // ends last column

    Note that you should pass @dbdata to a view from the controller

    本回答被题主选为最佳回答 , 对您是否有帮助呢?



    • ¥15 PCL注册的选点等函数如何取消注册
    • ¥15 问一下各位,为什么我用蓝牙直接发送模拟输入的数据,接收端显示乱码呢,米思齐软件上usb串口显示正常的字符串呢?
    • ¥15 Python爬虫程序
    • ¥15 crypto 这种的应该怎么找flag?
    • ¥15 代码已写好,求帮我指出错误,有偿!
    • ¥15 matlab+波形匹配算法
    • ¥15 转录组分析做聚类树图时癌旁组被分到了癌组
    • ¥15 大一Python字典
    • ¥15 multisim电路设计(相关搜索:设计报告)
    • ¥15 PC-lint Plus