Mysql Codeigniter-查看文件-批量从sql检索数据

这是我从模型文件到控制器的响应

array (size=2)
  'wholesale_records' => 
array (size=2)
  0 => 
    object(stdClass)[36]
      public 'id' => string '117' (length=3)
      public 'product_id' => string '60' (length=2)
      public 'usertype' => string 'wholesale' (length=9)
      public 'range' => string '1' (length=1)
      public 'uom' => string '3' (length=1)
      public 'price' => string '1' (length=1)
      public 'vat@' => string '1' (length=1)
      1 => 
    object(stdClass)[37]
      public 'id' => string '119' (length=3)
      public 'product_id' => string '60' (length=2)
      public 'usertype' => string 'wholesale' (length=9)
      public 'range' => string '3' (length=1)
      public 'uom' => string '3' (length=1)
      public 'price' => string '3' (length=1)
      public 'vat@' => string '3' (length=1)
  'wholesale_count' => int 2

但我想在我的输入占位符中显示这些，但显示时出错 这是我的视图文件

<?php
for ( $i = 0; $i < $wholesale['wholesale_count']; $i ++ ) { ?>
    <div class="section row" id="row1" style="margin-bottom:0px;">
        <div class="col-sm-3">
            <div class="form-group">
                <label class="field">
                    <input type="text" name="range1" id="amount"
                           class="gui-input" placeholder="<?php echo $wholesale['wholesale_records'][ $i ]['range']; ?>"
                           required>
                </label>
            </div>
        </div>
    </div>
<?php } ?>

您没有显示控制器或模型，也没有显示您得到的确切错误。在提供帮助方面，所有这些都是非常有用的。我要对这个问题作一个猜测。可能是这条线

placeholder="<?php echo $wholesale['wholesale_records'][ $i ]['range']; ?>"

使用
foreach（…）
通常比为（…）

循环设置

要容易得多。它不仅减少了输入，而且执行速度更快

看起来模型的回归可能比它需要的更复杂。
模型可以简单地以

return $query->result();

应该返回这样的结构

array (size=2)
  0 => 
    object(stdClass)[36]
      public 'id' => string '117' (length=3)
      public 'product_id' => string '60' (length=2)
      public 'usertype' => string 'wholesale' (length=9)
      public 'range' => string '1' (length=1)
      public 'uom' => string '3' (length=1)
      public 'price' => string '1' (length=1)
      public 'vat@' => string '1' (length=1)
      1 => 
    object(stdClass)[37]
      public 'id' => string '119' (length=3)
      public 'product_id' => string '60' (length=2)
      public 'usertype' => string 'wholesale' (length=9)
      public 'range' => string '3' (length=1)
      public 'uom' => string '3' (length=1)
      public 'price' => string '3' (length=1)
      public 'vat@' => string '3' (length=1)

你不需要把回报埋得更深，也不需要“批发计数”。“foreach”呼叫将为您计算计数

然后，控制器可以像这样将模型返回到视图

$data['wholesale'] = $this->your_model->get_wholesale_records();
$this->load->view('your_view', $data);

然后，视图中的前几行将减少为

<?php
foreach($wholesale as $record){ ?>
    //the rest as shown previously


//其余部分如前所示

$data['wholesale'] = $this->your_model->get_wholesale_records();
$this->load->view('your_view', $data);

<?php
foreach($wholesale as $record){ ?>
    //the rest as shown previously