Php 如何从codeIgniter 3.x.x中的两个不同表中获取值_Php_Mysql_Codeigniter

Php 如何从codeIgniter 3.x.x中的两个不同表中获取值

php mysql codeigniter

Php 如何从codeIgniter 3.x.x中的两个不同表中获取值,php,mysql,codeigniter,Php,Mysql,Codeigniter,我在这里提出了另一个问题，我被谷歌搜索到了，但没有运气。现在我希望我能在这里找到解决方案。我的问题是我有两个表，图像和类别。图像表如下所示。在此表中，类别图像和图标将仅存储在Image_name列中，其中图标和图像的id将作为外键存储在其他表中类别表如下所示所以我的问题是，我想用类别图像和类别图标显示所有类别名称。但是，当我编写模型查询时，它只获取图像，而不获取图标我的模型查询： public function getAllCatsForAdminPanel(){

我在这里提出了另一个问题，我被谷歌搜索到了，但没有运气。现在我希望我能在这里找到解决方案。我的问题是

我有两个表，图像和类别。图像表如下所示。在此表中，类别图像和图标将仅存储在Image_name列中，其中图标和图像的id将作为外键存储在其他表中

类别表如下所示

所以我的问题是，我想用类别图像和类别图标显示所有类别名称。但是，当我编写模型查询时，它只获取图像，而不获取图标

我的模型查询：

 public function getAllCatsForAdminPanel(){
       //extract($data);

       $this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as imageName');
       $this->db->from('categories');
       $this->db->where('categories.status =', 'a');
       $this->db->join('images', 'images.id = categories.cat_icon', 'left');
       $this->db->join('images as im', 'im.id = categories.cat_image', 'left');

      $query = $this->db->get();

       //$query = $this->db->get('categories');
       //print_r($query);
       if($query->num_rows()>0){
        return $query->result();
       }else{
        return false;
       }
}

我的控制器：

 public function category(){
    logActivity();
    $cats_data['all_cats'] = $this->cat_model->getAllCatsForAdminPanel();
       //print_r($cats_data);
    $this->load->view('admin/category', $cats_data);

}//close category

我的视图代码：

<?php 
            if(count($all_cats) > 0){
              //print_r($all_cats);
              foreach($all_cats as $all_cat){
              ?>  
              <tr>
              <td><?php echo ++$counter; ?></td>
              <td><?php echo $all_cat->cat_name; ?></td>
              <td><?php echo $all_cat->cat_dis_order; ?></td>
              <td><?php echo $all_cat->imageName; ?></td>
              <td><?php echo $all_cat->imageName; ?></td>
              <td>
                <a href="<?php echo base_url('admin/admin/modifyCategory/'.$all_cat->cat_id); ?>"><i class="fa fa-pencil" aria-hidden="true"></i></a>
              </td>
              <td><button class = "btn btn-danger" onclick="deleteCategory(<?php echo $all_cat->cat_id; ?>);"><i class="fa fa-trash" aria-hidden="true"></i></button></td>

              </tr>
            <?php 
                }
              }
              else{
                  echo "no records found";
                }
            ?>


如果我没有弄错，请更新以下行
模型中
$this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as imageName, images.image_label as imageLabel');

鉴于,
<td><?php echo ++$counter; ?></td>
<td><?php echo $all_cat->cat_name; ?></td>
<td><?php echo $all_cat->cat_dis_order; ?></td>
<td><?php echo $all_cat->imageName; ?></td>
<td><?php echo $all_cat->imageLabel; ?></td>

如果我没有弄错，请更新以下行
模型中
$this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as imageName, images.image_label as imageLabel');

鉴于,
<td><?php echo ++$counter; ?></td>
<td><?php echo $all_cat->cat_name; ?></td>
<td><?php echo $all_cat->cat_dis_order; ?></td>
<td><?php echo $all_cat->imageName; ?></td>
<td><?php echo $all_cat->imageLabel; ?></td>


将控制器更改为（您需要从images表的second join中选择图标作为im，我们将其命名为iconName）（请注意，我没有测试它）：
那么在我们看来，我们需要将图标写为iconName:
<?php 
            if(count($all_cats) > 0){
              //print_r($all_cats);
              foreach($all_cats as $all_cat){
              ?>  
              <tr>
              <td><?php echo ++$counter; ?></td>
              <td><?php echo $all_cat->cat_name; ?></td>
              <td><?php echo $all_cat->cat_dis_order; ?></td>
              <td><?php echo $all_cat->imageName; ?></td>
              <td><?php echo $all_cat->iconName; ?></td>
              <td>
                <a href="<?php echo base_url('admin/admin/modifyCategory/'.$all_cat->cat_id); ?>"><i class="fa fa-pencil" aria-hidden="true"></i></a>
              </td>
              <td><button class = "btn btn-danger" onclick="deleteCategory(<?php echo $all_cat->cat_id; ?>);"><i class="fa fa-trash" aria-hidden="true"></i></button></td>

              </tr>
            <?php 
                }
              }
              else{
                  echo "no records found";
                }
            ?>


将控制器更改为（您需要从images表的second join中选择图标为im，我们已将其命名为iconName）（请注意，我尚未对其进行测试）：
那么在我们看来，我们需要将图标写为iconName:
<?php 
            if(count($all_cats) > 0){
              //print_r($all_cats);
              foreach($all_cats as $all_cat){
              ?>  
              <tr>
              <td><?php echo ++$counter; ?></td>
              <td><?php echo $all_cat->cat_name; ?></td>
              <td><?php echo $all_cat->cat_dis_order; ?></td>
              <td><?php echo $all_cat->imageName; ?></td>
              <td><?php echo $all_cat->iconName; ?></td>
              <td>
                <a href="<?php echo base_url('admin/admin/modifyCategory/'.$all_cat->cat_id); ?>"><i class="fa fa-pencil" aria-hidden="true"></i></a>
              </td>
              <td><button class = "btn btn-danger" onclick="deleteCategory(<?php echo $all_cat->cat_id; ?>);"><i class="fa fa-trash" aria-hidden="true"></i></button></td>

              </tr>
            <?php 
                }
              }
              else{
                  echo "no records found";
                }
            ?>


试试这个：
模型修改
$this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as iconName, im.image_name as imageName');

<td><?php echo ++$counter; ?></td>
<td><?php echo $all_cat->cat_name; ?></td>
<td><?php echo $all_cat->cat_dis_order; ?></td>
<td><?php echo $all_cat->imageName; ?></td>
<td><?php echo $all_cat->iconName; ?></td>

视图修改
$this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as iconName, im.image_name as imageName');

<td><?php echo ++$counter; ?></td>
<td><?php echo $all_cat->cat_name; ?></td>
<td><?php echo $all_cat->cat_dis_order; ?></td>
<td><?php echo $all_cat->imageName; ?></td>
<td><?php echo $all_cat->iconName; ?></td>


试试这个：
模型修改
$this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as iconName, im.image_name as imageName');

<td><?php echo ++$counter; ?></td>
<td><?php echo $all_cat->cat_name; ?></td>
<td><?php echo $all_cat->cat_dis_order; ?></td>
<td><?php echo $all_cat->imageName; ?></td>
<td><?php echo $all_cat->iconName; ?></td>

视图修改
$this->db->select('categories.id AS cat_id, categories.cat_name AS cat_name, categories.display_order AS cat_dis_order, images.image_name as iconName, im.image_name as imageName');

<td><?php echo ++$counter; ?></td>
<td><?php echo $all_cat->cat_name; ?></td>
<td><?php echo $all_cat->cat_dis_order; ?></td>
<td><?php echo $all_cat->imageName; ?></td>
<td><?php echo $all_cat->iconName; ?></td>

更换控制器线路：
$this->db->select('
  categories.id AS cat_id,
  categories.cat_name AS cat_name,
  categories.display_order AS cat_dis_order,
  images.image_name as imageName'); 

与
在视图中，请使用此代码：
<?php 
    if(count($all_cats) > 0){
      //print_r($all_cats);
      foreach($all_cats as $all_cat){
      ?>  
      <tr>
      <td><?php echo ++$counter; ?></td>
      <td><?php echo $all_cat->cat_name; ?></td>
      <td><?php echo $all_cat->cat_dis_order; ?></td>
      <td><?php echo $all_cat->cat_image; ?></td>
      <td><?php echo $all_cat->cat_icon; ?></td>
      <td>
        <a href="<?php echo base_url('admin/admin/modifyCategory/'.$all_cat->cat_id); ?>"><i class="fa fa-pencil" aria-hidden="true"></i></a>
      </td>
      <td><button class = "btn btn-danger" onclick="deleteCategory(<?php echo $all_cat->cat_id; ?>);"><i class="fa fa-trash" aria-hidden="true"></i></button></td>

      </tr>
    <?php 
        }
      }
      else{
          echo "no records found";
        }
?>


更换控制器线路：
$this->db->select('
  categories.id AS cat_id,
  categories.cat_name AS cat_name,
  categories.display_order AS cat_dis_order,
  images.image_name as imageName'); 

与
在视图中，请使用此代码：
<?php 
    if(count($all_cats) > 0){
      //print_r($all_cats);
      foreach($all_cats as $all_cat){
      ?>  
      <tr>
      <td><?php echo ++$counter; ?></td>
      <td><?php echo $all_cat->cat_name; ?></td>
      <td><?php echo $all_cat->cat_dis_order; ?></td>
      <td><?php echo $all_cat->cat_image; ?></td>
      <td><?php echo $all_cat->cat_icon; ?></td>
      <td>
        <a href="<?php echo base_url('admin/admin/modifyCategory/'.$all_cat->cat_id); ?>"><i class="fa fa-pencil" aria-hidden="true"></i></a>
      </td>
      <td><button class = "btn btn-danger" onclick="deleteCategory(<?php echo $all_cat->cat_id; ?>);"><i class="fa fa-trash" aria-hidden="true"></i></button></td>

      </tr>
    <?php 
        }
      }
      else{
          echo "no records found";
        }
?>


这是因为td图标中的变量与td图像相同，感谢您的快速响应。我得到了解决方案，这是因为td图标中的变量与td图像相同，感谢您的快速响应。我找到了解决办法