如何在一个查询中使用codeigniter更新数据库中的多行

Question

我只想问如何在一个查询中更新多行。我只能使用insert_batch函数在一行中插入多个数据，但我无法在更新批处理中找到它。我不知道该怎么做。我已经搜索了谷歌如何使它，但我没有运气。非常感谢您的回答。

我有两个表'问卷调查'和'选择'

表信息。为问卷表

-questionnaire_id

-type_id_fk

-question

-answer

表信息。为选择表

-choices_id

-questionnaire_id_fk

-choices

我的控制器

public function update_selectedQuestionnaire() { 
     $this->test_model->update_questionnaire(); 
     redirect('test/questionnaire', 'refresh'); 
} 

我的模型

function update_questionnaire() { 

      $Qid = $this->input->post('Qid'); //questionnaire id 
      $Cid = $this->input->post('Cid'); //questionnaire id 
      $type = $this->input->post('type'); 
      $question = $this->db->escape_like_str($this->input->post('question')); 
      $answer = $this->db->escape_like_str($this->input->post('answer')); 

      $choice1 = $this->db->escape_like_str($this->input->post('choice1')); 
      $choice2 = $this->db->escape_like_str($this->input->post('choice2')); 
      $choice3 = $this->db->escape_like_str($this->input->post('choice3')); 
      $choice4 = $this->db->escape_like_str($this->input->post('choice4')); 


     $Cdata = array(
      array(
       'choices_id' => $Cid, 
       'questionnaire_id_fk' => $Qid, 
       'choices' => $choice1 
      ), 
      array(
       'choices_id' => $Cid, 
       'questionnaire_id_fk' => $Qid, 
       'choices' => $choice2 
      ), 
      array(
       'choices_id' => $Cid, 
       'questionnaire_id_fk' => $Qid, 
       'choices' => $choice3 
      ), 
      array(
       'choices_id' => $Cid, 
       'questionnaire_id_fk' => $Qid, 
       'choices' => $choice4 
      ) 
     ); 

     $this->db->trans_start(); 
     $this->db->query("UPDATE questionnaire SET type_id_fk=$type, question='$question', answer='$answer' WHERE questionnaire_id=$Qid"); 
     $this->db->update_batch('choices', $Cdata, 'choices_id'); 
     var_dump($Cdata); 
     $this->db->trans_complete(); 

    } 

我的观点

<div class="jumbotron"> 
     <div class=" col-md-9 col-sm-12 col-xs-12 panel-body"> 
      <h3>Update Questionnaire</h3> 
      <?php echo form_open('test/update_selectedQuestionnaire'); ?> 
      <?php 
      foreach ($query as $row): echo '<input type="hidden" name="Qid" id="Qid" value="' . $row->questionnaire_id . '"/><br />'; 
      endforeach; 
      foreach ($choices as $row): echo '<input type="hidden" name="Cid" id="Cid" value="' . $row->choices_id . '"/>'; 
      endforeach; 
      ?> 
      <div class="col-md-2 col-sm-2"><label>Type:</label></div><div class="col-md-10"> 
       <?php 
       echo '<select name="type" id="type" required class="form-control">'; 
       echo '<option value=""></option>'; 
       foreach ($type as $tRow): 
        echo '<option value="' . $tRow->type_id . '"'; 
        foreach ($query as $qRow): 
         if ($tRow->type_id === $qRow->type_id_fk): 
          echo 'selected'; 
         endif; 
        endforeach; 
        echo '>' . $tRow->type . '</option>'; 
       endforeach; 
       echo '</select>'; 
       ?> 
      </div> 
      <div class="col-md-2 col-sm-2"><label>Question:</label></div><div class="col-md-10"> 
       <?php 
       foreach ($query as $row): echo '<input type="text" name="question" id="question" value="' . $row->question . '" required class="form-control"/>'; 
       endforeach; 
       ?> 
      </div> 
      <div class="jumbotron"> 

       <?php 
       $i = 0; 
       foreach ($choices as $row): $i++; 
        echo '<div class="col-md-2 col-sm-2"><label>Choice ' . $i . ':</label></div><div class="col-md-9"><div class="col-md-11 col-sm-11 col-xs-11">' 
        . '<input type="text" name="choices" id="choice_' . $row->choices_id . '" value="' . $row->choices . '" class="form-control"/>' 
        . '</div><div class="col-md-1 col-sm-1 col-xs-1"><a class="label label-warning" hef="#" id="setAns_' . $row->choices_id . '">set</a></div></div>'; 
       endforeach; 
       ?> 
       <div class="col-md-2 col-sm-2"><label>Answer:</label></div><div class="col-md-10"> 
        <?php 
        foreach ($query as $row): echo '<input type="text" name="answer" id="answer" value="' . $row->answer . '" required class="form-control" readonly/>'; 
        endforeach; 
        ?> 
       </div> 
      </div> 
     </div> 
     <div class="panel-body"> 
      <div class="text-center col-md-9 col-sm-12 col-xs-12"> 
       <hr /> 
       <button type="button" onclick="goBack()" class="btn btn-default">Cancel</button> 
       <button type="submit" name="update" class="btn btn-primary">Update</button> 
      </div> 
     </div> 
     <?php form_close(); ?> 
    </div> 

Answer 1

对于多次更新，你可以使用$this->db->update_batch

 $Cdata = array(
       array(
        'choices_id' => $Cid, 
        'questionnaire_id_fk' => $Qid, 
        'choices' => $choice1 
       ), 
       array(
        'choices_id' => $Cid, 
        'questionnaire_id_fk' => $Qid, 
        'choices' => $choice2 
       ), 
       array(
        'choices_id' => $Cid, 
        'questionnaire_id_fk' => $Qid, 
        'choices' => $choice3 
       ), 
       array(
        'choices_id' => $Cid, 
        'questionnaire_id_fk' => $Qid, 
        'choices' => $choice4 
       ) 
      ); 

$this->db->update_batch('choices', $Cdata, 'choices_id');