CodeIgniter form_validation->run() 总是返回false？

Question

我是CodeIgniter 的新手，我一直在尝试实现表单提交功能，但是每当我按下“提交”时，表单页面都会刷新并且数据库不会更新！似乎$this->form_validation->run() 总是返回false，但我不知道为什么。

控制器功能如下：

public function write_prof_review($prof_id)
    {
        $this->load->model('Queries');
        // form stuff here
        $this->load->helper('form');
        $this->load->library('form_validation');

        $data['prof_id'] = $prof_id;
        if($this->form_validation->run() == FALSE){
            $this->load->view('create_prof_review', $data);
        }
        else {
            $this->Queries->submit_prof_review($prof_id, $this->USERID);
            $this->load->view('form_submitted');
        }       
    }

这是模型中的函数 submit_prof_review()：

function submit_prof_review($prof_id, $user_id)
    {
        $data = array(
            'course_code' => $this->input->post('course_code'),
            'easiness' => $this->input->post('easiness'),
            'helpfulness' => $this->input->post('helpfulness'),
            'clarity' => $this->input->post('clarity'),
            'comment' => $this->input->post('comment')
        );

    $average = round((($data['easiness'] + $data['helpfulness'] + $data['clarity'])/3),2);
    date_default_timezone_set('Asia/Hong_Kong');
    $date = date('m/d/Y h:i:s a', time());

    $data['average'] = $average;
    $data['date'] = $date;
    $data['course_id'] = 0; 

    return $this->db->insert('review_prof', $data);
}

最后是表单的视图（create_prof_review.php）：

<h2>Write a review</h2>
<?php echo form_open('home/write_prof_review/'.$prof_id); ?>
<h3>Course code
<input type = 'text' name = 'course_code'></h3>
<h3>Easiness
<input type = 'text' name = 'easiness'></h3>
<h3>Helpfulness
<input type = 'text' name = 'helpfulness'></h3>
<h3>Clarity
<input type = 'text' name = 'clarity'></h3>
<h3>Comment</h3>
<textarea name = 'comment' rows = '4' cols = '50'></textarea>
<br>
<input type = 'submit' name = 'submit' value = 'Submit'>
</form>

被困在这个问题上几天了，但我仍然无法弄清楚出了什么问题。任何帮助将不胜感激！

Answer 1

虽然原因不同，但我遇到了同样的问题。我错过了我从表单中验证的输入字段之一，即

private function validate_data(){
        $validate_data = array(

            array(

                'field' => 'steps',
                'label' => 'Steps',
                'rules' => 'trim|required|integer|xss_clean'

            ),

            array(

                'field' => 'pace',
                'label' => 'Pace',
                'rules' => 'trim|required|integer|xss_clean'

            ),

            array(

                'field' => 'speed',
                'label' => 'Speed',
                'rules' => 'trim|required|numeric|xss_clean'

            ),

            array(

                'field' => 'distance',
                'label' => 'Distance',
                'rules' => 'trim|required|numeric|xss_clean'

            )

        );//end array validate_data

        return $validate_data;
  }

我错过了表单中的速度输入字段。我添加了它，问题就解决了。这真的让我很头疼，因为我只是重用了我用过很多次的代码，所以我不明白为什么($this->form_validation->run() 会返回 false，这是我以前从未经历过的。

Answer 2

你可以去system/library/Form_validation.php

在

if (count($this->_config_rules) == 0)
{
return FALSE;
}

把假改成真

Answer 3

我认为这是因为您没有设置任何验证规则。 控制器代码应如下所示：

public function write_prof_review($prof_id)
{
    $this->load->model('Queries');
    // form stuff here
    $this->load->helper('form');
    $this->load->library('form_validation');

    $data['prof_id'] = $prof_id;

    // here it is; I am binding rules 

    $this->form_validation->set_rules('course_code', 'Course Code', 'required');
    $this->form_validation->set_rules('easiness', 'easiness', 'required');
    $this->form_validation->set_rules('helpfulness', 'helpfulness', 'required');

    if($this->form_validation->run() == FALSE) {
        $this->load->view('create_prof_review', $data);
    }
    else {
        $this->Queries->submit_prof_review($prof_id, $this->USERID);
        $this->load->view('form_submitted');
    }
}

请参考the CodeIgniter user guide；它将为您提供有关验证规则的更多信息。