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

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"提交"时，表单页面就会刷新，数据库没有更新!似乎$this->form_validation->run()总是返回false，但我不知道为什么。

controller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');
        }       
    }

下面是模型中的函数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_view .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>

在这个问题上纠结了好几天，但我仍然不知道是什么问题。任何帮助将非常感激!

我认为发生这种情况是因为您没有设置任何验证规则。控制器代码应该像这样:

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CodeIgniter用户指南;

我有同样的问题，虽然原因不同。我缺少了一个输入字段我正在验证表单，也就是

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;
  }

我在表单中缺少速度输入字段。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使用过很多次的代码，所以我不明白为什么($this->form_validation->run()返回false，这是我以前从未经历过的。

可以进入system/library/Form_validation.php

和

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

将false改为true