在codeigniter中获取数据获取下拉的致命错误

在codeigniter中获取数据对于下拉获取致命错误。在codeigniter中获取数据获取下拉的致命错误

致命错误：调用未定义的方法Blogs_model ::其中（）在C：\ XAMPP \ htdocs中\项目\ ADMIN \程序\型号\ blogs_model.php上线32

博客：

function add() 
{ 
    $data['categorylist']=$this->blogs_model->categories_dropdown(); 
    $data['mainpage']='blogs'; 
    $data['mode']='add'; 
    $this->load->view('templates/template',$data); 
} 

function addblogs() 
{ 
    $this->load->library('form_validation'); 
    $this->form_validation->set_error_delimiters('<br /><span class="error"> ','</span>'); 
    $this->form_validation->set_rules('category_id','Category Name' , 'required'); 
    $this->form_validation->set_rules('blog_title','Blog Title'); 
    $this->form_validation->set_rules('description','Blog Description'); 
    if($this->form_validation->run()== FALSE) 
    { 
    $data['categorylist']=$this->blogs_model->categories_dropdown(); 
    $data['mainpage']='blogs'; 
    $data['mode']='add'; 
    $this->load->view('templates/template',$data); 
    } 
    else 
    { 
     $this -> blogs_model -> insertblogs(); 
     $this->flash->success('<h2>blogs Added Successfully!</h2>'); 
     redirect('blogs'); 
    } 
}

Blogs_model

function categories_dropdown() 
{  
    $this->table = 'category';  
    $this->where('status',1);  
    $categorylist=$this->dropdown('category_id','category_name');  
    return $categorylist; 
}

查看：

<div class="element"> 
    <label for="categoryname"><font color="black">Category Name</font></label> 
    <?php 
      $categorylist['']='--Select Category Name--'; 
      $category_id="id='category_id'"; 
      if($this->input->post('category_id')) $selected=$this->input->post('category_id');else $selected=''; 
      echo form_dropdown('category_id',$categorylist,$selected,$category_id); 
      ?> 
      <?php echo form_error('category_id', '<div class="error">', '</div>'); ?><br/><br/>  
    </div>

来源

2016-10-20 user7047368

很难说没有'Blogs_model'的完整代码，但它似乎是'$ this->这行'where'（'status'，1）; '应该是'$ this-> db-> where（'status'，1）; ' –

@AlexanderPopov在添加$ this-> db后得到此错误为致命错误：调用未定义的方法CI_DB_mysql_driver :: dropdown（） – user7047368

您是否已将'$ this-> db'添加到此行$ categorylist = $ this-> >下拉（ 'CATEGORY_ID'， 'CATEGORY_NAME'）;'？ –

Please update your model as follows. 

    function categories_dropdown() 
    {  

     $this->db->select('category_id','category_name'); 
     $this->db->from('category'); 
     $this->db->where('status',1); 
     $result = $this->db->get(); 
     return $result->result(); 

    }

来源

2016-10-21 06:58:23

在codeigniter中获取数据获取下拉的致命错误

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