制作一个将接受一堆文本数据和图像上传的表单。
将新项目添加到两个表时不断收到此错误：
错误号：1048
列“id_path”不能为空
插入
thumbnails(id_path,id_data_row) 值 (NULL, 17)文件名：C:\wamp\www\project\system\database\DB_driver.php
行号：330
我想要做的是将文本数据（标题、文本、价格等内容）添加到一个表（数据）中，然后上传一张图片并添加其完整的上传路径（作为缩略图表中的主键）和插入文本数据行的 id（将其与缩略图表中的缩略图链接）到缩略图表中。
由于某种原因，它一直将 NULL 作为缩略图表的完整上传路径传递。
crud.php（控制器）：
function add()
{
//Set validation properties
$this->_set_fields();
//Set common properties
$data['title'] = 'Add new data row';
$data['message'] = '';
$data['action'] = site_url('crud/addDataRow');
$data['link_back'] = anchor('crud/index', 'Back to list', array('class' => 'back'));
//Load the view
$this->load->view('templates/header', $data);
$this->load->view('pages/crud_edit', $data);
$this->load->view('templates/footer');
}
function addDataRow()
{
//Set common properties
$data['title'] = 'Add new data row';
$data['action'] = site_url('crud/addDataRow');
$data['link_back'] = anchor('crud/index/', 'Back to list', array('class' => 'back'));
//Set validation properties
$this->_set_fields();
$this->_set_rules();
//Run validation
if($this->form_validation->run() == FALSE)
{
$data['message'] = '';
}
else
{
//Save the data
$full_file_path = null;
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$path_to_uploads='./uploads';
$config['upload_path'] = $path_to_uploads;
$this->load->library('upload', $config);
//add this
$this->upload->initialize($config);
if (!$this->upload->do_upload()){
$error = $this->upload->display_errors();
echo "<script>alert($error);</script>";
}else{
$upload_data=$this->upload->data();
$file_name=$upload_data['file_name'];
$full_file_path = $path_to_uploads.'/'.$file_name;
}
$data_row = array(
'title' => $this->input->post('title'),
'text' => $this->input->post('text'),
'price' => $this->input->post('price'),
'status' => $this->input->post('status'),
'type' => $this->input->post('type')
);
$id = $this->crud_model->save($data_row);
$thumbnail_row = array(
'id_path' => $full_file_path,
'id_data_row' => $id
);
$this->crud_model->save_thumbnail($thumbnail_row);
//Set form input name="id"
$this->form_validation->id = $id;
//Set user message
$data['message'] = '<div class="success">New data row added!</div>';
}
$this->load->view('templates/header', $data);
$this->load->view('pages/crud_edit', $data);
$this->load->view('templates/footer');
}
crud_model.php（模型）：
//Add new data row
function save($data)
{
$this->db->insert($this->tbl_data, $data);
return $this->db->insert_id();
}
//Add the thumbnail upload path and id of the row in data table to link them
function save_thumbnail($data)
{
$this->db->insert($this->tbl_thumbnails, $data);
return $this->db->insert_id();
}
编辑（html表单代码）：
crud_edit.php （用于添加新项目或更新现有项目的html 表单代码）：
<div id="contentColumn">
<h1><?php echo $title; ?></h1>
<?php echo $message; ?>
<form method="post" action="<?php echo $action; ?>" multipart="multipart">
<div class="data">
<table>
<tr>
<td width="30%">ID</td>
<td>
<input type="text" name="id" disabled="disabled" class="text" value="<?php echo set_value('id'); ?>"/>
<input type="hidden" name="id" value="<?php echo set_value('id',$this->form_data->id); ?>"/>
</td>
</tr>
<tr>
<td valign="top">Title<span style="color:red;">*</span></td>
<td>
<input type="text" name="title" class="text" value="<?php echo set_value('title',$this->form_data->title); ?>"/>
<?php echo form_error('title'); ?>
</td>
</tr>
<tr>
<td valign="top">Text<span style="color:red;">*</span></td>
<td>
<textarea name="text" class="text">
<?php echo set_value('text',$this->form_data->text); ?>
</textarea>
<?php echo form_error('text'); ?>
</td>
</tr>
<tr>
<td valign="top">Price<span style="color:red;">*</span></td>
<td>
<input type="text" name="price" class="text" value="<?php echo set_value('price',$this->form_data->price); ?>"/>
<?php echo form_error('price'); ?>
</td>
</tr>
<tr>
<td valign="top">Thumbnail<span style="color:red;">*</span></td>
<td>
<?php echo form_upload(array('name'=>'thumb', 'type'=>'file', 'accept'=>'image/*'))?>
<!--<input type="file" name="thumb" size="20" />-->
<?php echo form_error('thumb'); ?>
</td>
</tr>
<!--
<tr>
<td valign="top">Images<span style="color:red;">*</span></td>
<td>
<input type="text" name="images" class="text" value="<?php echo set_value('images',$this->form_data->images); ?>"/>
<?php echo form_upload(array('name'=>'images', 'type'=>'file', 'multiple'=>'multiple', 'accept'=>'image/*'))?>
<?php echo form_error('images'); ?>
</td>
</tr>
-->
<tr>
<td valign="top">Status</td>
<td>
<input type="text" name="status" class="text" value="<?php echo set_value('status',$this->form_data->status); ?>"/>
<?php echo form_error('status'); ?>
</td>
</tr>
<tr>
<td valign="top">Type<span style="color:red;">*</span></td>
<td>
<input type="text" name="type" class="text" value="<?php echo set_value('type',$this->form_data->type); ?>"/>
<?php echo form_error('type'); ?>
</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="Save" /></td>
</tr>
</table>
</div>
</form>
<br />
<?php echo $link_back; ?>
</div>