CodeIgniter数据库无所事事
[英]CodeIgniter Nothing happens database
问题描述
Hi I am following a turtorial to learn CodeIgniter on NetTuts . 
你好我下面一个turtorial学习笨的NETTUTS 。
I have one model, one view and one controller involved. 我有一个模型，一个视图和一个控制器。
The Model: 该模型：
class Data_model extends CI_Model{
function getAll(){
$data = array();
$q = $this->db->query("SELECT * FROM data");
if($q->num_row() > 0){
foreach($q->result() as $row){
$data[] = $row;
}
return $data;
}
}
} }
The View: 风景：
<html>
<head>
<title></title>
</head>
<body>
<p>View loaded</p>
<?php
foreach ($rows as $r){
echo '<h1>',$r->title,'</h1>';
}
?>
</body>
The Controller: 控制器：
class Site extends CI_Controller {
function index(){
$this->load->model('data_model');
$data['rows'] = $this->data_model->getAll();
$this->load->view('home');
}
}
The problem is that I don't get an error but just an empty page. 问题是我没有收到错误，而只有一个空白页。 What am I doing wrong? 我究竟做错了什么？ It feels like I am doing everything from the tutorial? 感觉我正在完成本教程中的所有内容？
4 个解决方案
解决方案1
5 2013-09-30 08:20:22
In controller: 在控制器中：
$this->load->view('home', $data);
Suggestion for model: 型号建议：
function getAll(){
$data = array();
$q = $this->db->query("SELECT * FROM data");
if($q->num_row() > 0){
$data = $q->result(); //result_array() will fetch as arrays and not objects
return $data;
}
}
Try this one as it is already given by Paul : 尝试一下Paul已经给出的方法：
echo '<h1>' . $r->title . '</h1>';
Go to your root/index.php and change environment to developing to see the error generated by php. 转到您的root / index.php并更改developing environment以查看php生成的错误。
解决方案2
3 2013-09-30 08:25:35
In the model, 在模型中
$q->num_row()
needs to be changed to 需要更改为
$q->num_rows()
Also, you need to reference the specific column too 另外，您还需要引用特定的列
$data[] = $row->column_name;
In your controller, the commas need to be replaced with periods. 在您的控制器中，逗号需要替换为句点。 Commas aren't proper syntax 逗号不是正确的语法
foreach ($rows as $r) {
echo '<h1>'.$r->title.'</h1>';
}
Finally, you need to pass the $data variable to the view by doing 最后，您需要执行以下操作将$ data变量传递给视图
$this->load->view('home', $data);
解决方案3
2 2013-09-30 08:23:40
另外，我认为您必须在视图中进行以下更改：
echo '<h1>' . $r->title . '</h1>';
解决方案4
0 已采纳 2013-09-30 09:38:26
This does work: 这确实有效：
class Data_model extends CI_Model{
function getAll(){
$data = array();
$q = $this->db->query("SELECT * FROM data");
$data= $q->result(); //result_array() will fetch as arrays and not objects
return $data;
}
}
But this dosn't: 但这不是：
class Data_model extends CI_Model{
function getAll(){
$data = array();
$q = $this->db->query("SELECT * FROM data");
if($q->num_row() > 0){
$data= $q->result(); //result_array() will fetch as arrays and not objects
return $data;
}
}
}
But why is this the case, and is this even correct to do (is this even an answer), what consequences could be meet by removing this IF statement? 但是，为什么会这样呢？这样做是否正确（这甚至是一个答案），删除此IF语句可能会带来什么后果？
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