【发布时间】：2017-04-06 21:29:20
【问题描述】：
我制作了一个获取 2 个表的值的程序。我的意思是我的程序 只获取表的“id”（外键），但它没有显示对应的值编号。
我的桌子：
“cursadas”包括：(id,user_id[是表“usuarios”的列“id”的外键]，subject_id[是表“id”列的外键”材料”]、等级、日期）
“usuarios”包括：（id、用户名、姓名、姓氏、密码、类型、状态、日期）
“材料”包括：（id、career_id、姓名、描述、小时数）
看一下，我的程序显示了这个表：
我的目标是展示这张桌子（绿色的）：
不知道该怎么做，这是我的代码：
我的视图文件（“home”）：
<html>
<head>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<h2 align="center">TABLE:Study</h2>
<input id="busqueda_tabla" type="text">
<table class="table table-hover" align="center" border="1" cellspacing="0" cellpadding="0" width="700" id="tabla_busqueda">
<thead>
<th>id</th>
<th>User</th>
<th>Subject</th>
<th>Grade</th>
<th>Date</th>
<th>Action</th>
</thead>
<tbody>
<?php
if (count($records) > 0 && $records != false) {
foreach($records as $record) {
echo "<tr>
<td>".$record['id']."</td>
<td>".$record['user_id']."</td>
<td>".$record['subject_id']."</td>
<td>".$record['grade']."</td>
<td>".$record['date']."</td>
<td align='center'>
<button type='button' class='btn btn-primary'>EDIT</button></a> |
<button type='button' class='btn btn-danger'>DELETE</button></a>
</tr>";
}
}
?>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>
我的控制器文件（“主页”）
<?php
class Home extends CI_Controller{
public function __construct(){
parent::__construct();
$this->load->model("Crudmodel");
}
public function index(){
# get all data in Study table
$selectStudys = $this->Crudmodel->selectStudys();
foreach ($selectStudys as $key => $study)
{
# get UserNames
$user = $this->Crudmodel->getName($study['user_id']);
#get Subject Names
$subject = $this->Crudmodel->getSubName($study['subject_id']);
#append both NEW VALUES to same array
if(!empty($user[0]['username'])){
$data[$key]['user_id'] = $user[0]['username'];
}else{
$data[$key]['user_id'] = ''; // or anything as your else condition you can use as error handler
}
if(!empty($subject[0]['name'])){
$data[$key]['subject_id'] = $subject[0]['name'];
}else{
$data[$key]["subject_id"] = "";
// or anything you can use as error handler
}
}
$data['records'] = $selectStudys;
$this->load->view('home', $data);
}
}
?>
我的模型文件：
<?php
class Crudmodel extends CI_Model{
public function __construct(){
parent::__construct();
$this->load->database();
}
function selectStudys()
{
$query= $this->db->query("SELECT * FROM cursadas");
if($query->num_rows()>0){
$result = $query->result_array();
}else{
$result = array();
}
return $result;
}
function getName($name)
{
$query= $this->db->query("SELECT username FROM usuarios WHERE id = $name ");
if($query->num_rows()>0){
$result = $query->result_array();
}else{
$result = "";
}
// or anything you can use as error handler
return $result;
}
function getSubName($subject)
{
$query= $this->db->query("SELECT name FROM materias WHERE id = $subject ");
if($query->num_rows()>0){
$result = $query->result_array();
}else{
$result = "";
// or anything you can use as error handler
}
return $result;
}
function CombineResults($subject, $name){
// you can also use this
$query = $this->db->query("SELECT sub.name, user.username FROM materias sub, Users user WHERE sub.id=$subject AND user.id = $name");
if($query->num_rows()>0){
return $query->result();
}else{
return array();
// or anything you can use as error handler
}
}
}
?>
【问题讨论】：
标签： php codeigniter fetch