php 在视图 codeigniter 中调用模型函数
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Calling model function in view codeigniter
提问by adnan kamili
I am new to MVC, I am porting a project written in non-MVC style to MVC, but I am stuck on a problem where it is necessary to call Model function in View.
我是 MVC 的新手，我正在将一个以非 MVC 风格编写的项目移植到 MVC，但我遇到了一个需要在 View 中调用 Model 函数的问题。
Scenario:
设想：
Table1 - Products:
contains product_id, product_nameetc. and for each product there can be multiple versions.
表1 -产品：
包含product_id，product_name等，并为每个产品可以有多个版本。
Table2 - Versions:
contains version_id, version_name, ... , product_idetc.
表 2 -版本：
包含version_id、version_name、 ...product_id等。
Now in the View I am displaying products and under each product heading I have to display version list of that product, in non-MVC style it was pretty simple, I can use the following code snippet in View:
现在在视图中我正在显示产品，在每个产品标题下我必须显示该产品的版本列表，在非 MVC 样式中非常简单，我可以在视图中使用以下代码片段：
foreach ($product as $row)
{
echo $row['product_name'];
if ($main->getVersionList($vresult,$row["product_id"]))
{
foreach ($vresult as $vrow)
{
echo $vrow['version_name'];
}
}
}
Now, I can pass Product array from controller to view but what about each Versionarray which needs to be generated corresponding to each product?
现在，我可以将 Product 数组从控制器传递给视图，但是需要生成对应于每个产品的每个Version数组呢？
Update:
更新：
This is my final working solution (used a map), in controller:
这是我在控制器中的最终工作解决方案（使用地图）：
$this->load->model ( 'product_mod' );
$data ['products'] = $this->product_mod->getProductList ();
$data ['versions'] = array ();
foreach ( $data ['products'] as $product )
{
$data ['versions'] [$product['product_id']] = $this->product_mod->getVersionList ( $product['product_id'] );
}
回答by Hashem Qolami
MVC or not to MVC
MVC 或不 MVC
The first thing I should note is that It is impossible to write classical MVC in PHP. In fact the MVC-like PHP frameworks such as CodeIgniter or Yii implements sort of MVPin which:
我应该注意的第一件事是在 PHP 中编写经典 MVC 是不可能的。事实上，类似 MVC 的 PHP 框架，例如 CodeIgniter 或 Yii 实现了某种MVP，其中：
- view is passive and unaware of model
- presenter (controller) changes state of model, reads information and passes it to view
- 视图是被动的，不知道模型
- 演示者（控制器）改变模型的状态，读取信息并将其传递给视图
Credits to tere?ko
学分泰雷？KO
CodeIgniter Approach
CodeIgniter 方法
However, particularly in CodeIgniter, you have 3 steps:
但是，特别是在 CodeIgniter 中，您有 3 个步骤：
- Create a Modelto query through the database and return the data (as an array or object)
- Create a Controllerto loadand fetch the resultfrom the Model(a method of the Model), and pass the returned data to the view
- Create a Viewand use PHP loops to echo the result out, build the HTML.
- 创建模型以通过数据库查询并返回数据（作为数组或对象）
- 创建一个Controller，用于从Model中加载和获取结果（Model的一个方法），并将返回的数据传递给视图
- 创建一个视图并使用 PHP 循环来回显结果，构建 HTML。
Getting all together
聚在一起
Considering the above approach, you need to fetch the result from the database in your Model:
考虑到上述方法，您需要从模型中的数据库中获取结果：
application/models/product.php
应用程序/模型/product.php
class Product extends CI_Model
{
public function get_product($product_id)
{
$this->db->select('*')->from('products');
$this->db->where('product_id', $product_id);
$this->db->join('versions', 'versions.product_id = products.product_id');
$query=$this->db->get();
return $query->first_row('array');
}
}
Then fetch and pass the result within the Controller:
然后在控制器中获取并传递结果：
application/controllers/products.php
应用程序/控制器/products.php
class Products extends CI_Controller
{
public function view($product_id)
{
$this->load->model('product');
// Fetch the result from the database
$data['product'] = $this->product->get_product($product_id);
// Pass the result to the view
$this->load->view('product_view', $data);
}
}
Finally, use the returned data in the view, to generate the list:
最后，在视图中使用返回的数据，生成列表：
application/views/product_view.php
应用程序/视图/product_view.php
// Use $product to display the product.
print_r($product);
回答by Oguz Kurtcuoglu
You should do mysql query in your model, for example products_model (don't forget to load it)
您应该在模型中执行 mysql 查询，例如 products_model （不要忘记加载它）
Example Query : This is just select * from products
示例查询：这只是从产品中选择 *
public function All_Products()
{
$this->db->select('');
$result = $this->db->get('products')->result_array();
return $result;
}
So as I see , you are foreach guy like me, rather than using mass queries.
所以正如我所看到的，你是像我一样的 foreach 人，而不是使用批量查询。
In your controller you could load $products my your model.
在您的控制器中，您可以加载 $products 我的模型。
$products = $this->products_model->All_Products();
My solution is creating a new array then putting new values in it.Also you need to getVersionList function in your model.
我的解决方案是创建一个新数组，然后在其中放入新值。此外，您还需要在模型中使用 getVersionList 函数。
$newArray = array ();
foreach ( $products as $values ) {
$version = $this->products_model->getVersionList($values['product_id']);
$tmp = array (
'product_id' => $values ['product_id'],
'product_name' => $values ['product_name'],
'version' => $version
);
array_push ( $newArray, $tmp );
}
So add your new array to $data you could have them in your view file.
因此，将您的新数组添加到 $data 中，您可以将它们放在您的视图文件中。
$data ['products'] = $newArray;
Sorry I didnt figure out all your queries but I think its better to teach how to catch fish than giving a fish.
对不起，我没有弄清楚你所有的疑问，但我认为教如何钓鱼比给鱼更好。
回答by Devendra Rajput
Using the below code you can call the model's method in the view file. It's worked for me and is so simple also.
使用以下代码，您可以在视图文件中调用模型的方法。它对我有用，而且也很简单。
$CI =& get_instance();
$CI->model_name->method_name();
