Laravel 5无法将变量传递给所有视图 [英] Laravel 5 fails to pass variable to all views
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问题描述
我在将变量(数据)传递给所有视图时遇到问题.我创建了BaseController来扩展默认的Laravel控制器,并在那里定义了全局"变量.当我使用BaseController扩展其他控制器时,出现错误,未定义变量.有人知道哪里出问题了吗?
I have a problem with passing variable (data) to all Views. I created BaseController that extends default Laravel controller and "global" variables are defined there. When I extend other controller with BaseController i got error that variable is not defined. Does someone knows where's the problem?
这是代码:
namespace App\Http\Controllers;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Sentry;
use Illuminate\Http\Request;
use View;
class BaseController extends Controller {
public function __construct() {
$obavijesti="Other data";
$izbornici="Some data";
View::share ( 'izbornici', $izbornici );
View::share ( 'obavjesti', $obavjesti );
}
}
class AdminController extends BaseController {
.
.
.
echo '<pre>';var_dump($izbornici);echo '</pre>';//Error pop ups here
.
.
.
}
推荐答案
您在这里做错了什么. view :: share()用于在所有视图而非控制器之间共享一条数据.
You are doing something wrong here. view::share() is used for sharing a piece of data across all views not controller.
namespace App\Http\Controllers;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Sentry;
use Illuminate\Http\Request;
use View;
//If you wish to get these variables in your other controllers you do this:
class BaseController extends Controller {
public $obavijesti="Other data";
public $izbornici="Some data";
public function __construct() {
View::share ( 'izbornici', $this->izbornici );
View::share ( 'obavjesti', $this->obavjesti );
}
}
class AdminController extends BaseController {
//if you have a constructor in other controllers you need call constructor of parent controller (i.e. BaseController) like so:
public function __construct(){
parent::__construct();
}
public function Index(){
echo $this->obavijesti;
}
}
您还可以使用编辑器将变量共享给视图
//1. Create a composer file at app\Composers\AdminComposer.php
//NB: create "app\Composers" if does not exists
//2. Inside AdminComposer.php add this.
<?php namespace App\Composers;
class AdminComposer
{
public function __construct()
{
}
public function compose($view)
{
//Add your variables
$view->with('izbornici', 'Other data')
->with('obavjesti', 'Some other data');
}
}
//3. In you controller do this:
<?php namespace App\Http\Controllers;
//NB: I removed your BaseController because I believe the issue is coming from //there
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Sentry;
use Illuminate\Http\Request;
use View;
class AdminController extends Controller{
public function __construct(){
//Lets use AdminComposer to share variables to adminpage.blade.php view
View::composers([
'App\Composers\AdminComposer' => array('adminpage')
]);
}
public function Index(){
return view('adminpage');
}
}
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