laravel 拉拉维尔 | 如何在 JavaScript 中访问会话数组？
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laravel | How to access session array in JavaScript?
提问by Sapnesh Naik
I am passing an array to a view from my controller.
我正在将一个数组从我的控制器传递给一个视图。
Here is the controller function:
这是控制器功能：
$notification = array(
'message' => 'Welcome Admin!',
'alert_type' => 'success',
);
return redirect('/home')->with('notification', $notification);
In my view:
在我看来：
<script>
@if(Session::has('notification'))//this line works as expected
var type = "{{ Session::get('alert_type', 'info') }}";
//but the type var gets assigned with default value(info)
switch(type){
case 'info':
toastr.info("{{ Session::get('message') }}");
break;
case 'warning':
toastr.warning("{{ Session::get('message') }}");
break;
case 'success':
toastr.success("{{ Session::get('message') }}");
break;
case 'error':
toastr.error("{{ Session::get('message') }}");
break;
}
@endif
</script>
as you can see there's clearly something wrong with the way I am trying to access the array value in var type = "{{ Session::get('alert_type', 'info') }}";
正如你所看到的，我试图访问数组值的方式显然有问题 var type = "{{ Session::get('alert_type', 'info') }}";
EDIT- 1: I tried doing
编辑- 1：我试过做
var type = "{{ Session::get('notification')->alert_type, 'info' }}";
switch(type){
case 'info':
toastr.info("{{ Session::get('notification')->message }}");
break;
case 'warning':
toastr.warning("{{ Session::get('notification')->message }}");
break;
case 'success':
toastr.success("{{ Session::get('notification')->message }}");
break;
case 'error':
toastr.error("{{ Session::get('notification')->alert_type }}");
break;
}
but now I get an error saying
但现在我收到一条错误消息
Trying to get property of non-object (View: C:\xampp\htdocs\financetest1\resources\views\layouts\master.blade.php) (View: C:\xampp\htdocs\financetest1\resources\views\layouts\master.blade.php)
试图获取非对象的属性（视图：C:\xampp\htdocs\financetest1\resources\views\layouts\master.blade.php）（视图：C:\xampp\htdocs\financetest1\resources\views\layouts\ master.blade.php)
can anyone please help me with this?
任何人都可以帮我解决这个问题吗？
回答by Marwelln
You should keep your PHP and Javascript code seperated. Use dataattributes in your HTML and fetch the values in your Javascript code instead.
您应该将 PHP 和 Javascript 代码分开。data在您的 HTML 中使用属性并在您的 Javascript 代码中获取值。
For example this HTML code (I use json_encodeto support line breaks):
例如这个 HTML 代码（我json_encode用来支持换行符）：
<body {{ Session::has('notification') ? 'data-notification' : '' }} data-notification-type='{{ Session::get('alert_type', 'info') }}' data-notification-message='{{ json_encode(Session::get('message')) }}'>
// ...
</body>
Then in your JS file:
然后在你的 JS 文件中：
(function(){
// Don't go any further down the script if [data-notification] is not set.
if ( ! document.body.dataset.notification)
return false;
var type = document.body.dataset.notificationType;
switch(type){
case 'info':
toastr.info(JSON.parse(document.body.dataset.notificationMessage));
break;
case 'warning':
toastr.warning(JSON.parse(document.body.dataset.notificationMessage));
break;
case 'success':
toastr.success(JSON.parse(document.body.dataset.notificationMessage));
break;
case 'error':
toastr.error(JSON.parse(document.body.dataset.notificationMessage));
break;
}
})();
You can shorten your JS by doing this:
您可以通过执行以下操作来缩短您的 JS：
(function(){
// Don't go any further down the script if [data-notification] is not set.
if ( ! document.body.dataset.notification)
return false;
var type = document.body.dataset.notificationType;
var types = ['info', 'warning', 'success', 'error'];
// Check if `type` is in our `types` array, otherwise default to info.
toastr[types.indexOf(type) !== -1 ? type : 'info'](JSON.parse(document.body.dataset.notificationMessage));
// toastr['info']('message') is the same as toastr.info('message')
})();
Read more on: HTMLElement.dataset, Conditional (ternary) Operator
阅读更多内容：HTMLElement.dataset，条件（三元）运算符
回答by milo526
Instead of {{ Session::get('message') }}
代替 {{ Session::get('message') }}
try {{ Session::get('notification')->message }}and { Session::get('notification')->alert_type }}respectively.
分别尝试{{ Session::get('notification')->message }}和{ Session::get('notification')->alert_type }}。
Your session message returns the array, you will need to use the array keys to get the message not the keys directly.
您的会话消息返回数组，您需要使用数组键来获取消息而不是直接获取键。
回答by Sapnesh Naik
Okay after taking hints from @milo526 answer I did some more research and found the solution. @milo526's solution tries to access the array as an object so Laravel quacked. I did this and it works now!
好的，在从@milo526 答案中得到提示后，我做了更多研究并找到了解决方案。@milo526 的解决方案试图将数组作为对象访问，因此 Laravel 嘎嘎叫。我这样做了，现在可以使用了！
var type = "{{ Session::get('notification')['alert_type'], 'info' }}";
switch(type){
case 'info':
toastr.info("{{ Session::get('notification')['message'] }}");
break;
case 'warning':
toastr.warning("{{ Session::get('notification')['message'] }}");
break;
case 'success':
toastr.success("{{ Session::get('notification')['message'] }}");
break;
case 'error':
toastr.error("{{ Session::get('notification')['message'] }}");
break;
}
