php Laravel Blade 如何使用 if 语句为空或空
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Laravel Blade how to use if statement for null or empty
提问by paradox
In the Blade templating engine, how to use "if" to determine null or empty?
在 Blade 模板引擎中，如何使用“if”来确定 null 或 empty？
{{{ Auth::user()->age }}}
{{{ Auth::user()->age }}}
回答by Vishal Wadhawan
You can do it as bellow
你可以这样做
@if (empty(Auth::user()->age))
// your if code
@else
// your else code
@endif
回答by Jorge Arimany
you can also use:
您还可以使用：
{{ Auth::user()->age or 'Age not provided' }}
so you will have more clean blade template
所以你会有更干净的刀片模板
回答by Razi Kallayi
This works for me:
这对我有用：
{ Auth::user()->age ?: 'Age not provided' }}
{ Auth::user()->age ?: 'Age not provided' }}
回答by arthurborges
In my case, as I was using HeidiSQL as a DB Manager, I had to guarantee that the column field was really NULL. To do that, I clicked on the field with the right mouse button, clicked on "Insert value", then on "NULL". (It's the same as Shift+Ctrl+N). In the beginning, I was just entering NULL on the field, which is a String I guess, so it was always "truthy", not NULL. Doing that solved the problem for me, even writing {{ Auth::user()->age }}.
就我而言，当我使用 HeidiSQL 作为数据库管理器时，我必须保证列字段确实为 NULL。为此，我用鼠标右键单击该字段，单击“插入值”，然后单击“NULL”。（它与 Shift+Ctrl+N 相同）。一开始，我只是在字段上输入 NULL，我猜这是一个字符串，所以它总是“真实”，而不是 NULL。这样做为我解决了问题，甚至编写{{ Auth::user()->age }}.
