我正在使用 Laravel 8。<section>如果用戶的littlelink_pixiv欄位為空，我試圖顯示一個。我收到錯誤：在 null 上呼叫成員函式 isEmpty()。有誰知道如何解決這一問題？我使用的 IF 條件是：
@if(!$info->littlelink_pixiv->isEmpty())
<section>
<main class="card__wrapper">
</main>
</section>
@endif
用戶控制器.php
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use Auth;
use DB;
use App\Models\User;
use App\Models\Button;
use App\Models\Link;
class UserController extends Controller
{
//Statistics of the number of clicks and links
public function index()
{
$userId = Auth::user()->id;
$littlelink_name = Auth::user()->littlelink_name;
$links = Link::where('user_id', $userId)->select('link')->count();
$clicks = Link::where('user_id', $userId)->sum('click_number');
return view('studio/index', ['littlelink_name' => $littlelink_name, 'links' => $links, 'clicks' => $clicks]);
}
//Show littlelink page. example => http://127.0.0.1:8000/ admin
public function littlelink(request $request)
{
$littlelink_name = $request->littlelink;
$id = User::select('id')->where('littlelink_name', $littlelink_name)->value('id');
if (empty($id)) {
return abort(404);
}
$information = User::select('littlelink_name', 'littlelink_color', 'littlelink_fontcolor', 'littlelink_pixiv', 'littlelink_description')->where('id', $id)->get();
$links = DB::table('links')->join('buttons', 'buttons.id', '=', 'links.button_id')->select('links.link', 'links.id', 'buttons.name')->where('user_id', $id)->orderBy('up_link', 'asc')->get();
return view('littlelink', ['information' => $information, 'links' => $links, 'littlelink_name' => $littlelink_name]);
}
//Show buttons for add link
public function showButtons()
{
$data['buttons'] = Button::select('name')->get();
return view('studio/add-link', $data);
}
//Save add link
public function addLink(request $request)
{
$request->validate([
'link' => 'required|url',
'button' => 'required'
]);
$link = $request->link;
$button = $request->button;
$userId = Auth::user()->id;
$buttonId = Button::select('id')->where('name' , $button)->value('id');
$links = new Link;
$links->link = $link;
$links->user_id = $userId;
$links->button_id = $buttonId;
$links->save();
return back()->with('message', 'Link Added');
}
//Count the number of clicks and redirect to link
public function clickNumber(request $request)
{
$link = $request->link;
$linkId = $request->id;
if(empty($link && $linkId))
{
return abort(404);
}
Link::where('id', $linkId)->increment('click_number', 1);
return redirect()->away($link);
}
//Show link, click number, up link in links page
public function showLinks()
{
$userId = Auth::user()->id;
$data['links'] = Link::select('id', 'link', 'click_number', 'up_link')->where('user_id', $userId)->orderBy('created_at', 'desc')->paginate(10);
return view('studio/links', $data);
}
//Delete link
public function deleteLink(request $request)
{
$linkId = $request->id;
Link::where('id', $linkId)->delete();
return back();
}
//Raise link on the littlelink page
public function upLink(request $request)
{
$linkId = $request->id;
$upLink = $request->up;
if($upLink == 'yes'){
$up = 'no';
}elseif($upLink == 'no'){
$up = 'yes';
}
Link::where('id', $linkId)->update(['up_link' => $up]);
return back();
}
//Show link to edit
public function showLink(request $request)
{
$linkId = $request->id;
$link = Link::where('id', $linkId)->value('link');
$buttons = Button::select('name')->get();
return view('studio/edit-link', ['buttons' => $buttons, 'link' => $link, 'id' => $linkId]);
}
//Save edit link
public function editLink(request $request)
{
$request->validate([
'link' => 'required|url',
'button' => 'required',
]);
$link = $request->link;
$button = $request->button;
$linkId = $request->id;
$buttonId = Button::select('id')->where('name' , $button)->value('id');
Link::where('id', $linkId)->update(['link' => $link, 'button_id' => $buttonId]);
return redirect('/studio/links');
}
//Show littlelinke page for edit
public function showPage(request $request)
{
$userId = Auth::user()->id;
$data['pages'] = User::where('id', $userId)->select('littlelink_name', 'littlelink_color', 'littlelink_fontcolor', 'littlelink_pixiv', 'littlelink_description')->get();
return view('/studio/page', $data);
}
//Save littlelink page (name, description, logo)
public function editPage(request $request)
{
$request->validate([
'image' => 'nullable|mimes:jpeg,jpg,png|max:100',
'pageName' => 'nullable|alpha_dash',
'pageColor' => 'nullable',
'pageFontcolor' => 'nullable',
'pageDescription' => 'nullable|regex:/^[\w.\- ] $/i',
'pagePixiv' => 'nullable|url',
]);
$userId = Auth::user()->id;
$littlelink_name = Auth::user()->littlelink_name;
$profilePhoto = $request->file('image');
$pageName = $request->pageName;
$pageColor = $request->pageColor;
$pageFontcolor = $request->pageFontcolor;
$pageDescription = $request->pageDescription;
$pagePixiv = $request->pagePixiv;
User::where('id', $userId)->update(['littlelink_name' => $pageName, 'littlelink_color' => $pageColor, 'littlelink_fontcolor' => $pageFontcolor, 'littlelink_pixiv' => $pagePixiv, 'littlelink_description' => $pageDescription]);
if(!empty($profilePhoto)){
$profilePhoto->move(public_path('/img'), $littlelink_name . ".png");
}
return back()->with('message', 'Saved');
}
//Show user (name, email, password)
public function showProfile()
{
$userId = Auth::user()->id;
$data['profile'] = User::where('id', $userId)->select('name', 'email')->get();
return view('/studio/profile', $data);
}
//Save user (name, email, password)
public function editProfile(request $request)
{
$request->validate([
'name' => 'required|unique:users',
'email' => 'required|email|unique:users',
'password' => 'required|min:8',
]);
$userId = Auth::user()->id;
$name = $request->name;
$email = $request->email;
$password = Hash::make($request->password);
User::where('id', $userId)->update(['name' => $name, 'email' => $email, 'password' => $password]);
return back();
}
}
littlelink.blade.php
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
@foreach($information as $info)
<style>
body {background-color:<?php echo $info->littlelink_color ?>}
</style>
</head>
<body>
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Page Information
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
<meta charset="utf-8">
<title>{{ $littlelink_name }} ?? {{ config('app.name') }} </title>
<meta name="description" content="Find us online!">
<meta name="author" content="Seth Cottle">
<!-- Mobile Specific Metas
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- FONT
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
<link href="https://fonts.googleapis.com/css?family=Poppins:300,400,500,600,700,800,900" rel="stylesheet">
<!-- CSS
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
<link rel="stylesheet" href="{{ asset('littlelink/css/normalize.css') }}">
<link rel="stylesheet" href="{{ asset('littlelink/css/skeleton-light.css') }}">
<link rel="stylesheet" href="{{ asset('littlelink/css/brands.css') }}">
<!-- Favicon
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
<link rel="icon" type="image/png" href="{{ asset('littlelink/images/avatar.png') }}">
</head>
<body>
<!-- Primary Page Layout
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
<div class="container">
<div class="row">
<div class="column" style="margin-top: 10%">
<!-- Your Image Here -->
@if(file_exists(public_path("img/$littlelink_name" . ".png" )))
<div class="image-cropper">
<img src="{{ asset("img/$littlelink_name" . ".png") }}" srcset="{{ asset("img/$littlelink_name" . "@2x.png 2x") }}" hljs-string">" width="200px" height="200px">
</div>
@else
<div hljs-string">">
<img src="{{ asset('littlelink/images/profiledefault.png') }}">
</div>
@endif
<!-- Your Name -->
<h1>{{ $info->littlelink_name }}</h1>
<!-- Short Bio -->
<p>{{ $info->littlelink_description }}</p>
<!-- Pixiv Info -->
<script>
var apidata = "<?php echo $info->littlelink_pixiv ?>";
var pixid = apidata.replace( /^\D /g, '');
const url = 'https://api.adoreanime.com/api/pixiv/?type=member_illust&id=' pixid '&page=1';
fetchData(url);
function fetchData(url) {
fetch(url).then((response) => response.json()).then(function(data) {
var p = data.illusts.slice(0, 6).map(art => {
var imgSrc = art.image_urls.medium.replace('i.pximg.net', 'img.adoreanime.com');
var nsfw = art.x_restrict ? "blur" : ""
return `<div hljs-string">">
${nsfw && '<span hljs-string">">R-18</span>'}
<div hljs-string">"><a href="https://www.pixiv.net/en/artworks/${art.id}" target="_blank" rel="noopener noreferrer"><img src=${imgSrc} alt="如果laravel中的資料為空，如何顯示內容？"/></a></div>
</div>`
})
var x = document.getElementsByClassName('card__wrapper');
var y = p.join(' ');
x[0].innerHTML = y;
})
}
</script>
@if(!$info->littlelink_pixiv->isEmpty())
<section>
<main class="card__wrapper">
</main>
</section>
@endif
@endforeach
<!-- Buttons -->
@foreach($links as $link)
@php $linkName = str_replace('default ','',$link->name) @endphp
<a class="button button-{{ $link->name }}" href="{{ route('clickNumber') . '/' . $link->id . '/' . $link->link}}" target="_blank"><img hljs-string">" src="{{ asset('\/littlelink/icons\/') . $linkName }}.svg">{{ ucfirst($linkName) }}</a>
<br>
@endforeach
<span hljs-string">">Powered by <img hljs-string">" src="{{ asset('littlelink/images/logo.svg') }}"></span>
</div>
</div>
</div>
<!-- End Document
–––––––––––––––––––––––––––––––––––––––––––––––––– -->
</body>
</html>
</body>
</html>
uj5u.com熱心網友回復：
因為 null 是一個假值：
@if(!$info->littlelink_pixiv)
uj5u.com熱心網友回復：
您可以撰寫此代碼{{ $info->littlelink_pixiv ?? '' }}使刀片模板中的變數成為可選，并在變數具有值時列印該變數
uj5u.com熱心網友回復：
使用它可能對你有用。!$info->littlelink_pixiv == null
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/352656.html
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