我有一個(gè)書籍表和一個(gè)圖像表，將來我還將有一個(gè)博客表。這就是為什么我想在書籍、博客和圖像表之間創(chuàng)建多態(tài)關(guān)系。但我的問題是，當(dāng)我厭倦了從關(guān)系中檢索圖書圖像 url 的數(shù)據(jù)時(shí)，home.blade.php我@foreach得到了以下結(jié)果：Call to a member function getImage() on null (View: F:\xampp\htdocs\BookReader\resources\views\Main_pages\includes\Home\new_product.blade.php) 代碼如下：home.blade.php@extends('Main_pages.app')@section('title','Home')@section('content') @include('Main_pages.includes.Home.new_product') @include('Main_pages.includes.Home.testimonial') @include('Main_pages.includes.Home.popular_products') @include('Main_pages.includes.Home.news_letter') @include('Main_pages.includes.Home.blogs') @include('Main_pages.includes.Home.quick_view')@endsectionnew_product.blade.php<section class="wn__product__area brown--color pt--80 pb--30"><div class="container"> <div class="row"> <div class="col-lg-12"> <div class="section__title text-center"> <h2 class="title__be--2">New <span class="color--theme">Products</span></h2> <p>There are many variations of passages of Lorem Ipsum available, but the majority have suffered lebmid alteration in some ledmid form</p> </div> </div> </div> <!-- Start Single Tab Content --> <div class="furniture--4 border--round arrows_style owl-carousel owl-theme row mt--50"> @foreach($new_books as $book) <!-- Start Single Product -->}} <div class="product product__style--3"> <div class="col-lg-3 col-md-4 col-sm-6 col-12"> <div class="product__thumb"> <a class="first__img" href="single-product.html"><img src="{{$book->image->getImage()}}" alt="product image"></a> <div class="hot__box"> <span class="hot-label">BEST SALLER</span> </div> </div>
1 回答
人到中年有點(diǎn)甜
TA貢獻(xiàn)1895條經(jīng)驗(yàn) 獲得超7個(gè)贊
這很明顯。有一本沒有任何圖像的書。將img代碼更改為：
@isset ($book->image)
<img src="{{$book->image->getImage()}}" alt="product image">
@endisset
或使用optional method和Null Coalesce Operator來獲得默認(rèn)圖像：
<img src="{{optional($book->image)->getImage() ?? 'default_image_path.png'}}" alt="product image">
或者這個(gè)：
@if (isset($book->image))
<img src="{{$book->image->getImage()}}" alt="product image">
@else
<img src="default_image_path.png" alt="product image">
@endif
我希望這可以幫助你。
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