The content of this article is about the form of implementing nested comments in Laravel5 (detailed code explanation). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
We often see comments displayed in many forms, such as '@' so-and-so, or contracted comments like Zhihu, or nested comments, so at the beginning it is also The most common one is nested comments, because this is more eye-catching.
Preparation work
1. Design three tables: users, posts, comments, table The structure is as follows:
users
Schema::create('users', function (Blueprint $table) { $table->increments('id'); $table->string('name'); $table->string('email')->unique(); $table->string('password'); $table->rememberToken(); $table->timestamps(); });
posts
Schema::create('posts', function (Blueprint $table) { $table->increments('id'); $table->string('title'); $table->integer('user_id')->index(); $table->text('content'); $table->timestamps(); });
comments
Schema::create('comments', function (Blueprint $table) { $table->increments('id'); $table->integer('user_id')->index(); $table->integer('post_id')->index(); $table->integer('parent_id')->index()->default(0); $table->text('body'); $table->timestamps(); });
2.Model layer:
Post.php file
/** * 一篇文章有多个评论 * @return \Illuminate\Database\Eloquent\Relations\HasMany */ public function comments() { return $this->hasMany(Comment::class); } /** * 获取这篇文章的评论以parent_id来分组 * @return static */ public function getComments() { return $this->comments()->with('owner')->get()->groupBy('parent_id'); }
Comments.php file
/** * 这个评论的所属用户 * @return \Illuminate\Database\Eloquent\Relations\BelongsTo */ public function owner() { return $this->belongsTo(User::class, 'user_id'); } /** * 这个评论的子评论 * @return \Illuminate\Database\Eloquent\Relations\HasMany */ public function replies() { return $this->hasMany(Comment::class, 'parent_id'); }
Logic writing
The nested comments we want to implement actually already have some ideas in our preparation work. We first display an article. , and use the one-to-many relationship between articles and comments to display all comments. However, our comments involve a field called parent_id. This field is actually very special. We use this field to perform grouping. The code is the return above. $this->comments()->with('owner')->get()->groupBy('parent_id'), the specific process is as follows:
web.php file
\Auth::loginUsingId(1); //用户id为1的登录 //显示文章和相应的评论 Route::get('/post/show/{post}', function (\App\Post $post) { $post->load('comments.owner'); $comments = $post->getComments(); $comments['root'] = $comments['']; unset($comments['']); return view('posts.show', compact('post', 'comments')); }); //用户进行评论 Route::post('post/{post}/comments', function (\App\Post $post) { $post->comments()->create([ 'body' => request('body'), 'user_id' => \Auth::id(), 'parent_id' => request('parent_id', null), ]); return back(); });
View code
We need to implement nesting in terms of views, so as users comment more and more on each other, there will be more levels of nesting, so, We need to use various tricks to display the entire comment here. We use the @include() function to display it. Then the structure of our attempt is as follows:
- comments comments.blade.php form.blade.php list.blade.php - posts show.blade.php
The code is as follows:
show.blade.php
nbsp;html> <meta> <meta> <meta> <link> <div> <div> <h2 id="post-gt-title">{{$post->title}}</h2> <h4 id="post-gt-content">{{$post->content}}</h4> <hr> @include('comments.list',['collections'=>$comments['root']]) <h3 id="留下您的评论">留下您的评论</h3> @include('comments.form',['parentId'=>$post->id]) </div> </div>
comment.blade.php
<div> <h5> <span>{{$comment->owner->name}}</span>:</h5> <h5 id="comment-gt-body">{{$comment->body}}</h5> @include('comments.form',['parentId'=>$comment->id]) @if(isset($comments[$comment->id])) @include('comments.list',['collections'=>$comments[$comment->id]]) @endif <hr> </div>
form.blade.php
list.blade.php
@foreach($collections as $comment) @include('comments.comment',['comment'=>$comment]) @endforeach
The final rendering is as follows

The above is the detailed content of Laravel5 implements the form of nested comments (detailed code explanation). For more information, please follow other related articles on the PHP Chinese website!

本篇文章给大家带来了关于laravel的相关知识,其中主要介绍了关于单点登录的相关问题,单点登录是指在多个应用系统中,用户只需要登录一次就可以访问所有相互信任的应用系统,下面一起来看一下,希望对大家有帮助。

本篇文章给大家带来了关于laravel的相关知识,其中主要介绍了关于Laravel的生命周期相关问题,Laravel 的生命周期从public\index.php开始,从public\index.php结束,希望对大家有帮助。

在laravel中,guard是一个用于用户认证的插件;guard的作用就是处理认证判断每一个请求,从数据库中读取数据和用户输入的对比,调用是否登录过或者允许通过的,并且Guard能非常灵活的构建一套自己的认证体系。

laravel中asset()方法的用法:1、用于引入静态文件,语法为“src="{{asset(‘需要引入的文件路径’)}}"”;2、用于给当前请求的scheme前端资源生成一个url,语法为“$url = asset('前端资源')”。

本篇文章给大家带来了关于laravel的相关知识,其中主要介绍了关于使用中间件记录用户请求日志的相关问题,包括了创建中间件、注册中间件、记录用户访问等等内容,下面一起来看一下,希望对大家有帮助。

本篇文章给大家带来了关于laravel的相关知识,其中主要介绍了关于中间件的相关问题,包括了什么是中间件、自定义中间件等等,中间件为过滤进入应用的 HTTP 请求提供了一套便利的机制,下面一起来看一下,希望对大家有帮助。

在laravel中,fill方法是一个给Eloquent实例赋值属性的方法,该方法可以理解为用于过滤前端传输过来的与模型中对应的多余字段;当调用该方法时,会先去检测当前Model的状态,根据fillable数组的设置,Model会处于不同的状态。

laravel路由文件在“routes”目录里。Laravel中所有的路由文件定义在routes目录下,它里面的内容会自动被框架加载;该目录下默认有四个路由文件用于给不同的入口使用:web.php、api.php、console.php等。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Atom editor mac version download
The most popular open source editor

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
