How to fix a strange behaviour with laravel livewire and pagination? - laravel

Question

I started with Laravel 8 and livewire a few days ago. I still have a lot to discover but I am on my way.
Lastly, I encountered a behaviour I have trouble understanding.
My goal
I want to create a page to CRUD posts. What I want is to have a post list that is paginated displayed at the bottom of the page, a button to create a new post and the possibility to click a button on each post line to edit the post.
I also want the editor of the post displayed at the top of the page while the list is hidden (but this last possibility is not absolutely necessary).
I could manage to have this working as long as the post list is not paginated but not with pagination.
To do this I use a liveewire component whose code is herebelow:
Component's code in app/Http/livewire/posts/Posts.php
<?php
namespace App\Http\Livewire\Posts;
use App\Models\Post;
use Livewire\Component;
class Posts extends Component
{
public $posts;
public $links;
public $post_id,$title, $abstract, $body,$category,$diaporama_dir,
$beg_date,$end_date,$close_date,$receive_registration,
$sticky,$user_id,$inscription_directive;
/**
* The attributes that are mass assignable.
*
* #var array
*/
public function render()
{
$this->mode='list';
$this->posts=Post::select('id','title')->orderBy('created_at','DESC')->paginate(15)->toArray();
$this->links=$this->posts['links'];
//dd($this->links);
$this->user_id=auth()->user()->id;
return view('livewire.posts.posts');
}
public function donothing(){
}
/*
* The attributes that are mass assignable.
*
* #var array
*/
public function resetInputFields(){
$this->title = '';
$this->body = '';
$this->title='';
$this->abstract='';
$this->body='';
$this->category='';
$this->diaporama_dir='';
$this->beg_date='';
$this->end_date='';
$this->close_date='';
$this->receive_registration='';
$this->sticky='';
$this->inscription_directive='';
}
/**
* The attributes that are mass assignable.
*
* #var array
*/
public function store()
{
$validatedData = $this->validate([
'title' => 'required',
'body' => 'required',
'abstract'=>'required',
'category'=>'',
'diaporama_dir'=>'',
'beg_date'=>'sometimes',
'end_date'=>'sometimes',
'close_date'=>'sometimes',
'receive_registration'=>'',
'sticky'=>'',
'user_id'=>'required',
'inscription_directive'=>''
]);
Post::create($validatedData);
session()->flash('message', 'Bravo ! Votre article a été enregistré.');
// $this->resetInputFields(); //user may want to keep the input stable
}
/**
* The attributes that are mass assignable.
*
* #var array
*/
public function edit($id)
{
$post = Post::findOrFail($id);
$this->post_id = $id;
$this->title = $post->title;
$this->abstract=$post->abstract;
$this->body=$post->body;
$this->category=$post->category;
$this->diaporama_dir=$post->diaporama_dir;
$this->beg_date=$post->beg_date;
$this->end_date=$post->end_date;
$this->close_date=$post->close_date;
$this->receive_registration=$post->receive_registration;
$this->sticky=$post->sticky;
$this->inscription_directive=$post->inscription_directive;
$this->dispatchBrowserEvent('notify','je passe en mode edit');//to switch browser page to edit mode
}
/**
* The attributes that are mass assignable.
*
* #var array
*/
public function update()
{
$validatedData = $this->validate([
'title' => 'required',
'body' => 'required',
'abstract'=>'required',
'category'=>'',
'diaporama_dir'=>'',
'beg_date'=>'sometimes',
'end_date'=>'sometimes',
'close_date'=>'sometimes',
'receive_registration'=>'',
'sticky'=>'',
'user_id'=>'required',
'inscription_directive'=>''
]);
$post = Post::find($this->post_id);
$post->update([
'title' => $this->title,
'body'=> $this->body,
'abstract'=> $this->abstract,
'category'=> $this->category,
'diaporama_dir'=>$this->diaporama_dir,
'beg_date'=>$this->beg_date,
'end_date'=>$this->end_date,
'close_date'=>$this->close_date,
'receive_registration'=>$this->receive_registration,
'sticky'=>$this->sticky,
'user_id'=>$this->user_id,
'inscription_directive'=>$this->inscription_directive
]);
session()->flash('message', "Bravo ! L'article a été mis à jour.");
// $this->resetInputFields();//user may like to keep the input fields stable
}
}
and views are these:
View 1 : the main page in resources/views/livewire/posts/posts.blade.php
<div class="container m-auto w-10/12">
<div x-data="{ mode: 'list' }">
#if (session()->has('message'))
<div class="bg-green-200 p-4 w-full my-8 text-xl text-orange-500">
{{ session('message') }}
</div>
#endif
<div x-on:notify.window="mode = 'update'">
<div x-show="mode==='update'">
#include('livewire.posts.update')
</div>
<div x-show="mode === 'edit'">
#include('livewire.posts.create')
</div>
</div>
{{-- <div x-show="mode === 'list'" class="">--}}
<div>
<div>
<button x-on:click="mode = 'edit'" class="bg-red-400 px-2 py-1 border rounded-lg mt-2">Nouvel
article</button>
</div>
<table class=" bg-green-400 w-full table table-bordered mt-5 ">
<thead>
<tr class="bg-red-50 mb-2">
<th>Id.</th>
<th>Titre</th>
<th width="150px">Action</th>
</tr>
</thead>
<tbody>
#for ($i = 0; $i < $posts['per_page']; $i++)
<tr class="bg-red-400 mb-2 p-2 space-y-2 border-8 border-red-50 ">
<td>{{ $posts['data'][$i]['id'] }}</td>
<td>{{ $posts['data'][$i]['title'] }}</td>
<td>{{--les actions--}}
<button wire:click="edit({{ $posts['data'][$i]['id'] }})"
class="btn btn-primary btn-sm">Edit</button>
{{-- <button wire:click="delete({{ $post->id }})"
class="btn btn-danger btn-sm">Delete</button>--}}
</td>
</tr>
#endfor
</tbody>
</table>
<div class="flex flex-row mt-2">
#for ($i = 0; $i < count($links); $i++)
<div class="flex p-2 mr-2 border w-max-content">
{{$links[$i]['label']}}
</div>
#endfor
</div>
</div>
</div>
2- create include in resources/views/livewire/posts/create.blade.php
<div class="container bg-green-500 p-4">
<form>
This is the create form
<input type="hidden" name="user_id" wire:model="user_id" >
<div class="flex flex-col md:flex-row" >
<div class=" mt-2 flex flex-col w-max-content">
<label for="category">Catégorie:</label>
<select class="" name="category" id="category" wire:model="category">
<option value="Sans">Sans</option>
<option value="Annoncement">Annonce d'un événement</option>
</select>
#error('category') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<div class=" mt-2 flex flex-col flex-auto ml-4">
<label for="title">Title:</label>
<input type="text" class="form-control" name="title" id="title" placeholder="Saisissez un titre"
wire:model="title" value="">
#error('title') <span class="text-danger">{{ $message }}</span>#enderror
</div>
</div>
<div class="flex flex-col md:flex-row" >
<div class=" mt-2 flex flex-col w-max-cbeg_date ">
<label for="beg_date">Date de début</label>
<input type="text" class="" name="beg_date" id="beg_date" wire:model="beg_date">
#error('beg_date') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<div class=" mt-2 flex flex-col w-max-cbeg_date ml-4">
<label for="end_date">Datend_date</label>
<input type="text" class="" name="end_date" id="end_date" wire:model="end_date">
#error('end_date') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<div class=" mt-2 flex flex-col w-max-cbeg_date ml-4">
<label for="close_dclose">Date limite</label>
<input type="text" class="" name="close_date" id="close_date" wire:model="close_date">
#error('close_date') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<div class=" mt-2 flex flex-col w-max-content ml-4">
<label for="receive_registration">Accepte les inscriptions:</label>
<select class="" name="receive_registration" id="receive_registration" wire:model="receive_registration">
<option value="no">Non</option>
<option value="yes">Oui</option>
</select>
#error('receive_registration') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<div class=" mt-2 flex flex-col flex-auto ml-4">
<label for="title">Dossier du diaporama</label>
<input type="text" class="form-control" name="diaporama_dir" id="diaporama_dir" placeholder="ex: admin/1"
wire:model="diaporama_dir">
#error('diaporama_dir') <span class="text-danger">{{ $message }}</span>#enderror
</div>
</div>
<div class="mt-2 flex flex-col">
<label for="abstract">Résumé</label>
<textarea class="form-control" name="abstract" id="abstract" wire:model="abstract"
placeholder="Saisissez votre article"></textarea>
#error('abstract') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<div class="mt-2 flex flex-col">
<label for="body">Corps de l'article</label>
<textarea class="form-control" name="body" id="body" wire:model="body" rows=30
placeholder="Saisissez votre article"></textarea>
#error('body') <span class="text-danger">{{ $message }}</span>#enderror
</div>
<button wire:click.prevent="store()" class="bg-red-400 px-2 py-1 border rounded-lg mt-2">Enregistrer</button>
<button wire:click.prevent="resetInputFields()" class="bg-red-400 px-2 py-1 border rounded-lg mt-2">Effacer tout</button>
<button #click.prevent="mode = 'list'" class="bg-red-400 px-2 py-1 border rounded-lg mt-2 ml-16">Retour à la liste</button>
</form>
update include
The update include is exactly the same as the create include except an additional hidden field for the post id.
What is happening?
At startup, I mean when I visit the localhost:8000/posts page, the page 1 is correctly displayed and the links at the bottom of the page are like localhost:8000/posts?page=3 whichever the number of the page may be.
From this page I can normally go to another page using the bottom links, and this several times.
The troube arises when I click a link to edit a post. The post is correctly sent back by the server but instantly we are switched to page 1 of the paginated posts and the bottom links take a strange form such as localhost:8000/livewire/message/posts.posts?page=3 wichever the page number may be.
The trouble arises also when, after having displayed the create form, I type a first char in the fields. In fact it seems that it arises each time a sync is required.
How can I fix this?

Answer 1

replace
<div class="flex flex-row mt-2">
#for ($i = 0; $i < count($links); $i++)
<div class="flex p-2 mr-2 border w-max-content">
{{$links[$i]['label']}}
</div>
#endfor
</div>
with
<div class="flex flex-row mt-2">
{{ $posts->links() }}
</div>
and in component
use WithPagination;
ref link https://laravel-livewire.com/docs/2.x/pagination