05. Editing Chirps

Let's add a feature that's missing from other popular bird-themed microblogging platforms — the ability to edit Chirps!

Updating our component

Let's start by updating our existing chirp.list Livewire component to have an edit form for existing Chirps. The edit form will be a nested Livewire component that we'll create later.

First, we'll use the x-dropdown component that is included with Breeze. In addition, we will make this dropdown only visible to the Chirp's original author. In this dropdown, we'll add a link that will trigger the edit action on the component. This method will set the editing property to the Chirp that we want to edit. We'll use this property to conditionally display the edit form.

We'll also display an indication if a Chirp has been edited by comparing the Chirp's created_at date with its updated_at date:

resources/views/livewire/chirps/list.blade.php

 <?php
  
 use App\Models\Chirp;
 use Illuminate\Database\Eloquent\Collection;
 use Livewire\Attributes\On;
 use Livewire\Volt\Component;
  
 new class extends Component
 {
     public Collection $chirps;
+ 
+    public ?Chirp $editing = null; 
  
     public function mount(): void
     {
         $this->getChirps();
     }
  
     #[On('chirp-created')]
     public function getChirps(): void
     {
         $this->chirps = Chirp::with('user')
             ->latest()
             ->get();
     }
+ 
+    public function edit(Chirp $chirp): void
+    {
+        $this->editing = $chirp;
+ 
+        $this->getChirps();
+    } 
 }; ?>
  
 <div class="mt-6 bg-white shadow-sm rounded-lg divide-y">
     @foreach ($chirps as $chirp)
         <div class="p-6 flex space-x-2" wire:key="{{ $chirp->id }}">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6 text-gray-600 -scale-x-100" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z" />
             </svg>
             <div class="flex-1">
                 <div class="flex justify-between items-center">
                     <div>
                         <span class="text-gray-800">{{ $chirp->user->name }}</span>
                         <small class="ml-2 text-sm text-gray-600">{{ $chirp->created_at->format('j M Y, g:i a') }}</small>
+                        @unless ($chirp->created_at->eq($chirp->updated_at))
+                            <small class="text-sm text-gray-600"> &middot; {{ __('edited') }}</small>
+                        @endunless
                     </div>
+                    @if ($chirp->user->is(auth()->user()))
+                        <x-dropdown>
+                            <x-slot name="trigger">
+                                <button>
+                                    <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 text-gray-400" viewBox="0 0 20 20" fill="currentColor">
+                                        <path d="M6 10a2 2 0 11-4 0 2 2 0 014 0zM12 10a2 2 0 11-4 0 2 2 0 014 0zM16 12a2 2 0 100-4 2 2 0 000 4z" />
+                                    </svg>
+                                </button>
+                            </x-slot>
+                            <x-slot name="content">
+                                <x-dropdown-link wire:click="edit({{ $chirp->id }})">
+                                    {{ __('Edit') }}
+                                </x-dropdown-link>
+                            </x-slot>
+                        </x-dropdown>
+                    @endif
                 </div>
-                <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
+                @if ($chirp->is($editing)) 
+                    <livewire:chirps.edit :chirp="$chirp" :key="$chirp->id" />
+                @else
+                    <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
+                @endif 
             </div>
         </div>
     @endforeach
 </div>

resources/views/livewire/chirps/list.blade.php

 <?php
  
 use App\Models\Chirp;
 use function Livewire\Volt\{on, state};
  
 $getChirps = fn () => $this->chirps = Chirp::with('user')->latest()->get();
  
-state(['chirps' => $getChirps]); 
+state(['chirps' => $getChirps, 'editing' => null]); 
  
 on(['chirp-created' => $getChirps]);
+ 
+$edit = function (Chirp $chirp) {
+    $this->editing = $chirp;
+ 
+    $this->getChirps();
+};  
  
 ?>
  
 <div class="mt-6 bg-white shadow-sm rounded-lg divide-y">
     @foreach ($chirps as $chirp)
         <div class="p-6 flex space-x-2" wire:key="{{ $chirp->id }}">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6 text-gray-600 -scale-x-100" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z" />
             </svg>
             <div class="flex-1">
                 <div class="flex justify-between items-center">
                     <div>
                         <span class="text-gray-800">{{ $chirp->user->name }}</span>
                         <small class="ml-2 text-sm text-gray-600">{{ $chirp->created_at->format('j M Y, g:i a') }}</small>
+                        @unless ($chirp->created_at->eq($chirp->updated_at))
+                            <small class="text-sm text-gray-600"> &middot; {{ __('edited') }}</small>
+                        @endunless
                     </div>
+                    @if ($chirp->user->is(auth()->user()))
+                        <x-dropdown>
+                            <x-slot name="trigger">
+                                <button>
+                                    <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 text-gray-400" viewBox="0 0 20 20" fill="currentColor">
+                                        <path d="M6 10a2 2 0 11-4 0 2 2 0 014 0zM12 10a2 2 0 11-4 0 2 2 0 014 0zM16 12a2 2 0 100-4 2 2 0 000 4z" />
+                                    </svg>
+                                </button>
+                            </x-slot>
+                            <x-slot name="content">
+                                <x-dropdown-link wire:click="edit({{ $chirp->id }})">
+                                    {{ __('Edit') }}
+                                </x-dropdown-link>
+                            </x-slot>
+                        </x-dropdown>
+                    @endif
                 </div>
-                <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
+                @if ($chirp->is($editing)) 
+                    <livewire:chirps.edit :chirp="$chirp" :key="$chirp->id" />
+                @else
+                    <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
+                @endif 
             </div>
         </div>
     @endforeach
 </div>

Creating the edit form

Next, let's create the chirps.edit Livewire component:

php artisan make:volt chirps/edit --class

php artisan make:volt chirps/edit

This will create a new Livewire component at resources/views/livewire/chirps/edit.blade.php. Let's update the Livewire component content to display a form for editing a Chirp.

Note that, even though we're only displaying the edit button to the author of the Chirp, we also need to authorize the request on the server to make sure it's actually the Chirp's author requesting that the Chirp be updated:

resources/views/livewire/chirps/edit.blade.php

 <?php
  
+use App\Models\Chirp; 
+use Livewire\Attributes\Validate; 
 use Livewire\Volt\Component;
  
 new class extends Component
 {
+    public Chirp $chirp; 
+ 
+    #[Validate('required|string|max:255')]
+    public string $message = '';
+ 
+    public function mount(): void
+    {
+        $this->message = $this->chirp->message;
+    }
+ 
+    public function update(): void
+    {
+        $this->authorize('update', $this->chirp);
+ 
+        $validated = $this->validate();
+ 
+        $this->chirp->update($validated);
+ 
+        $this->dispatch('chirp-updated');
+    }
+ 
+    public function cancel(): void
+    {
+        $this->dispatch('chirp-edit-canceled');
+    }  
 }; ?>
  
 <div>
-    // 
+    <form wire:submit="update"> 
+        <textarea
+            wire:model="message"
+            class="block w-full border-gray-300 focus:border-indigo-300 focus:ring focus:ring-indigo-200 focus:ring-opacity-50 rounded-md shadow-sm"
+        ></textarea>
+ 
+        <x-input-error :messages="$errors->get('message')" class="mt-2" />
+        <x-primary-button class="mt-4">{{ __('Save') }}</x-primary-button>
+        <button class="mt-4" wire:click.prevent="cancel">Cancel</button>
+    </form> 
 </div>

resources/views/livewire/chirps/edit.blade.php

 <?php
  
-use function Livewire\Volt\{state}; 
+use function Livewire\Volt\{mount, rules, state}; 
+ 
+state(['chirp', 'message']);
+ 
+rules(['message' => 'required|string|max:255']);
+ 
+mount(fn () => $this->message = $this->chirp->message);
+ 
+$update = function () {
+    $this->authorize('update', $this->chirp);
+ 
+    $validated = $this->validate();
+ 
+    $this->chirp->update($validated);
+ 
+    $this->dispatch('chirp-updated');
+};
+ 
+$cancel = fn () => $this->dispatch('chirp-edit-canceled'); 
  
 ?>
  
 <div>
-    // 
+    <form wire:submit="update"> 
+        <textarea
+            wire:model="message"
+            class="block w-full border-gray-300 focus:border-indigo-300 focus:ring focus:ring-indigo-200 focus:ring-opacity-50 rounded-md shadow-sm"
+        ></textarea>
+ 
+        <x-input-error :messages="$errors->get('message')" class="mt-2" />
+        <x-primary-button class="mt-4">{{ __('Save') }}</x-primary-button>
+        <button class="mt-4" wire:click.prevent="cancel">Cancel</button>
+    </form> 
 </div>

Finally, we'll need to update the chirp.list component to listen both for the chirp-updated and chirp-edit-canceled events.

If the chirp-updated event is dispatched, we'll need to update the list of Chirps. If the chirp-edit-canceled event is dispatched, we'll need to set the editing property to null so that the edit form is no longer displayed:

resources/views/livewire/chirps/list.blade.php

 <?php
  ...
  
 use App\Models\Chirp;
 use Illuminate\Database\Eloquent\Collection;
 use Livewire\Attributes\On;
 use Livewire\Volt\Component;
  
 new class extends Component
 {
  ...
     public Collection $chirps;
  
     public ?Chirp $editing = null;
  
     public function mount(): void
     {
         $this->getChirps();
     }
  
     #[On('chirp-created')]
     public function getChirps(): void
     {
         $this->chirps = Chirp::with('user')
             ->latest()
             ->get();
     }
  
     public function edit(Chirp $chirp): void
     {
         $this->editing = $chirp;
  
         $this->getChirps();
     }
+ 
+    #[On('chirp-edit-canceled')]
+    #[On('chirp-updated')] 
+    public function disableEditing(): void
+    {
+        $this->editing = null;
+ 
+        $this->getChirps();
+    } 
 }; ?>
  
 <div class="mt-6 bg-white shadow-sm rounded-lg divide-y">
     ...
     @foreach ($chirps as $chirp)
         <div class="p-6 flex space-x-2" wire:key="{{ $chirp->id }}">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6 text-gray-600 -scale-x-100" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z" />
             </svg>
             <div class="flex-1">
                 <div class="flex justify-between items-center">
                     <div>
                         <span class="text-gray-800">{{ $chirp->user->name }}</span>
                         <small class="ml-2 text-sm text-gray-600">{{ $chirp->created_at->format('j M Y, g:i a') }}</small>
                         @unless ($chirp->created_at->eq($chirp->updated_at))
                             <small class="text-sm text-gray-600"> &middot; {{ __('edited') }}</small>
                         @endunless
                     </div>
                     @if ($chirp->user->is(auth()->user()))
                         <x-dropdown>
                             <x-slot name="trigger">
                                 <button>
                                     <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 text-gray-400" viewBox="0 0 20 20" fill="currentColor">
                                         <path d="M6 10a2 2 0 11-4 0 2 2 0 014 0zM12 10a2 2 0 11-4 0 2 2 0 014 0zM16 12a2 2 0 100-4 2 2 0 000 4z" />
                                     </svg>
                                 </button>
                             </x-slot>
                             <x-slot name="content">
                                 <x-dropdown-link wire:click="edit({{ $chirp->id }})">
                                     {{ __('Edit') }}
                                 </x-dropdown-link>
                             </x-slot>
                         </x-dropdown>
                     @endif
                 </div>
                 <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
                 @if ($chirp->is($editing))
                     <livewire:chirps.edit :chirp="$chirp" :key="$chirp->id" />
                 @else
                     <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
                 @endif
             </div>
         </div>
     @endforeach 
 </div>

resources/views/livewire/chirps/list.blade.php

 <?php
  
 use App\Models\Chirp;
 use function Livewire\Volt\{on, state};
  
 $getChirps = fn () => $this->chirps = Chirp::with('user')->latest()->get();
  
+$disableEditing = function () { 
+    $this->editing = null;
+ 
+    return $this->getChirps();
+}; 
  
 state(['chirps' => $getChirps, 'editing' => null]);
  
-on(['chirp-created' => $getChirps]); 
+on([ 
+    'chirp-created' => $getChirps,
+    'chirp-updated' => $disableEditing,
+    'chirp-edit-canceled' => $disableEditing,
+]); 
  
 $edit = function (Chirp $chirp) {
     $this->editing = $chirp;
  
     $this->getChirps();
 };
  
 ?>
  
 <div class="mt-6 bg-white shadow-sm rounded-lg divide-y">
     ...
     @foreach ($chirps as $chirp)
         <div class="p-6 flex space-x-2" wire:key="{{ $chirp->id }}">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6 text-gray-600 -scale-x-100" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z" />
             </svg>
             <div class="flex-1">
                 <div class="flex justify-between items-center">
                     <div>
                         <span class="text-gray-800">{{ $chirp->user->name }}</span>
                         <small class="ml-2 text-sm text-gray-600">{{ $chirp->created_at->format('j M Y, g:i a') }}</small>
                         @unless ($chirp->created_at->eq($chirp->updated_at))
                             <small class="text-sm text-gray-600"> &middot; {{ __('edited') }}</small>
                         @endunless
                     </div>
                     @if ($chirp->user->is(auth()->user()))
                         <x-dropdown>
                             <x-slot name="trigger">
                                 <button>
                                     <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 text-gray-400" viewBox="0 0 20 20" fill="currentColor">
                                         <path d="M6 10a2 2 0 11-4 0 2 2 0 014 0zM12 10a2 2 0 11-4 0 2 2 0 014 0zM16 12a2 2 0 100-4 2 2 0 000 4z" />
                                     </svg>
                                 </button>
                             </x-slot>
                             <x-slot name="content">
                                 <x-dropdown-link wire:click="edit({{ $chirp->id }})">
                                     {{ __('Edit') }}
                                 </x-dropdown-link>
                             </x-slot>
                         </x-dropdown>
                     @endif
                 </div>
                 <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
                 @if ($chirp->is($editing))
                     <livewire:chirps.edit :chirp="$chirp" :key="$chirp->id" />
                 @else
                     <p class="mt-4 text-lg text-gray-900">{{ $chirp->message }}</p>
                 @endif
             </div>
         </div>
     @endforeach 
 </div>

Authorization

By default, the authorize method will prevent everyone from being able to update the Chirp. We can specify who is allowed to update it by creating a Model Policy with the following command:

php artisan make:policy ChirpPolicy --model=Chirp

This will create a policy class at app/Policies/ChirpPolicy.php which we can update to specify that only the author is authorized to update a Chirp:

app/Policies/ChirpPolicy.php

 <?php
  ...
 namespace App\Policies;
  
 use App\Models\Chirp;
 use App\Models\User;
 use Illuminate\Auth\Access\HandlesAuthorization;
  
 class ChirpPolicy
 {
  ...
     use HandlesAuthorization;
  
     /**
      * Determine whether the user can view any models.
      */
     public function viewAny(User $user): bool
     {
         //
     }
  
     /**
      * Determine whether the user can view the model.
      */
     public function view(User $user, Chirp $chirp): bool
     {
         //
     }
  
     /**
      * Determine whether the user can create models.
      */
     public function create(User $user): bool
     {
         //
     }
  
     /**
      * Determine whether the user can update the model.
      */
     public function update(User $user, Chirp $chirp): bool
     {
-        //
+        return $chirp->user()->is($user);
     }
  ...
     /**
      * Determine whether the user can delete the model.
      */
     public function delete(User $user, Chirp $chirp): bool
     {
         //
     }
  
     /**
      * Determine whether the user can restore the model.
      */
     public function restore(User $user, Chirp $chirp): bool
     {
         //
     }
  
     /**
      * Determine whether the user can permanently delete the model.
      */
     public function forceDelete(User $user, Chirp $chirp): bool
     {
         //
     }
  
 }

Testing it out

Time to test it out! Go ahead and edit a few Chirps using the dropdown menu. If you register another user account, you'll see that only the author of a Chirp can edit it.

Continue to allow deleting of Chirps...

05. Editing Chirps

#Updating our component

#Creating the edit form

#Authorization

#Testing it out

Updating our component

Creating the edit form

Authorization

Testing it out