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# Laravel Like
👍 User-like features for Laravel Application.
[](https://github.com/overtrue/laravel-like/actions/workflows/ci.yml)
[](https://github.com/sponsors/overtrue)
## Installing
```shell
composer require overtrue/laravel-like -vvv
```
### Configuration and Migrations
```shell
php artisan vendor:publish --provider="Overtrue\LaravelLike\LikeServiceProvider"
```
## Usage
### Traits
#### `Overtrue\LaravelLike\Traits\Liker`
```php
use Illuminate\Notifications\Notifiable;
use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Overtrue\LaravelLike\Traits\Liker;
class User extends Authenticatable
{
use Liker;
<...>
}
```
#### `Overtrue\LaravelLike\Traits\Likeable`
```php
use Illuminate\Database\Eloquent\Model;
use Overtrue\LaravelLike\Traits\Likeable;
class Post extends Model
{
use Likeable;
<...>
}
```
### API
```php
$user = User::find(1);
$post = Post::find(2);
$user->like($post);
$user->unlike($post);
$user->toggleLike($post);
$user->hasLiked($post);
$post->isLikedBy($user);
```
Get user likes with pagination:
```php
$likes = $user->likes()->with('likeable')->paginate(20);
foreach ($likes as $like) {
$like->likeable; // App\Post instance
}
```
Get object likers:
```php
foreach($post->likers as $user) {
// echo $user->name;
}
```
with pagination:
```php
$likers = $post->likers()->paginate(20);
foreach($likers as $user) {
// echo $user->name;
}
```
### Aggregations
```php
// all
$user->likes()->count();
// short way
$user->totalLikes;
// with type
$user->likes()->withType(Post::class)->count();
// likers count
$post->likers()->count();
// short way
$post->totalLikers
```
List with `*_count` attribute:
```php
// likes_count
$users = User::withCount('likes')->get();
foreach($users as $user) {
// $user->likes_count;
}
// likers_count
$posts = User::withCount('likers')->get();
foreach($posts as $post) {
// $post->likes_count;
}
```
### N+1 issue
To avoid the N+1 issue, you can use eager loading to reduce this operation to just 2 queries. When querying, you may specify which relationships should be eager loaded using the `with` method:
```php
// Liker
$users = App\User::with('likes')->get();
foreach($users as $user) {
$user->hasLiked($post);
}
// Likeable
$posts = App\Post::with('likes')->get();
// or
$posts = App\Post::with('likers')->get();
foreach($posts as $post) {
$post->isLikedBy($user);
}
```
Of course we have a better solution, which can be found in the following section：
### Attach user like status to likeable collection
You can use `Liker::attachLikeStatus($likeables)` to attach the user like status, it will attach `has_liked` attribute to each model of `$likeables`:
#### For model
```php
$post = Post::find(1);
$post = $user->attachLikeStatus($post);
// result
[
"id" => 1
"title" => "Add socialite login support."
"created_at" => "2021-05-20T03:26:16.000000Z"
"updated_at" => "2021-05-20T03:26:16.000000Z"
"has_liked" => true
],
```
#### For `Collection | Paginator | LengthAwarePaginator | array`:
```php
$posts = Post::oldest('id')->get();
$posts = $user->attachLikeStatus($posts);
$posts = $posts->toArray();
// result
[
[
"id" => 1
"title" => "Post title1"
"created_at" => "2021-05-20T03:26:16.000000Z"
"updated_at" => "2021-05-20T03:26:16.000000Z"
"has_liked" => true
],
[
"id" => 2
"title" => "Post title2"
"created_at" => "2021-05-20T03:26:16.000000Z"
"updated_at" => "2021-05-20T03:26:16.000000Z"
"has_liked" => fasle
],
[
"id" => 3
"title" => "Post title3"
"created_at" => "2021-05-20T03:26:16.000000Z"
"updated_at" => "2021-05-20T03:26:16.000000Z"
"has_liked" => true
],
]
```
#### For pagination
```php
$posts = Post::paginate(20);
$user->attachLikeStatus($posts);
```
### Events
| **Event** | **Description** |
| ------------------------------------- | ------------------------------------------- |
| `Overtrue\LaravelLike\Events\Liked` | Triggered when the relationship is created. |
| `Overtrue\LaravelLike\Events\Unliked` | Triggered when the relationship is deleted. |
## Related packages
- Follow: [overtrue/laravel-follow](https://github.com/overtrue/laravel-follow)
- Like: [overtrue/laravel-like](https://github.com/overtrue/laravel-like)
- Favorite: [overtrue/laravel-favorite](https://github.com/overtrue/laravel-favorite)
- Subscribe: [overtrue/laravel-subscribe](https://github.com/overtrue/laravel-subscribe)
- Vote: [overtrue/laravel-vote](https://github.com/overtrue/laravel-vote)
- Bookmark: overtrue/laravel-bookmark (working in progress)
## :heart: Sponsor me
[](https://github.com/sponsors/overtrue)
如果你喜欢我的项目并想支持它，[点击这里 :heart:](https://github.com/sponsors/overtrue)
## Project supported by JetBrains
Many thanks to Jetbrains for kindly providing a license for me to work on this and other open-source projects.
[](https://www.jetbrains.com/?from=https://github.com/overtrue)
## Contributing
You can contribute in one of three ways:
1. File bug reports using the [issue tracker](https://github.com/overtrue/laravel-likes/issues).
2. Answer questions or fix bugs on the [issue tracker](https://github.com/overtrue/laravel-likes/issues).
3. Contribute new features or update the wiki.
_The code contribution process is not very formal. You just need to make sure that you follow the PSR-0, PSR-1, and PSR-2 coding guidelines. Any new code contributions must be accompanied by unit tests where applicable._
## PHP 扩展包开发
> 想知道如何从零开始构建 PHP 扩展包？
>
> 请关注我的实战课程，我会在此课程中分享一些扩展开发经验 —— [《PHP 扩展包实战教程 - 从入门到发布》](https://learnku.com/courses/creating-package)
## License
MIT