This package introduces new eloquent events for sync(), attach(), detach() or updateExistingPivot() methods on BelongsToMany relation.
In Laravel events are not dispatched when BelongsToMany relation (pivot table) is updated with sync(), attach(), detach() or updateExistingPivot() methods, but this package will help with that.
| Laravel Version | Package Tag | Supported | Development Branch |
|---|---|---|---|
| 5.5.* | 2.1.* | yes | master |
| 5.4.* | 2.0.* | yes | 2.0 |
| 5.3.* | 1.3.* | yes | 1.3 |
| 5.2.* | 1.2.* | yes | 1.2 |
| <5.2 | - | no |
1.Install package with composer
composer require fico7489/laravel-pivot:"*"
With this statement, a composer will install highest available package version for your current laravel version.
2.Use Fico7489\Laravel\Pivot\Traits\PivotEventTrait trait in your base model or only in particular models.
...
use Fico7489\Laravel\Pivot\Traits\PivotEventTrait;
use Illuminate\Database\Eloquent\Model;
abstract class BaseModel extends Model
{
use PivotEventTrait;
...
and that's it, enjoy.
You can check all eloquent events here: https://laravel.com/docs/5.5/eloquent#events)
New events are :
pivotAttaching, pivotAttached
pivotDetaching, pivotDetached,
pivotUpdating, pivotUpdated
The best way to catch events is with this model functions :
public static function boot()
{
parent::boot();
static::pivotAttaching(function ($model, $relationName, $pivotIds, $pivotIdsAttributes) {
//
});
static::pivotAttached(function ($model, $relationName, $pivotIds, $pivotIdsAttributes) {
//
});
static::pivotDetaching(function ($model, $relationName, $pivotIds) {
//
});
static::pivotDetached(function ($model, $relationName, $pivotIds) {
//
});
static::pivotUpdating(function ($model, $relationName, $pivotIds, $pivotIdsAttributes) {
//
});
static::pivotUpdated(function ($model, $relationName, $pivotIds, $pivotIdsAttributes) {
//
});
static::updating(function ($model) {
//this is how we catch standard eloquent events
});
}
You can also see those events here :
\Event::listen('eloquent.*', function ($eventName, array $data) {
echo $eventName; //e.g. 'eloquent.pivotAttached'
});
Four BelongsToMany methods dispatches events from this package :
attach()
Dispatches one pivotAttaching and one pivotAttached event.
Even when more rows are added only one event is dispatched for all rows but in that case, you can see all changed row ids in the $pivotIds variable, and the changed row ids with attributes in the $pivotIdsAttributes variable.
detach()
Dispatches one pivotDetaching and one pivotDetached event.
Even when more rows are deleted only one event is dispatched for all rows but in that case, you can see all changed row ids in the $pivotIds variable.
updateExistingPivot()
Dispatches one pivotUpdating and one pivotUpdated event.
You can change only one row in the pivot table with updateExistingPivot.
sync()
Dispatches more pivotAttaching and more pivotAttached events, depending on how many rows are added in the pivot table. These events are not dispatched if nothing is attached.
Dispatches one pivotDetaching and one pivotDetached event, but you can see all deleted ids in the $pivotIds variable. This event is not dispatched if nothing is detached.
E.g. when you call sync() if two rows are added and two are deleted two pivotAttaching and two pivotAttached events and one pivotDetaching and one pivotDetached event will be dispatched.
If sync() is called but rows are not added or deleted events are not dispatched.
We have three tables in database users(id, name), roles(id, name), role_user(user_id, role_id). We have two models :
...
class User extends Model
{
use PivotEventTrait;
....
public function roles()
{
return $this->belongsToMany(Role::class);
}
static::pivotAttached(function ($model, $relationName, $pivotIds, $pivotIdsAttributes) {
echo 'pivotAttached';
echo get_class($model);
echo $relationName;
print_r($pivotIds);
print_r($pivotIdsAttributes);
});
static::pivotUpdated(function ($model, $relationName, $pivotIds, $pivotIdsAttributes) {
echo 'pivotUpdated';
echo get_class($model);
echo $relationName;
print_r($pivotIds);
print_r($pivotIdsAttributes);
});
static::pivotDetached(function ($model, $relationName, $pivotIds) {
echo 'pivotDetached';
echo get_class($model);
echo $relationName;
print_r($pivotIds);
});
...
class Role extends Model
{
....
For attach() or detach() one event is dispatched for both pivot ids.
Running this code
$user = User::first();
$user->roles()->attach(1);
You will see this output
pivotAttached
App\Models\User
roles
[1]
[1 => []]
Running this code
$user = User::first();
$user->roles()->attach([1]);
You will see this output
pivotAttached
App\Models\User
roles
[1]
[1 => []]
Running this code
$user = User::first();
$user->roles()->attach(Role::first());
You will see this output
pivotAttached
App\Models\User
roles
[1]
[1 => []]
Running this code
$user = User::first();
$user->roles()->attach(Role::get());
You will see this output
pivotAttached
App\Models\User
roles
[1, 2]
[1 => [], 2 => []]
Running this code
$user = User::first();
$user->roles()->attach([1, 2 => ['attribute' => 'test']], ['attribute2' => 'test2']);
You will see this output
pivotAttached
App\Models\User
roles
[1, 2]
[1 => [], 2 => ['attribute' => 'test', 'attribute2' => 'test2']]
For sync() method event is dispatched for each pivot row.
Running this code
$user = User::first();
$user->roles()->sync([1, 2]);
You will see this output
pivotAttached
App\Models\User
roles
[1]
[1 => []]
pivotAttached
App\Models\User
roles
[2]
[2 => []]
Running this code
$user = User::first();
$user->roles()->detach([1, 2]);
You will see this output
pivotAttached
App\Models\User
roles
[1, 2]
Running this code
$user = User::first();
$user->roles()->updateExistingPivot(1, ['attribute' => 'test']);
You will see this output
pivotUpdated
App\Models\User
roles
[1]
[1 => ['attribute' => 'test']]
MIT
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