check if value change laravel

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1if($product->isDirty()){
2    // changes have been made
3}
4

1If you want to check if the model is dirty just call isDirty():
2
3if($product->isDirty()){
4    // changes have been made
5}
6Or if you want to check a certain attribute:
7
8if($product->isDirty('price')){
9    // price has changed
10}
11
12refrence: https://stackoverflow.com/questions/28866500/laravel-eloquent-update-just-if-changes-have-been-made

1class UserObserver
2{
3
4
5    /**
6     * Listen to the User created event.
7     *
8     * @param  \App\User  $user
9     * @return void
10     */
11    public function updating(User $user)
12    {
13      if($user->isDirty('email')){
14        // email has changed
15        $new_email = $user->email; 
16        $old_email = $user->getOriginal('email');
17      }
18    }
19
20}
21

1protected function performUpdate(Builder $query, array $options = [])
2{
3    $dirty = $this->getDirty();
4
5    if (count($dirty) > 0)
6    {
7        // runs update query
8    }
9
10    return true;
11}

1You can use "$product->getChanges()" on Eloquent model even after persisting.

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