How to delete data with foreign key? - laravel

Question

I need some help to delete a movie from my database.
I know that since I have pivot tables I will get some troubles with foreign key(my delete controller gives this error), but I don't know how to solve it.
The error i'm getting is the following:
SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (sakila.film_category, CONSTRAINT fk_film_category_film FOREIGN KEY (film_id) REFERENCES film (film_id) ON UPDATE CASCADE) (SQL: delete from film where film_id = 999)
My database tables
Here are my models:
model Film:
class film extends Model{
protected $table = "film";
protected $primaryKey = 'film_id';
public $timestamps = false;
use HasFactory;
protected $sql=['film_id', 'title', 'length'];
public function category(){
return $this->belongsToMany(category::class,'film_category', 'film_id', 'category_id');
}
public function actor(){
return $this->belongsToMany(actor::class,'film_actor', 'film_id', 'actor_id');
}
}
model Category:
class category extends Model{
protected $table = "category";
protected $primaryKey = 'category_id';
public $timestamps = false;
use HasFactory;
protected $sql=['category_id','name'];
public function film(){
return $this->belongsToMany(film::class,'film_category', 'category_id', 'film_id');
}
}
model Actor:
class actor extends Model{
protected $primaryKey = 'actor_id';
public $timestamps = false;
use HasFactory;
protected $sql=['actor_id', 'first_name', 'last_name'];
public function film(){
return $this->belongsToMany(film::class,'film_actor', 'actor_id', 'film_id');
}
}
Now I need some help to make my controller function to delete records.
public function remove($film_id){
$film=film::findOrFail($film_id);
$film->delete();
return redirect('/film/view');
Thanks

Answer 1

To delete a movie, you must first delete the records from the Film_category and Film_actor table before you can delete your record from the Film table.
Instead do something like :
(assuming you have created your models from the Film_category and Film_actor tables)
public function remove($film_id){
$film_category = FilmCategory::where('film_id', $film_id)->delete();
$film_actor = FilmActor::where('film_id', $film_id)->delete();
$film = film::findOrFail($film_id);
$film->delete();
return redirect('/film/view');
}