laravel hide result for all relations if column has specific value - laravel

Question

Lets assume I have a table posts with the fields id and content and published.
A User can have multiple posts, and a post can belong to multiple pages and there might be a lot more relations to a post.
Lets say we have an admin that wants to moderate the posts, the posts should only be visible if approved. So I add the boolean published where posts that are not published 0 should never be visible (only in specific cases e.g. to moderate the post).
Is it possible to set something in the Post model to restrict the related models from loading non published posts.
I want to avoid that I have to filter in the relation, e.g. if I call $user->posts I do not want to check if the posts are published, the non published results should not be available only if i do a search like. Post::where('published','0'). Basically something like softdeletes but than with a custom field.
An example, where the opposite relations are also defined, to make it easier to understand would be:
class Post extends Model
{
use SoftDeletes;
protected $table = 'posts';
public function collection()
{
return $this->belongsTo('App\Collection');
}
public function style()
{
return $this->belongsTo('App\Style');
}
public function pictures()
{
return $this->hasMany('App\Picture')->orderBy('priority', 'asc');
}
public function user()
{
return $this->belongsTo('App\User');
}
}

Answer 1

You can use global query scope in the Model as below to add your desired filters to each query, like below:
// Post.php
class Post extend Model
{
protected static function booted()
{
static::addGlobalScope('published', function (Builder $builder) {
$builder->where('published', true);
});
}
// ...
}
Whenever you don't want to apply the global query scope, use withoutGlobalScope with the name of the query scope, like below:
Post::withoutGlobalScope('published')->get();