ActiveScope.php

<?php

class ActiveScope implements ScopeInterface
{
    /**
     * Apply the scope to a given Eloquent query builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    public function apply(Builder $builder)
    {
        $builder->whereActive(1);
    }

    /**
     * Remove the scope from the given Eloquent query builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    public function remove(Builder $builder)
    {
        $query = $builder->getQuery();

        unset($query->wheres['active']);
    }
}


class Post extends Eloquent
{
    public static function boot() {
        parent::boot();

        static::addGlobalScope(new ActiveScope);
    }
}