ExpiredPosting.php

trait ExpiredPosting {
    /**
     * Boot the soft deleting trait for a model.
     *
     * @return void
     */
    public static function bootExpiredPosting()
    {
        static::addGlobalScope(new ExpiredPostingScope);
    }
    /**
     *
     * Get the name of the column for applying the scope.
     *
     * @return string
     */
    public function getPostEndingAtColumn()
    {
        return defined('static::POST_ENDING_AT_COLUMN') ? static::POST_ENDING_AT_COLUMN : 'post_ending_at';
    }
    /**
     * Get the fully qualified column name for applying the scope.
     *
     * @return string
     */
    public function getQualifiedPostEndingAtColumn()
    {
        return $this->getTable().'.'.$this->getPostEndingAtColumn();
    }
    /**
     * Get a new query builder that includes soft deletes.
     *
     * @return \Illuminate\Database\Eloquent\Builder|static
     */
    public static function withExpired()
    {
        return (new static)->newQueryWithoutScope(new ExpiredPostingScope());
    }
}

ExpiredPostingScope.php

class ExpiredPostingScope implements ScopeInterface {
    /**
     * Apply the scope to a given Eloquent query builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @param  \Illuminate\Database\Eloquent\Model  $model
     * @return void
     */
    public function apply(Builder $builder, Model $model)
    {
        $column = $model->getQualifiedPostEndingAtColumn();
        $builder->where($column,">=", Carbon::now());
    }
    /**
     * Remove the scope from the given Eloquent query builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @param  \Illuminate\Database\Eloquent\Model  $model
     * @return void
     */
    public function remove(Builder $builder, Model $model)
    {
        $column = $model->getQualifiedPostEndingAtColumn();
        $query = $builder->getQuery();
        foreach ((array) $query->wheres as $key => $where)
        {
            if($where['column'] == $column){
                unset($query->wheres[$key]);
                $query->wheres = array_values($query->wheres);
            }
        }
    }
}