Eloquent select rows with empty string or null value

问题

I have something like $user->albums()->where('col', NULL), it works fine then I tried to extend it to empty strings with $user->albums()->where('col', NULL)->or_where('col', '') and it's not working.

Also I saw on this post that I could use where_null('col') but it's not working and it's not documented. Any simple method to select where empty or NULL col

回答1:

Try using orWhereNull for the second clause:

$users = DB::table('users')
        ->where('col', '=', '')
        ->orWhereNull('col')
        ->get();

回答2:

How about this:

$user->albums()->whereRaw("NOT col > ''")

This way you can check both conditions at the same time

回答3:

Not sure, but this might work:

$user->albums()->where_in('col', array(NULL,''));

来源：https://stackoverflow.com/questions/20706874/eloquent-select-rows-with-empty-string-or-null-value