Eloquent select rows with empty string or null value

I always encourage to create queries with the main Laravel functions that are most used. That's why you must have 2 things in mind:

• algorithm. key1 = value1 AND key2 = value2 OR key3 = value3. Be very carreful about precedence because in the way I exemplified there will be a main OR not an AND with OR inside
• using where(), whereIn(), whereNull and closure instead of whereRaw(). whereRaw is using more memory than any others I mentioned.

So, to resume your answer:

OR condition

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

AND and OR condition

$users = DB::table('users')
->where(function($query) { $query->where('col','=','')->orWhere('col','=','')->whereNull('col'); })
->where('col','=','')
->get();

Try this query:

$users = DB::table('users')
        ->whereRaw('col = "" OR col IS NULL')
        ->get();

How about this:

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

This way you can check both conditions at the same time

Try using orWhereNull for the second clause:

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