Eloquent запросы на 2 таблиц

Question

Im получая следующее сообщение об ошибке:

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'value' in 'where clause' (SQL: select sum(gross) as value, first_name from clients left join transactions on clients . id = transactions . client_id where value > 0 group by first_name)

С помощью этой функции?

$data = DB::table('clients')->leftjoin('transactions','clients.id','=','transactions.client_id') 
     ->select(DB::raw('sum(gross) as value, first_name')) 
     ->where('value','>',0) 
     ->groupBy('first_name') 
     ->get(); 

return $data; 

Answer 1

SQL is evaluated backwards, from right to left. So the where clause is parsed and evaluate prior to the select clause. Because of this the aliasing of sum(gross) to value has not yet occurred.

Aliases can be used in GROUP BY, ORDER BY, or HAVING clauses.

Таким образом, вместо того, чтобы использовать value в котором используйте sum(gross) в котором, как показано ниже.

$data = DB::table('clients')->leftjoin('transactions','clients.id','=','transactions.client_id') 
     ->select(DB::raw('sum(gross) as value, first_name')) 
     ->where('sum(gross)','>',0) 
     ->groupBy('first_name') 
     ->get(); 

return $data;