Laravel - Mysql get elements from join table - mysql

Question

I am getting the total carOwnerDept(department id) from cars table which has relation with department table
but i can't get the issue from cars table.
Here's the code
$dept = DB::table('department')
->select('department.name', DB::raw('COUNT(cars.carOwnerDept) AS dept_count'))
->join('cars', 'department.id', '=', 'cars.carOwnerDept')
->select('department.name', 'cars.issue')
->groupBy('department.name')
->where('cars.carType', '=', 'Internal Customer')
->whereDate('cars.created_at', '>=', $from)
->whereDate('cars.created_at', '<=', $to)
->get();
Views
<table>
<tr>
<th>Department</th>
<th>Issues</th>
<th>Total</th>
</tr>
#foreach($dept as $depts)
<tr>
<td>{{$depts->name}}</td>
<td>{{$depts->issue}}</td>
<td>{{$depts->dept_count}}</td>
</tr>
#endforeach
</table>
DB Structure
cars
id | carOwnerDept | issue
1 1 barcode problem
2 3 scanner problem
3 2 barcode problem
department
id | name
1 QA
2 PP
3 PE

Answer 1

You may get the number of car owner departments as shown below.
$dept = DB::table('department')
->select(DB::raw('(SELECT COUNT(carOwnerDept) FROM cars WHERE carOwnerDept=department.id) AS dept_count'))
->join('cars', 'department.id', '=', 'cars.carOwnerDept')
->select('department.name', 'cars.issue')
->where('cars.carType', '=', 'Internal Customer')
->whereDate('cars.created_at', '>=', $from)
->whereDate('cars.created_at', '<=', $to)
->get();

Answer 2

I highly recommend that you create functions on your models so that you don't need to input raw queries. Fewer codes and easier to understand.

Answer 3

Try This.
$dept = DB::table('department')
->join('cars', 'department.id', '=', 'cars.carOwnerDept')
->select('department.name', DB::raw('COUNT(cars.carOwnerDept) AS dept_count'), 'cars.issue')
->where('cars.carType', '=', 'Internal Customer')
->whereDate('cars.created_at', '>=', $from)
->whereDate('cars.created_at', '<=', $to)
->groupBy('department.name')
->get();