Laravel - how do i get the count data in query? - database

Question

This is the query in mysql
select e_id, h_name,
d_name,drf_name,credit_num,is_required,e_semester,stdate,endate,c_month,num
from(SELECT electcourse.id e_id,
h_id,d_id,ref_id,e_semester,stdate,endate,c_month,count(e_id) as num
FROM electcourse left join period on p_id= period.id left join
hospitalxdepartment on hd_id= hospitalxdepartment.id left join
board on electcourse.id= e_id where st_id= 'admin' group by
e_id) T left join hospital on h_id = hospital.id left join
department on d_id = department.id left join
departmentreference on ref_id = drfid where df_semester=105
This is my query in the laravel, but it got some error message.
public function get_course($st_id,$semester){
$from=DB::table('electcourse')
->selectRaw('electcourse.id as e_id','h_id','d_id','ref_id','e_semester','stdate','endate','c_month','count(e_id) as num',)
->leftjoin('period','p_id','period.id')
->leftjoin('hospitalxdepartment','hd_id','hospitalxdepartment.id')
->leftjoin('board','electcourse.id','e_id')
->where('st_id','=',$st_id)
->where('e_semester','=',$semester)
->groupBy('e_id');
$query=DB::query()
->select('e_id','h_name','d_name','drf_name','credit_num','is_required','e_semester','stdate','endate','c_month')
->fromSub($from, 'T')
->leftjoin('hospital','h_id','hospital.id')
->leftjoin('department','d_id','department.id')
->leftjoin('departmentreference','ref_id','drfid')
->where('df_semester','=',$semester)->orderBy('c_month')->get();
return $query;
}
I make sure it will be work if i didnt use count in the "select" string.
Have anyone know how to fix it with the correct count method?
error message : "Class App\Repositories\BoardRepository does not
exist"
This is mean DB format is wrong.

Answer 1

I find a way to generate a correct query, but it will get error message.
query function
public function get_course($st_id,$semester){
$from=DB::table('electcourse')
->select('electcourse.id as e_id','h_id','d_id','ref_id','e_semester','stdate','endate','c_month',DB::raw('count(e_id) as num'))
->leftjoin('period','p_id','period.id')
->leftjoin('hospitalxdepartment','hd_id','hospitalxdepartment.id')
->leftjoin('board','electcourse.id','e_id')
->where('st_id','=',$st_id)
->where('e_semester','=',$semester)
->groupBy('e_id');
$query=DB::query()
->select('e_id','h_name','d_name','drf_name','credit_num','is_required','e_semester','stdate','endate','c_month')
->fromSub($from, 'T')
->leftjoin('hospital','h_id','hospital.id')
->leftjoin('department','d_id','department.id')
->leftjoin('departmentreference','ref_id','drfid')
->where('df_semester','=',$semester)->orderBy('c_month')->get();
return $query;
}
Error message :
"SQLSTATE[42000]: Syntax error or access violation: 1055
'yangming567.electcourse.id' isn't in GROUP BY (SQL: select e_id,
h_name, d_name, drf_name, credit_num, is_required,
e_semester, stdate, endate, c_month from (select
electcourse.id as e_id, h_id, d_id, ref_id, e_semester,
stdate, endate, c_month, count(e_id) as num from electcourse
left join period on p_id = period.id left join
hospitalxdepartment on hd_id = hospitalxdepartment.id left
join board on electcourse.id = e_id where st_id = admin and
e_semester = 105 group by e_id) as T left join hospital on
h_id = hospital.id left join department on d_id =
department.id left join departmentreference on ref_id =
drfid where df_semester = 105 order by c_month asc)
However, i copy this error message query to Mysql, and it is work!!!!
Have anyone know how to fix my query in laravel?