Mysql,Php,Laravel checkbox error - php

Question

I have the next question. How can I solve that problem? I have two tables vehicles and vehicles_extras. In the first table have a lot of columns. In the second table I have only 4 columns:
id, vehicle_id, vehicletype, vehicle_extra
The id is autoincrement, the vehicle_id is from the first table the id column, the 'vehicletype' is a string, type of the vehicle, the vehicle_extra is the number of the extras.
So I have a search form,where is the extras are checkboxes, extra[]. In a web.php I have this code:
$data1=DB::table('vehicles_extras')->where('vehicletype','$vt')->where('vehicle_extra',$extras);
....
if(Input::has('extras'))
$query->union($data1);
$data=$query->get();
for that I get error:
SQLSTATE[21000]: Cardinality violation: 1222 The used SELECT statements have a different number of columns (SQL: (select count(*) as aggregate from vm_vehicles where vehicletype = car) union (select * from vm_vehicles_extras where vehicletype = car and vehicle_extra = 2))
But ok, let's say it's working, but I have array with more values, so I want to use whereIn .
Any idea? I use Laravel 5.3.

Answer 1

First, you have to create one-to-many relation between vehicles and vehicles_extras.
Add the following relation in your Vehicle model:
public function vehicleExtras()
{
return $this->hasMany('App\VehicleExtra');
}
Then you can query it as:
Vehicle::whereHas('vehicleExtras', function ($q) use($extra) {
$q->where('vehicletype', 'car')
->whereIn('vehicle_extra', $extra);
})->get();