Save dynamic data to two tables using relationship in Laravel - laravel

Question

I have two tables Students and Hobbies. I've all details in one form but I want to save details to separate tables on submit. How can I achieve this?
My Student model
<?php
namespace App;
class Students extends Model {
protected $fillable = ['name', 'address'];
public function hobbies() {
return $this->hasMany(Hobby::class);
}
}
Hobby model:
<?php
namespace App;
use App\Product;
class Hobby extends Model
{
protected $fillable = [
'entertainment', 'sports'
];
public function hobby()
{
return $this->belongsTo(Student::class);
}
}
Controller:
public function save(Request $request, Student $student)
{
$students= new Student;
$students->name= request('name');
$students->address= request('address');
$students->save();
if($students->save())
{
$hobbies= [];
$images = $request->file('hob_img');
$hob_desc = $request->hob_desc;
foreach ($request->hob_name as $key => $hobby) {
$hob_img = '';
{
$hob_img = uniqid() . '.' . $files[$key]->getClientOriginalExtension();
$files[$key]->move(public_path('/assets/images/'), $hob_img);
}
$hobbies[] = [
'hob_name' => $hobby,
'hob_desc' => $hob_desc[$key],
'hob_img' => $hob_img
];
}
$hobbies[] = new Hobby;
$hobbies->hob_name = request('hob_name')[$key];
$hobbies->hob_desc= request('hob_desc')[$key];
$hobbies->hob_img = request($hob_img)[$key];
$hobbies->save();
}
}
But I cannot save it. It says SQLSTATE[HY000]: General error: 1364 Field 'student_id' doesn't have a default value

Answer 1

Try the insert to save many records at onece :
public function save(Request $request, Student $student)
{
$student= new Student;
$student->name= request('name');
$student->address= request('address');
if($student->save())
{
$hobbies= [];
$images = $request->file('hob_img');
$hob_desc = $request->hob_desc;
foreach ($request->hob_name as $key => $hobby) {
$hob_img = '';
$hob_img = uniqid() . '.' . $files[$key]->getClientOriginalExtension();
// $files i think it should be $images
$files[$key]->move(public_path('/assets/images/'), $hob_img);
$hobbies[] = [
'hob_name' => $hobby,
'hob_desc' => $hob_desc[$key],
'hob_img' => $hob_img,
'student_id'=> $student->id
];
}
Hobby::insert($hobbies); // useing Eloquent
// Or you can use Query Builder
// DB::table('hobbies')->insert($hobbies);
}
}