insert computed data in table in laravel - database

Question

I need to store interest_amount which is computed using get_Attribute function however now I need to insert it into table.
I have used static::saving function to compute interest_amount I don't know how to call it using $data in controller
Loan.php
use Illuminate\Database\Eloquent\Model;
class Loan extends Model
{
protected $fillable = [
'amount',
'interest',
'status',
'duration',
'member_id',
'loan_type_id',
'interest_type_id',
'loan_payment_type_id'
];
protected $appends = 'interest_amount';
public function getInterestAmountAttribute()
{
return ($this->amount)/100 * $this->interest;
}
public function member()
{
return $this->belongsTo(Member::class,'member_id','id');
}
protected static function boot()
{
parent::boot();
static::saving(function($model) {
$model->interest_amount = ($model->amount/100 ) * $model->interest;
});
}
}
LoanController.php
$data['amount'] = $request->amount;
$data['interest'] = $request->interest;
$data['interest_amount'] = $interest_amount;
$data['duration'] = $request->duration;
$data['status']= $request->status;
$data['member_id'] = $request->name;
$data['loan_type_id']= $request->loan_type;
$data['interest_type_id']= $request->interest_type;
$data['loan_payment_type_id']= $request->payment;
if(DB::table('loans')->insert($data)){
return redirect()->route('loan')->with('success','data was successfuly inserted');
}
I initially didn't have interest_amount column but I added it later. I don't know how to call the saving function with the approach I have used in my controller.

Answer 1

Model events will not fire when you use the query builder to insert data into your tables.
You have to use the Model to save the data, something like this:
If your model attributes are mass assignable:
if((new Loan($data))->save()){
return redirect()->route('loan')->with('success','data was successfuly inserted');
}
otherwise:
$loan = new Loan;
$loan->amount = $request->amount;
$loan->interest = $request->interest;
$loan->interest_amount = $interest_amount;
$loan->duration = $request->duration;
$loan->status = $request->status;
$loan->member_id = $request->name;
$loan->loan_type_id = $request->loan_type;
$loan->interest_type_id = $request->interest_type;
$loan->loan_payment_type_id = $request->payment;
if($loan->save()){
return redirect()->route('loan')->with('success','data was successfuly inserted');
}