Calling save() on a model will update every row in the database - php

Question

I've got the following function in a migration file. The migration is to add a new column, and then update the columns of the existing entries:
<?php
private function updatePlans()
{
$plans = PlanProvider::query()->get();
foreach ($plans as $plan) {
$plan->num_adults = 1;
if (stripos($plan->rate_name, 'couple') !== false) {
$plan->num_adults = 2;
}
$plan->save();
}
}
Now, what's happening here is that when I call save(), it's updating EVERY model, instead of the one inside the loop. I have a similar function for another migration, and it works as expected. Why would this update every model rather than just the one?

Answer 1

$plans is a Collection that contains all your "plans".
Your $plan->save(); is outside your if conditions, so obviously it updates every single row, no matter if it has 1 or 2 num_adults

Answer 2

public function store(Request $request)
{
$this->validate($request,[
'email' => 'required|email|unique:subscribers'
]);
$subscriber = new Subscriber();
$subscriber->email = $request->email;
$subscriber->save();
Toastr::success('You are Successfully Added Our Subscriber List:)','Success');
return redirect()->back();
}

Answer 3

you can try this
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class PlanProvider extends Model
{
protected $table = 'plan_provider';
protected $guarded = [];
public $timestamps = false;
}
private function updatePlans()
{
$plans = PlanProvider::findOrFail(id);
$plans->num_adults = 1;
$plans->save();
return redirect()->back();
}