Update failed with hasManyThrough relationship in laravel

Question

I'm trying to update child model with Laravel hasManyThough.

What I've tried

The Base model has the relationship like below:

public function transactions()
{
    return $this->hasManyThrough('App\Transaction', 'App\Invoice');
}

and I use below code to update child items.

$order->transactions()->update([
        'customer_id' => 100,
        'user_id'     => 100
    ]);

What I'm getting

SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'customer_id' in field list is ambiguous (SQL: update `invoice_items` inner join `invoices` on `invoices`.`id` = `invoice_items`.`invoice_id` set `customer_id` = 2, `user_id` = 2, `updated_at` = 2018-09-21 22:03:45 where `invoices`.`order_id` = 1)

I'm using laravel 5.6 and the model is default as artisan make:model provide.

Update:

Table structure

orders
- id
- user_id
- customer_id
- content
invoices
- id
- order_id
- user_id
- customer_id
- content
transactions
- id
- invoice_id
- user_id
- customer_id
- content

Answer 1

For now, I made a temp solution for this issue.

foreach ($order->transactions as $transaction) {
        $transaction->update($updateRules);
    }

Please feel free to post your solution.

Answer 2

Here is solution:

Column 'customer_id' in field list is ambiguous,ie customer_id field exists in both the tables using for inner join. Use customer_id with table name using Dot (.) operator.

update invoice_items inner join invoices on invoices . id = invoice_items . invoice_id set invoices. customer_id = 2, invoices. user_id = 2, updated_at = 2018-09-21 22:03:45 where invoices . order_id = 1)