How do i change a column's reference table in laravel 7 - database

Question

I made a mistake when i was building database, so as you will see in codes, my "order_id" column in "baskets" table is referenced from "customers" table but it should have been from "orders" table,
public function up()
{
Schema::create('baskets', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('firm_id');
$table->foreign('firm_id')
->references('id')->on('firms')
->onDelete('cascade');
$table->unsignedBigInteger('customer_id');
$table->foreign('customer_id')
->references('id')->on('customers')
->onDelete('cascade');
$table->unsignedBigInteger('order_id');
$table->foreign('order_id')
->references('id')->on('customers')
->onDelete('cascade');
$table->unsignedBigInteger('service_id');
$table->foreign('service_id')
->references('id')->on('services')
->onDelete('cascade');
$table->decimal('price', 11, 2);
$table->integer('quantity')->default(1);
$table->string('note')->nullable();
$table->timestamps();
});
}
So how can i change its reference table from "customers" to "orders" table.
Thank you all in advance.

Answer 1

You should be looking at the dropForeign method (scroll down a little).
This method accepts an $index argument. The documentation already shows how to write this $index. Looking at the source code you can also see how this index is being generated. At some point the createIndexName method is being called during the foreign call.
Looking at your code and the createIndexName method, we could guess the index name that is being created:
baskets_order_id_foreign
To round it up you might be able remove the foreign key by executing the following:
public function up()
{
Schema::table('baskets', function (Blueprint $table) {
$table->dropForeign('baskets_order_id_foreign');
// Add your new foreign key
});
}