[9.x] Define a new method to create a through model

[hafezdivandari]

It is helpful to have a customizable method for creating a new model instance for a through model without overriding the whole hasOneThrough or hasManyThrough methods. It is just as useful as newRelatedInstance method.

[taylorotwell]

Can you describe your use case for this?

[hafezdivandari]

@taylorotwell sure, I wanted to pass the table name instead of the class and set the through model's table dynamically, something like this:

protected function newRelatedThroughInstance($resource)
{
    return (new \App\Models\Entity)->setTable($resource);
}

As I said in the comment above, the use case can be setting the model's connection or table conditionally/dynamically just like newRelatedInstance method.