How to pass a variable to view on render in Rails?

Question

Ruby on Rails

Let's say we passed some variable to the create page. And this variable is used in this page. And in the process of adding, during validation, the operation is not successful, and a redirect occurs in the controller, here is an example code:
format.html { render :new }
And an error occurs in the page due to the fact that that variable does not exist, and it is valid when rendering if the operation is not successful (as in the code) nothing is transmitted. But how can you convey?

Answer 1

It is transmitted like this:<%= render :new, object: @new_customer %>

Answer 2

Less b "I".
And be clearer about your desires.
A render does not equal a redirect.
You can't redirect in the controller to fix validation errors.
In a controller action, it doesn't matter what you render and under what conditions. In any case, all instance variables will be available.