wrong number of arguments (given 4, expected 0..1) after upgrading to Rails 6 - ruby-on-rails

Question

I just upgraded from Rails 5.2 to Rails 6 and I'm facing an issue in one class.
class Calculator < ApplicationRecord
def initialize(obj, user_id, calc_type, will_id = nil )
#inheritors = obj
super_obj = obj.clone.merge!(user_id: user_id, type: calc_type, will_id: will_id)
super(super_obj)
#shares = {}
#remains = RationalWithArgumentStore(0)
#stop_residual_shares = false
#special_case_apply = false
#rules = {}
#authorities = {}
end
end
and I'm creating new instance of the class like the following
calc = Calculator.new(obj, user_id, calc_type, nil)
It through an error saying:
wrong number of arguments (given 4, expected 0..1)
I spent two days searching and trying to fix the issue without any luck.
Your help is highly appreciated

Answer 1

This is happening because you are redefining initialize for a class that inherits from ApplicationRecord. It throws an error here. If you were to do the following it would work.
class Calculator
def initialize(obj, user_id, calc_type, will_id = nil)
#obj = obj
#user_id = user_id
#calc_type = calc_type
#will_id = will_id
end
end
Note that redefining initialize in this way is not recommended (see docs here), so if you can I would look into callbacks and see if you can accomplish your goal with that.
Hope that helps.

Answer 2

(Rails 6.x) One of my models had include Rails.application.routes.url_helpers.
If you have the same problem, remove it and manage your url methods by calling it directly as:
def my_link_function
# ... my code
my_link = Rails.application.routes.url_helpers.url_for([my_params]))
# ... other code
end