ActiveModel ForbiddenAttributesError - ruby-on-rails

Question

Help me please. Rails swear...
What should I change? I allowed all parameters (permit_params), but this does not help:
ActiveModel::ForbiddenAttributesError
Extracted source (around line #17):
#user = User.where(id: params[:id]).first_or_create
#user.superadmin = params[:user][:superadmin]
#user.attributes = params[:user].delete_if do |k, v|
(k == "superadmin") ||
(["password", "password_confirmation"].include?(k) && v.empty? && !#user.new_record?)
end
"config.action_controller.permit_all_parameters = true" solves the problem. But I do not want to disable strong_parameters.
UPDATE
app/admin/user.rb
ActiveAdmin.register User do
form do |f|
f.inputs "User Details" do
f.input :email
f.input :password
f.input :password_confirmation
f.input :superadmin, :label => "Super Administrator"
end
f.actions
end
create_or_edit = Proc.new {
#user = User.where(id: params[:id]).first_or_create
#user.superadmin = params[:user][:superadmin]
#user.attributes = params[:user].delete_if do |k, v|
(k == "superadmin") ||
(["password", "password_confirmation"].include?(k) && v.empty? && !#user.new_record?)
end
if #user.save
redirect_to :action => :show, :id => #user.id
else
render active_admin_template((#user.new_record? ? 'new' : 'edit') + '.html.erb')
end
}
member_action :create, :method => :post, &create_or_edit
member_action :update, :method => :put, &create_or_edit
permit_params :authenticity_token, :commit, :id, user: [:email, :password, :password_confirmation, :superadmin]
end
P.S. I worked on this guide.
The problem is very similar to this problem: I get ActiveModel::ForbiddenAttributesError with Active Admin and Devise I get this error when I create a new user in the administration panel ActiveAdmin.
UPDATE1
console
Started POST "/admin/users" for 127.0.0.1 at 2017-12-08 22:57:04 +0300
Processing by Admin::UsersController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"***********", "user"=>{"email"=>"test#test.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]", "superadmin"=>"0"}, "commit"=>"Create User"}
User Load (1.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1], ["LIMIT", 1]]
User Load (0.9ms) SELECT "users".* FROM "users" WHERE "users"."id" IS NULL ORDER BY "users"."id" ASC LIMIT $1 [["LIMIT", 1]]
(3.0ms) BEGIN
(0.4ms) ROLLBACK
Completed 500 Internal Server Error in 24ms (ActiveRecord: 5.2ms)
ActiveModel::ForbiddenAttributesError
ActiveModel::ForbiddenAttributesError):
app/admin/user.rb:17:in `block (2 levels) in <top (required)>'

Answer 1

I have to agree with the answer given to the question you referenced, per the doc please try:
permit_params :email, :password, :password_confirmation, :superadmin