Rails 4. Moving form information from one controller (with no model), to another (no model) in order to pass arguments to a method - ruby

Question

I have a simple app where users will be able to purchase items. On item pages there will be an add to cart button. The carts-controller displays the items using REDIS relationship, it has no model. Once the user has reviewed the items and wishes to buy, they will be directed to purchases view where once they pay with stripe, an order will be created in purchases-controller. The purchases controller also has no model.
The user.rb model:
class User < ActiveRecord::Base
has_many :orders
def get_cart_items
cart_ids = REDIS.smembers "cart#{id}"
Item.find(cart_ids)
end
def purchase_cart_items!(recipient_name:, recipient_address:)
get_cart_items.each { |item| purchase!(item, recipient_name, recipient_address) }
REDIS.del "cart#{id}"
end
def purchase!(item, recipient_name, recipient_address)
self.orders.create!(user_email: self.email,
item_id: item.id,
recipient_name: recipient_name)
recipient_address: recipient_address)
end
end
The purchases-controller:
class PurchasesController < ApplicationController
def create
Stripe::Charge.create(
...
)
##########
current_user.purchase_cart_items!(recipient_name:, recipient_address:)
##########
end
end
The carts-controller:
class CartsController < ApplicationController
def create
REDIS.sadd current_user_cart, params[:item_id]
end
def destroy
REDIS.srem current_user_cart, params[:item_id]
end
end
Creating the Order attributes of user_email: and item_id: is easy by calling self.email and item.id since they are attached to a model, but I am unsure of how to use a form in the carts view to have the user input the recipient_name: and recipient_address: arguments for purchase_cart_items!(recipient_name:, recipient_address:) method in the purchases-controller.
I need to:
Create a form in the carts view where the user can input arguments for a method in another controller
Upon submission of the form details, I need the user to be redirected to purchases view
The form information has to be then passed as an argument to a method in the purchases-controller
Thanks!

Answer 1

A form_tag with a GET method needs to be used in order to submit the form info to the right controller.
In the carts view:
<%= form_tag({controller: "purchases", action: "new"}, method: "get") do %>
<%= label_tag 'recipient name: ' %>
<%= text_field_tag 'recipient_name' %>
<%= label_tag 'recipient address: ' %>
<%= text_field_tag 'recipient_address' %>
<%= submit_tag "PAY" %>
<% end %>
Once in the new action of the purchases-controller I used params to get the form info and session to make the form information available to the create action in the same controller:
class PurchasesController < ApplicationController
def new
#name = params[:name]
#address = params[:address]
session[:name] = #name
session[:address] = #address
end
def create
Stripe::Charge.create(
...
)
##########
#name = session[:name]
#address = session[:address]
current_user.purchase_cart_destinations!(name: #name, address: #address)
##########
end
end
Once the form information was accessible in the create action of purchases-controller, the keyword arguments for current_user.purchase_cart_items! were easy to set with instance variables of #name and #address.