尝试从另一个控制器获取变量 response_to

Question

I have a controller named Orders , and another one named Customers . So, on my Order I want to save who my customer is. These two models have associations.

So, in my new order view, I used one form to bring who the customer is by his "cpf" (cpf is a document that we use here in Brazil to identify citizens), and I did this:

<%= form_tag search_customer_path, method: :get do %>
  <%= text_field_tag :cpf, params[:cpf], placeholder: 'CPF' %>
  <%= button_tag type: :submit, class: "btn btn-primary" do %>
    <%= 'Selecionar' %>
  <% end%>
<% end%>

To make this search_costumer_path and make the checkout_path (that we'll use later on), i dit this to routes.rb :

get '/cart/checkout', to: 'orders#new', as: :checkout #-> This gives me the checkout_path
get 'search_customer', to: 'customers#search_customer'

And on my customers_controller.rb I did this:

def search_customer
  @customer = Customer.find_by!(cpf: params[:cpf])
  respond_to do |format|
    format.html { redirect_to checkout_path } #-> @customer should be available in the checkout_path view, but it's not
  end
end

The problem is that when the app goes back to the checkout_path , @customer is nil .

Aditional information: To try to find the error, I replaced the customers_controller 's search_customer action to byebug , so I could handcode on the server to see if the params are passing and the variable is being set, and there I have no problem. I got something like this:

Input> params
Return> <ActionController::Parameters {"cpf"=>"05864899995", "button"=>"", "controller"=>"customers", "action"=>"search_customer"} permitted: false>
Input> @customer = Customer.find_by(cpf: params[:cpf])
Return> #<Customer id: 2, name: "Thiago Fiorese", cpf: "05864899995", cel_phone: "83984572906", email: "thiagofiorese@gmail.com", address: "Rua Helena Meira Lima", neighborhood: "Tambaú", city: "João Pessoa", state: "PB", zipcode: "58039081", complement: "Apto 1001", reference: "Ao lado do Motiva", created_at: "2020-01-20 19:36:16", updated_at: "2020-01-20 19:36:16", number: "691">
Input> @customer.name
Return: "Thiago Fiorese"

So... the params are passing, and the variable theoretically is being saved since I used the same code on my search_customer action. I'm guessing the problem is sending that variable back to the checkout page (orders controller) with the respond_to , since when I'm redirected back to checkout_path , the @customer is nil .

If you need this info: this app is a point-of-sale, so the user making the order is the shop owner or his employees, and the customer will not have access to the app, but should be saved on the order for statistics purposes.

Answer 1

You could just pass the @customer.id variable as a parameter like so:

respond_to do |format|
  format.html { redirect_to checkout_path(customer_id: @customer.id }
end

and then in your orders_controller

def new
  @customer = Customer.find(params[:customer_id])
  ...
end