Possible missing value with parameters in Rails app - ruby-on-rails

Question

I'm new to Rails and I have no idea what's going on here. The app I am building is an online store. The current functionality works, but the change I am trying to implement isn't working. As a starting point, I will show the working version that I have now. Here is my carts/show.html.erb file:
<p id="notice"><%= notice %></p>
<h2>My Cart</h2>
<table class="table table-responsive table-striped">
<thead>
<tr>
<th>Item</th>
<th>Quantity</th>
<th>Total Price in Galleons</th>
<th>Total Price in Muggle Currency</th>
</tr>
<tbody>
<%= render(#cart.line_items) %>
<tr>
<td>Total</td>
<td><%= number_to_currency(#cart.total_price * 7.35) %></td>
<td></td>
<td></td>
</tr>
</tbody>
</thead>
</table>
<br>
<div class="row">
<div class="col-md-3">
<div class="row">
<div class="col-md-4">
<%= link_to 'Back', products_path, :class => 'btn btn-primary whiteText' %>
</div>
<div class="col-md-4">
<%= link_to "Checkout", new_charge_path, :class => 'btn btn-success whiteText' %>
</div>
<div class="col-md-4">
<%= link_to 'Empty Cart', #cart, method: :delete, data: {confirm: 'Are you sure you want to empty your cart?'}, :class => 'btn btn-danger whiteText' %>
</div>
</div>
</div>
<div class="col-md-9"></div>
</div>
However, I am wanting to change the workflow a bit so that it uses my Order scaffold to redirect the user to an address confirmation page (orders/new.html.erb) after clicking "Checkout" on the Cart show page. Once the address is confirmed, it should then route the customer to the payments page, which is what the new_charge_path in my current Checkout link redirects to already.
So to start with, I am replacing the Checkout link and turning it from this:
<%= link_to "Checkout", new_charge_path, :class => 'btn btn-success whiteText' %>
to this:
<%= link_to "Checkout", new_order_path, method: :get, :class => 'btn btn-success whiteText' %>
This redirect functions as expected, and takes me to orders/new.html.erb, which contains the following:
<h1>Order Information</h1>
<br>
<%= render 'form', order: #order %>
<%= link_to 'Back', products_path %>
The form it renders contains the following code:
<%= form_for(order) do |f| %>
<% if order.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(order.errors.count, "error") %> prohibited this order from being saved:</h2>
<ul>
<% order.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="row">
<div class="col-md-6">
<div class="field">
<%= f.label :first_name %>
<%= f.text_field :first_name, size: 20, :value => current_user.first_name, :class => "form-control" %>
</div>
<div class="field">
<%= f.label :last_name %>
<%= f.text_field :last_name, size: 20, :value => current_user.last_name, :class => "form-control" %>
</div>
<div class="field">
<%= f.label :address %>
<%= f.text_area :address, size: 40, :value => current_user.address, :class => "form-control" %>
</div>
<div class="field">
<%= f.label :city %>
<%= f.text_area :city, size: 20, :value => current_user.city, :class => "form-control" %>
</div>
<div class="field">
<%= f.label :state %>
<%= f.text_area :state, size: 2, :value => current_user.state, :class => "form-control" %>
</div>
<div class="field">
<%= f.label :email %>
<%= f.text_field :email, size: 40, :value => current_user.email, :class => "form-control" %>
</div>
<div class="field">
<%= f.label :pay_type %>
<%= f.select :pay_type, Order.pay_types.keys, prompt: 'Select a payment method', :class => "form-control" %>
</div>
</div>
<div class="col-md-6">
<%= form_tag(payments_path, class: "form-inline") do %>
<%= hidden_field_tag(:purchase_amount_cents, #cart.total_price) %>
<div class="form_group">
<%= label_tag(:credit_card_number, "Credit Card Number", class: "sr-only") %>
<%= text_field_tag(:credit_card_number, "", class: "form-control", placeholder: "Credit Card #") %>
</div>
<br>
<div class="form_group">
<%= label_tag(:expiration_month, "Month", class: "sr-only") %>
<%= text_field_tag(:expiration_month, "", class: "form-control", placeholder: "Month") %>
<br>
<%= label_tag(:expiration_year, "Year", class: "sr-only") %>
<%= text_field_tag(:expiration_year, "", class: "form-control", placeholder: "Year") %>
<br>
<%= label_tag(:cvc, "Year", class: "sr-only") %>
<%= text_field_tag(:cvc, "", class: "form-control", placeholder: "CVC #") %>
</div>
<br>
<div class="form_group">
<%= submit_tag("Purchase Cart", class: "btn btn-default", id: "purchase") %>
</div>
<% end %>
</div>
</div>
<hr>
<div class="actions">
<%= f.submit 'Proceed to Payment' %>
</div>
<% end %>
The payment options are credit card (Stripe) or Paypal. I will eventually add the Paypal functionality but Stripe API is all I have for now.
Here is my Order Controller:
class OrdersController < ApplicationController
include CurrentCart
before_action :set_cart, only: [:new, :create]
before_action :ensure_cart_isnt_empty, only: :new
before_action :set_order, only: [:show, :edit, :update, :destroy]
# GET /orders
# GET /orders.json
def index
#orders = Order.all
end
# GET /orders/1
# GET /orders/1.json
def show
end
# GET /orders/new
def new
#order = Order.new
end
# GET /orders/1/edit
def edit
end
# POST /orders
# POST /orders.json
def create
#order = Order.new(order_params)
#order.add_line_items_from_cart(#cart)
respond_to do |format|
if #order.save
format.html { redirect_to new_charge_path}
else
format.html { render :new }
format.json { render json: #order.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /orders/1
# PATCH/PUT /orders/1.json
def update
respond_to do |format|
if #order.update(order_params)
format.html { redirect_to #order, notice: 'Order was successfully updated.' }
format.json { render :show, status: :ok, location: #order }
else
format.html { render :edit }
format.json { render json: #order.errors, status: :unprocessable_entity }
end
end
end
# DELETE /orders/1
# DELETE /orders/1.json
def destroy
#order.destroy
respond_to do |format|
format.html { redirect_to orders_url, notice: 'Order was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_order
#order = Order.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def order_params
params.require(:order).permit(:first_name, :last_name, :address, :city, :state, :email, :pay_type)
end
def ensure_cart_isnt_empty
if #cart.line_items.empty?
redirect_to products_path, notice: 'Your cart is empty!'
end
end
end
Here is my Charge Controller:
class ChargesController < ApplicationController
include CurrentCart
before_action :set_cart, only: [:new, :create]
def new
end
def create #METHOD IS CALLED AFTER PAYMENT IS MADE
# Amount in cents
#amount = #cart.total_price
customer = Stripe::Customer.create(
:email => params[:stripeEmail],
:source => params[:stripeToken]
)
charge = Stripe::Charge.create(
:customer => customer.id,
:amount => #amount,
:description => 'Customer',
:currency => 'usd'
)
Cart.destroy(session[:cart_id])
rescue Stripe::CardError => e
flash[:error] = e.message
redirect_to new_charge_path
end
end
Here's the problem. While the redirects work as expected, the #amount in the Charge controller is set to $0.00 if the order controller is used. If, however, the Cart links directly to the Charge controller, then the correct dollar amount is used. So, I am assuming that somehow the cart object is being lost or having its value reset.
Here is my set_cart method:
def set_cart
#cart = Cart.find(params[:id])
end
And here is my CurrentCart module:
module CurrentCart
private
def set_cart
#cart = Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
#cart = Cart.create
session[:cart_id] = #cart.id
end
end

Answer 1

My idea you need to passing forward the value #cart.total_price from cart show form to order controller here some steps to do
inside your link (you pass the value as params)
<%= link_to "Checkout", new_order_path(total_price: #cart.total_price), method: :get, :class => 'btn btn-success whiteText' %>
inside order_controller (you get the params and put in instance variabel)
# GET /orders/new
def new
#order = Order.new
#temp_total_price = params[:total_price]
end
inside order_form insert between your form_for tag, we need to put this in the form as hidden value, so it can be passing to create method for charge
<%= hidden_field_tag 'total_price', #temp_total_price %>
inside your class ChargesController create method you can get the total_price
#total_price = params[:total_price]
I know it's little bit log but probably this can help