-1
結帳後我們有一個表格填寫用戶的數據，如果填不滿我們會出現錯誤，填充數據後如果我們點擊了Place Order，假設這會是數據庫的更新，但所有數據都從表單中消失，並且像第一次顯示錯誤一樣沒有數據。敏捷網站開發4 with rails 4訂單表
這裏是我的代碼：
/app/views/carts/_cart.html.erb：
<h2>Your Cart</h2>
<table>
<%= render(cart.line_items) %>
<tr class="total_line">
<td colspan="2">Total</td>
<td class="total_cell"><%= number_to_currency(cart.total_price) %></td>
</tr>
</table>
<!-- START_HIGHLIGHT -->
<%= button_to "Checkout", new_order_path, method: :get %>
<!-- END_HIGHLIGHT -->
<%= button_to 'Empty cart', cart, method: :delete,
data: { confirm: 'Are you sure?' } %>
/app/controllers/orders_controller.rb：
class OrdersController < ApplicationController
include CurrentCart
before_action :set_cart, only: [:new, :create]
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
if @cart.line_items.empty?
redirect_to store_url, notice: "Your cart is empty"
return
end
@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
Cart.destroy(session[:cart_id])
session[:cart_id] = nil
format.html { redirect_to store_url, notice:
'Thank you for your order.' }
format.json { render action: 'show', status: :created,
location: @order }
else
format.html { render action: '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 { head :no_content }
else
format.html { render action: '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 }
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(:name, :address, :email, :pay_type)
end
#...
end
/app/views/orders/new.html.erb：
<div class="depot_form">
<fieldset>
<legend>Please Enter Your Details</legend>
<%= render 'form' %>
</fieldset>
</div>
/app/views/orders/_form.html.erb：
<%= 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 |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br>
<!-- START_HIGHLIGHT -->
<%= f.text_field :name, size: 40 %>
<!-- END_HIGHLIGHT -->
</div>
<div class="field">
<%= f.label :address %><br>
<!-- START_HIGHLIGHT -->
<%= f.text_area :address, rows: 3, cols: 40 %>
<!-- END_HIGHLIGHT -->
</div>
<div class="field">
<%= f.label :email %><br>
<!-- START_HIGHLIGHT -->
<%= f.email_field :email, size: 40 %>
<!-- END_HIGHLIGHT -->
</div>
<div class="field">
<%= f.label :pay_type %><br>
<!-- START_HIGHLIGHT -->
<%= f.select :pay_type, Order::PAYMENT_TYPES,
prompt: 'Select a payment method' %>
<!-- END_HIGHLIGHT -->
</div>
<div class="actions">
<!-- START_HIGHLIGHT -->
<%= f.submit 'Place Order' %>
<!-- END_HIGHLIGHT -->
</div>
<% end %>
/app/models/order.rb：
class Order < ActiveRecord::Base
PAYMENT_TYPES = [ "Check", "Credit card", "Purchase order" ]
has_many :line_items, dependent: :destroy
# ...
validates :name, :address, :email, presence: true
validates :pay_type, inclusion: PAYMENT_TYPES
end
/app/models/line_item.rb：
class LineItem < ActiveRecord::Base
belongs_to :order
belongs_to :product
belongs_to :cart
def total_price
product.price * quantity
end
end