Rails Agile Store Basic

Question 1

Mobile Viewport

Answer 1

meta name=”viewport”, content=”width=device-width, initial-scale=1.0” >

Question 2

Product validation

Answer 2

validates :title, :description, :image_url, presence: true
validates :price, numericality: {greater_than_or_equal_to: 1}
validates :title, uniqueness: true
has_attached_file :image, :styles=> {:medium => “300x300>”, :thumb=> “100x100>”}
validates_attachment_content_type :image, :content_type =>[ “image/png” , “image/jpg”, “image/gif” ]

Question 3

D2: Connecting Products to Carts

Cart Scaffold

Answer 3

$ rails generate scaffold cart

$ rails generate scaffold line_item product:references cart:references

Question 4

D3: model Cart.rb

model Cart.rb

Answer 4

has_many :line_items, dependent: :destroy

Question 5

D5: model product.rb

ensure_not_referenced_by_any_line_item

Answer 5

has_many :line_items
before_destroy :ensure_not_referenced_by_any_line_item
private
def ensure_not_referenced_by_any_line_item
if line_items.empty?
return true
else
errors.add(:base , ‘Line items present’)
return false
end
end

Question 6

D6: CurrentCart

application_controller.rb

Answer 6

module CurrentCart
      extend ActiveSupport::Concern
      private
        def set_cart
          @cart = Cart.find(session[:cart_id])
        rescue ActiveRecord::RecordNotFound
          @cart = Cart.create
          session[:cart_id] = @cart.id
        end
    end

Question 7

D7: Adding a Button

in app/view/store/index.html.erb

Answer 7

%= button_to ‘Add to Cart’, line_items_path(:product_id => product) %>

Question 8

D8: adding the method in Line_items_controller.rb

depot_f/app/controllers/line_items_controller.rb

Answer 8

include CurrentCart
before_action :set_cart, only: [:create]

 def create
    product = Product.find(params[:product_id])
    @line_item = @cart.line_items.build(:product => product)

respond_to do |format|
  if @line_item.save
    format.html { redirect_to(@line_item.cart, :notice => 'Line item was successfully created.') }
    format.js { @current_item = @line_item }
    format.json { render :show, status: :created, location: @line_item }
  else
    format.html { render :action => "new" }
    format.json { render json: @line_item.errors, status: :unprocessable_entity }
  end
end   end

Question 9

D9: Putting the view for Adding

in app/view/carts/show.html.erb

Answer 9

% @cart.line_items.each do |item| %>

<li>

Question 10

Task E: A Smarter Cart

Answer 10

$ rails generate migration add_quantity_to_line_item quantity:integer

Question 11

Task E2: Modify the migration to add default value

Answer 11

#class AddQuantityToLineItem  1
  #end
#end

Question 12

Task E3: Add to cart f(x)

in app/model/cart.rb

Answer 12

class Cart :destroy

    def add_product(product_id)
    current_item = line_items.find_by(product_id: product_id)
    if current_item
      current_item.quantity += 1
    else
      current_item = line_items.build(product_id: product_id)
    end
    current_item
  end
end

Question 13

Task E5: update the show.html in Cart

in app/view/carts/show.html.erb

Answer 13

<p></p>

Question 14

Task E6: Create the cart render partial

in app/views/carts/_cart.html.erb

Answer 14

%= render(cart.line_items) %>

    Total

%= button_to (‘Empty cart’), @cart, method: :delete, data: { confirm: ‘Are you sure?’ } %>

Question 15

Task E7: Create new migration

Answer 15

$ rails generate migration combine_items_in_cart

Question 16

Task E8: Method for adding items or subtracting in the custom migration (Combine UP)

Answer 16

class CombineItemsInCart  1
          # remove individual items
          cart.line_items.where(product_id: product_id).delete_all

          # replace with a single item
          item = cart.line_items.build(product_id: product_id)
          item.quantity = quantity
          item.save!
        end
      end
    end
  end

def self.down
# split items with quantity>1 into multiple items
LineItem.where(“quantity>1”).each do |line_item|
# add individual items
line_item.quantity.times do
LineItem.create cart_id: line_item.cart_id, product_id: line_item.product_id, quantity: 1
end
# remove original item
line_item.destroy
end
end

end

Question 17

Task E8: CREATE, UPDATE , DESTROY Carts_controller.rb

Answer 17

def create
    @cart = Cart.new(cart_params)

respond_to do |format|
  if @cart.save
    format.html { redirect_to @cart, notice: 'Cart was successfully created.' }
    format.json { render :show, status: :created, location: @cart }
  else
    format.html { render :new }
    format.json { render json: @cart.errors, status: :unprocessable_entity }
  end
end   end

def update
respond_to do |format|
if @cart.update(cart_params)
format.html { redirect_to @cart, notice: ‘Cart was successfully updated.’ }
format.json { render :show, status: :ok, location: @cart }
else
format.html { render :edit }
format.json { render json: @cart.errors, status: :unprocessable_entity }
end
end
end

  def destroy
    @cart.destroy if @cart.id == session[:cart_id]
    session[:cart_id] = nil
    respond_to do |format|
      format.html { redirect_to store_url }
      format.json { head :no_content }
    end
  end

Question 18

Task F: Add a Dash of Ajax
Task F1.Render the views for Ajax action to add the partials
app/views/application.html.erb

Answer 18

div class=”col-xs-2”>
<div>
</div>

Question 19

Task F2. Create the Cart Partial VIew

in app/views/carts/_cart.html.erb

Answer 19

%= render(cart.line_items) %>
    tr class="total_line">
     td colspan="2">Total
      td class="total_cell">
    /tr>
/table>
%= button_to ('Empty cart'), @cart, method: :delete, data: { confirm: 'Are you sure?' } %>

Question 20

Task F3. Create the Cart Show VIew

app/views/carts/show.html.erb

Answer 20

% if notice %>
p id=”notice”>
% end %>
%= render @cart %>

Question 21

Task F4. Update the Store Controller

app/controllers/store/stores_controller.rb

Answer 21

class StoreController

Question 22

Task F5. Update the Add to cart in the Store Index page by adding Ajax
app/views/store/index.html.erb

Answer 22

%= button_to ‘Add to Cart’, line_items_path(:product_id => product) , :remote => true %>

Question 23

Task F6. Create a Rails JavaScript builder with

app/views/line_items/create.js.erb

Answer 23

$(‘#cart’).html(“”)

Question 24

Task F7. Make it visible

app/controllers/line_items_controller.rb

Answer 24

def create
    @cart = current_cart
    product = Product.find(params[:product_id])
    @line_item = @cart.add_product(product.id)

    respond_to do |format|
      if @line_item.save
        format.html { redirect_to store_url }
        format.js   { @current_item = @line_item }
      else
        format.html { render :new }
      end
    end
  end

Question 25

Task F8. Make it Shine

app/views/line_items/create.js.erb

Answer 25

$(‘#cart2’).html(“”);

$(‘#current_item’).css({‘background-color’:’#88ff88’}).animate({‘background-color’:’#114411’}, 1000);

Question 26

Task F9. Make it visible/ invisible
F9.1
app/views/carts/_cart.html.erb

Answer 26

#first line
 #
..
#
#last line

Question 27

F10 Use the helper to…HELP

app/helpers/application_helper.rb

Answer 27

module ApplicationHelper
def hidden_div_if(condition, attributes = {}, &block)
if condition
attributes[“style”] = “display: none”
end
content_tag(“div”, attributes, &block)
end
end

Question 28

Task F11 Update the destroy method

app/controllers/line_items_controller.rb

Answer 28

def destroy
    @line_item.destroy
    respond_to do |format|
      format.html { redirect_to line_items_url, notice: 'Line item was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

Question 29

Part G: Checkout

G1 creating the scaffold for Order and Migrations for LineItems

Answer 29

$ rails generate scaffold order name:string address:text email:string pay_type:string
$ rails generate migration add_order_id_to_line_item order_id:integer
$ rake db:migrate

Question 30

G2 Adding the checkout button

app/views/carts/_cart.html.erb

Answer 30

# :get %>
#<div class="depot_form">
  #   
    #      
      #    </div>

Question 31

G3 Update the form

app/views/orders/_form.html.erb

Answer 31

…

<div>
<br></br>

</div>

<div>
<br></br>

</div>

<div>
<br></br>

</div>

<div>
<br></br>

</div>

<div>

</div>

Question 32

G4 Update the order LineItem

app/model/line_item.rb

Answer 32

class LineItem

Question 33

G5 Update the order Model

app/model/order.rb

Answer 33

class Order

Question 34

G6 Update the orders controller

app/controllers/orders/orders_controlller.rb

Answer 34

def new
    @cart = current_cart
    if @cart.line_items.empty?
      redirect_to store_url, notice: "Your cart is empty"
      return
    end
    @order = Order.new
  end
#...

def create
    @cart = current_cart
    @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: 'Obrigado pelo envio da ordem' }
        format.json { render :show, status: :created, location: @order }
      else
        format.html { render :new }
        format.json { render json: @order.errors, status: :unprocessable_entity }
      end
    end
  end

Question 35

G7 Update the Create.js.erb

app/views/line_items/create.js.erb

Answer 35

#Add one line
$('#notice').hide();

Question 36

G8 Pagination

Gemfile

Answer 36

gem ‘will_paginate’

Question 37

G9 Pagination

app/controllers/orders/orders_controlller.rb

Answer 37

def index
    @orders = Order.paginate 
        :page => params[:page],
        :order=> 'created_at desc',
        :per_page => 10
   respond_to do |format|
       format.html # index.html.erb
       format.xml { render :xml => @orders }
   end
end

Question 38

G10 Index

app/views/orders/index.html.erb

Answer 38

<p></p>

Question 39

TaskH:SendingMail

Answer 39

Use the Code4Startup

Question 40

TaskI:Users

Answer 40

Use the Code4Startup

Question 41

Iteration X: Accepting Stripe Payments

Answer 41

se the Code4Startup

Question 42

D4: model LineItem.rb

Answer 42

class LineItem