Question

我创建了一个运作良好的电子商务平台，会员可以在这里购买/查看书籍。一切正常，但我想通过Book_Id组织我的索引页面中的所有书籍。

目前，我有3个阵列根据图书可用性和会员购买或未购买的图书显示不同的信息。如何组合这些数组，或者按BOOK_ID组织它们。

实施例

Total Books = 10

5 Available Books {1, 2, 3, 4, 5}

3 Books Purchased {6, 8, 9}

2 Coming Soon Books {7, 10}

Can I somehow organize the arrays by id {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

模型

class User < ActiveRecord::Base
  attr_accessible :name, :email, :password, :member

  has_many :books, through: :orders
  has_many :orders, :dependent => :destroy

  ###Users purchased books
  def purchased_books
    books
  end

  def unavailable_unpurchased_books
    Book.unavailable.where("id not in (?)", purchased_issues.pluck(:issue_id))
  end
end

class Order < ActiveRecord::Base
  attr_accessible :book_id, :order_date, :user_id

  belongs_to :publisher
  belongs_to :user
  belongs_to :book

end

class Book < ActiveRecord::Base
  attr_accessible :publisher_id, :description, :pages, :title, :available_in, :price, :release_date

  has_many :orders
  has_many :users, through: :orders

  scope :unavailable,->{where("release_date > ?",Date.today)}
  scope :available,->{where("release_date < ?",Date.today)

end

CONTROLLER

def index
  @available_books = Book.available.where(:publisher_id => @publisher.id)
  @orders = current_user.orders
  respond_to do |format|
    format.html
    format.json  { render :json => @issues }
  end
end

视图

<% if current_user.member? %>

 ###HOW CAN I ORGANIZE THESE INTO 1 BY BOOK_ID

  ###Shows All Available Books
  <% @available_books.each do |book| %> 
    <%= book.title %>
  <% end %>

  ###Shows Books Bought By Member
  <% @orders.each do |order| %>
    <%= order.book.title %>
  <% end %>

  ###Shows All Books Not Available or Coming Soon
  <% current_user.unavailable_unpurchased_books do |book| %>
    <%= book.title %>
  <% end %>


<% end %>

Answer 1

未经测试，但如何......

...控制器

@available_books = Book.available.where(:publisher_id => @publisher.id)
@ordered_books = current_user.books
@not_available = current_user.unavailable_unpurchased_books
@all_books = @available_books + @ordered_books + @not_available
@all_books.sort!{|x| x.id}

您可能需要一些辅助方法来显示哪些图书在视图中的哪些类别

如何通过id组织三个不同的循环

1 个答案: