Question

我有一个Ruby-on-Rails应用程序（Ruby 2.3.2）并运行Kaminari gem进行分页。我遇到了一个需要通过子协会进行动态分页的情况。例如：

允许人们在图书馆中查找图书的应用程序。有一个library类，has_many: :books。库控制器有这个：

# LibrariesController
expose_decorated :library
expose_decorated :books

def show
  self.library = Library.find(params[:library_id])
  self.books = library.books.page(params[:books_page])
end

图书馆/ show.html.slim：

/- # library/show.html.slim
a name='library_books_list'
= render layout: 'books/index', locals: { books: books }
  = paginate books, param_name: 'books_page', params: { anchor: 'library_books_list' }

这很好用。但是，我需要更新应用程序，以便所有书籍都按发布者排序。所以，现在我的图书馆模型有这个：

# Library model
has_many :publishers
has_many :books, through: :publishers

我正在格式化库#show页面以列出所有发布者，并在每个发布者阻止列表中列出分页的书籍。我需要每个发布商块独立分页，我知道每个发布商块需要唯一的分页param_name。以下是我的库控制器和显示页面的半伪代码。

# LibrariesController
expose_decorated :library
expose_decorated :publishers
expose_decorated :books # The PublishersController is never called, so this has to be here

def show
  self.library = Library.find(params[:library_id])
  self.publishers = library.publishers # Doesn't have to be paginated
  # Something like this?
  self.publishers.each do |p|
    p.books.page(params[:"books_page_#{p.id}"])
  end

图书馆显示页面：

/- # library/show.html.slim
- publishers.each do |p|
  a name="library_books_list_#{p.id}"
  = render layout: 'books/index', locals: { books: p.books }
    = paginate p.books, param_name: "books_page_#{p.id}", params: { anchor: "library_books_list_#{p.id}" }

永远不会调用发布者控制器，因此我无法在那里进行分页。上面的方法不起作用，因为它没有给出版商的书提供正确的分页变量（未定义的方法`total_pages'）。尝试在视图页面上添加分页也不起作用：

= render layout: 'books/index', locals: { books: p.books.page(params[:"books_page_#{p.id}"]) }
  = paginate p.books, param_name: "books_page_#{p.id}", params: { anchor: "library_books_list_#{p.id}" }

和

= render layout: 'books/index', locals: { books: p.books }
  = paginate p.books.page(params[:"books_page_#{p.id}"]), param_name: "books_page_#{p.id}", params: { anchor: "library_books_list_#{p.id}" }

都以同样的方式失败：undefined method 'page' for #<PaginatingDecorator。应该注意的是，“书籍/索引”也没有给书籍控制者打电话;它只是一个视图页面，打印出传入项目的相关信息。

Kaminari对嵌套儿童进行分页

0 个答案: