Rails Pg_Search 在没有更改代码的情况下停止工作

问题描述

我有一个实现了 pg_search 的图书馆管理应用程序；一切正常，突然间它开始在索引上显示所有项目，但我没有更改有关该功能的任何内容。 我会留下所有相关的代码，请告诉我是否需要更多的东西。 提前致谢。

book.rb

class Book < ApplicationRecord
  belongs_to :user
  has_many :loans
  belongs_to :category

  has_one_attached :photo

  validates :title,presence: true
  validates :author,presence: true

 

  include PgSearch::Model

  pg_search_scope :search_by_full_name,against: [:title,:author],using: {
      tsearch: {
        prefix: true
      }
    }

    def self.to_csv(options = {})
      CSV.generate(options) do |csv|
        csv << column_names
        all.each do |book|
          csv << book.attributes.values_at(*column_names)
        end
      end
    end

    #self.per_page = 12
end

book_controller.rb

class BooksController < ApplicationController
  before_action :authenticate_user!

  def index
    if params[:term].present?
      @books = Book.search_by_full_name(params[:term])
      @books = policy_scope(Book)
    else
      @books = Book.paginate(page: params[:page])
      @books = policy_scope(Book) 
    end
    
  end

  def show
    @book = Book.find(params[:id])
    authorize @book
  end

  def new
    @user = User.find(params[:user_id])
    @book = Book.new
    @categories = Category.all.map{|c| [ c.name,c.id ] }
    authorize @book
  end

  def create
    @user = User.find(params[:user_id])
    @book = Book.new(book_params)
    # @book.category_id = params[:category_id] 
    @book.user = @user
    authorize @book
    if @book.save
      redirect_to user_books_path
      flash[:notice] = 'Success. Your book was added to the Library'
    else
      render "new"
      flash[:notice] = 'Book not created. Please try again'

    end
  end

  def edit
    @user = User.find(params[:user_id])
    @book = Book.find(params[:id])
    @categories = Category.all.map{|c| [ c.name,c.id ] }
    authorize @book
  end

  def update
    @book = Book.find(params[:id])
    @book.category_id = params[:category_id]
    @book.update(book_params)
    authorize @book
    redirect_to user_book_path
  end

  def destroy
    @book = Book.find(params[:id])
    @book.destroy
    authorize @book
    redirect_to user_books_path
  end

  private

  def book_params
    params.require(:book).permit(:title,:author,:photo,:comments,:category_id)
  end
end

_book_search_bar.html.erb

<%= form_tag user_books_path(:user_id),method: :get,class: "search-bar" do %>
  <%= text_field_tag 'term',params[:term],placeholder: "Enter book or author" %>
  <br>
  <br>
  <%= submit_tag "SEARCH BOOK",class: "btn-main" %>
<% end %>

解决方法

您只是重新分配了 @books = policy_scope(Book)，这将同时删除搜索范围和分页。

def index
  if params[:term].present?
    @books = Book.search_by_full_name(params[:term])
  else
    @books = Book.paginate(page: params[:page])
  end
  @books = policy_scope(@books)
end

代替类传递实际作用域给专家或将其颠倒过来：

def index
  @books = policy_scope(Book).then do |scope|
    if params[:term].present?
      scope.search_by_full_name(params[:term])
    else
      scope.paginate(page: params[:page])
    end
  end
end

停止工作，没有更改代码

不太可能。更有可能的是，回归是在实施 Pundit 时引起的，并且没有检测到它的测试。事情不会神奇地发生。