Rails 将查看链接重定向到用户想要在登录前查看的页面 [英] Rails to redirect View link to page user wanted to view prior to login
问题描述
我是 Rails 的新手，我有一个这样的 HTML.erb
I am new to rails I have an HTML.erb like this
<h1>books List</h1>
<table id="book" border="3" layout= "fixed" width=" 100%" >
<tr>
<th>Name</th>
<th></th>
<th></th>
<th></th>
</tr>
<% @books.each do |book| %>
<tr >
<td><%= book.name %></td>
<td><%= link_to 'VIEW', book %></td>
</tr>
<% end %>
</table>
在这里，我想重定向到用户登录后想要查看的实际书籍页面，如果用户未登录，则当用户单击查看按钮时，登录弹出窗口将出现.那么我该怎么做.对于我在 Applications_controller 中编写的菜单屏幕的正常登录
Here I wanted to redirect to the actual books page the user wanted to view after user login where the login popup will come when user clicks the view button if user is not logged in. So how can I do it. For my Normal login from the menu screen I have written in applications_controller has
这是我的应用程序控制器
This is my application controller
def after_sign_in_path_for(resources)
if current_user.profile.blank?
new_profile_path
else
session[:previous_url] || books_path
end
end
所以当用户点击查看按钮时，它应该重定向到他登录后想要查看的实际页面.任何人都可以告诉我如何做到这一点.我正在使用设备进行身份验证
So when user clicks on view button it should redirect to actual page he wanted to view after login. Can any tell me how to do this. I am using devise for authentication
这是我的书控制器
class BooksController < ApplicationController
before_action :authenticate_user! , :only => [:show],
#:except => [:index]
def index
@books = BOOK.all.order('rank DESC NULLS LAST')
end
def show
@book = BOOK.find(params[:id])
#@article.user_id = current_user.id
book_rating = BooksRating.where( :book_id =>@book.id,
:user_id => current_user.id )
@avg_r1 = book_rating.collect(&:r1)
@avg_r2 = book_rating.collect(&:r2)
@avg_r3 = book_rating.collect(&:r3)
arr= @avg_r1+@avg_r2+ @avg_r3
@current_user_satisfaction = arr.flatten.compact.sum / arr.flatten.compact.size if arr.flatten.compact.present?
end
def new
@book = BOOK.new
end
def create
@book= Book.new(comp_params)
if @book.save
flash[:success] = "Welcome to my app"
redirect_to root_url
else
render 'new'
end
end
private
def book_params
params.require(:book).permit(:name, :place, :Description,:logo)
end
end
show.html.erb
show.html.erb
<p id="notice"><%= notice %></p>
<p>
<h1> <b>Title:</b>
<%= @book.name %>
</p></h1>
<p>
<b>Logo:</b><br>
<%=image_tag @book.logo.url(:thumb)%>
</p>
<p>
<h2> <b>Author:</b></h2>
<h2> <%= @book.author %></h2>
</p>
<body>
<b>Description:</b>
<h3> <%= @book.Description %></h3>
<h3>Current User Satisfaction:- <%= @current_user_satisfaction %> <br/></h3>
<h2><b>Rating:</b></h2>
<table id="book" border="3" layout= "fixed" width=" 100%" >
<colgroup>
<col style="width: 33%" />
<col style="width: 33%" />
<col style="width: 33%" />
<tr>
<th>Quality:- </th>
<th>satisfaction:-</th>
<th>does it cover all:- </th>
</tr>
<tr >
<td><%= @avg_r1.shift %></td>
<td><%= @avg_r2 .shift %></td>
<td><%= @avg_r3.shift %></td>
</tr>
</colgroup>
</table>
<br /><br />
|
<%= link_to 'Back', books_path %>
</body>
错误
Started GET "/books_ratings/user_rating?book_id=1" for 127.0.0.1 at 2014-01-19 17:33:27 +0100
Processing by BooksRatingsController#user_rating as */*
Parameters: {"book_id"=>"1"}
Completed 500 Internal Server Error in 1ms
NoMethodError (undefined method `profile' for nil:NilClass):
app/controllers/book_ratings_controller.rb:72:in `user_rating'
我的 booksratings_controller 第 72 行
My booksratings_controller line 72
def user_rating
if current_user
book_id = current_user.profile.books.map(&:id)
#rating = current_user.book_ratings.find(:all,:conditions=>["user_id = ? and book_id IN (?)",current_user.id,book_id])
rating = current_user.book_ratings.where("user_id = ? and book_id IN (?)",current_user.id,book_id)
if rating.size !=book_id.size
if session[:book_id].blank?
session[:book_id] = params[:book_id]
render :json=>"redirect".to_json
else
book_id = book_id - rating.map(&:book_id)
@book_rating = current_user.book_ratings.new(:book_id=>book_id.first)
@book = Book.find(book_id.first)
session[:book_id] = params[:book_id]
render :layout =>false
end
else
session[:book_id] = nil
render :json => "redirect".to_json
# redirect_to book_path(params[:book_id])
end
推荐答案
我通过在应用程序控制器中添加路径来解决问题
I have solved by problem by adding the path in the applications controller as
def after_sign_in_path_for(resources)
if current_user.profile.blank?
new_profile_path
else
#session[:previous_url] || books_path
book_path({:id=>params[:book_id]})
end
end
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