Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Prevent users from editing other users articles

Posted on 2010-08-12
2
Medium Priority
?
555 Views
Last Modified: 2013-11-13
so i have restful_authentication, currently any logged in user can edit any users article by entering the correct url eg. /articles/18/edit, how do i allow only the user who created the article to edit and update it.
#articles_controller.rb
class ArticlesController < ApplicationController
	before_filter :login_required, :only =>[:new, :edit, :destroy, :create, :update]
	before_filter :tag_cloud
  

  def search
  	@search = params[:search]
  	if @search.blank?
  		redirect_to articles_url
  		else
  	@articles = Article.search params[:search], :page => params[:page], :per_page => 10
  	respond_to do |format|
  		format.html 
      format.xml  { render :xml => @articles }
  			end
  		end				
  end
  

  def index
    @page_title = "NDT Articles"
    @articles = Article.paginate :per_page => 20, :page => params[:page],
    				 :order => "created_at DESC"	 
       respond_to do |format|
      format.html
      format.rss 
    end
  end

  def show
    @page_title = "NDT Articles"
  	if params[:permalink]
    @article = Article.find_by_permalink(params[:permalink])
    raise ActiveRecord::RecordNotFound, "Page not found." if @article.nil?
    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @article }
    end
  else
    @article = Article.find(params[:id])
        respond_to do |format|
        format.html # show.html.erb
        format.xml { render :xml => @article }
        
      end
    end
  end 

  def new
    @article = Article.new
    1.upto(3) {@article.assets.build}
    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @article }
    end
  end

  def edit
    @article = Article.find(params[:id])
    if @article.assets.first.nil?
        1.upto(3) {@article.assets.build }
    end
  end  
    
    def tag_cloud 
  	    @tags = Article.tag_counts # returns all the tags used 
  	end
  
  def create
	@article = current_user.articles.build params[:article]
    respond_to do |format|
      if @article.save
        flash[:notice] = 'Article was successfully created.'
        format.html { redirect_to(@article) }
        format.xml  { render :xml => @article, :status => :created, :location => @article }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @article.errors, :status => :unprocessable_entity }
      end
    end
  end

  def update
   params[:asset_ids] ||= []
    @article = Article.find(params[:id])
    unless params[:asset_ids].empty?
    Asset.destroy_pics(params[:id], params[:asset_ids])
  end

    respond_to do |format|
      if @article.update_attributes(params[:article])
        flash[:notice] = 'Article was successfully updated.'
        format.html { redirect_to(@article) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @article.errors, :status => :unprocessable_entity }
      end
    end
  end

  
  def destroy
    @article = Article.find(params[:id])
    @article.destroy

    respond_to do |format|
      format.html { redirect_to(articles_url) }
      format.xml  { head :ok }
    end
  end
end

Open in new window

0
Comment
Question by:depassion
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 12

Accepted Solution

by:
cminear earned 2000 total points
ID: 33431135
First, Article needs to be associated with User, in order to represent which user is the owner of the article.  (You don't include the code from 'article.rb', so I don't know if you've done this already or not.)

If that's in place, simply add a check of the session's user_id value and compare it with the Article's owner.  See the examples below.  I've just added a redirection to the 'index' action; add the appropriate flash message.  And note that I added the check to both 'edit' and 'update'; you don't want anyone trying to skirt around the 'edit' page and directly updating an article, do you?

I don't see the page which presents the 'edit' links, but you could also add code to those templates to hide the 'edit' link to articles for which they are not the owner.

def edit
    @article = Article.find(params[:id])
    if session[:user_id] == @article.user_id
      if @article.assets.first.nil?
        1.upto(3) {@article.assets.build }
      end
    else
      redirect_to :action => 'index'
    end
  end  
    
...

  def update
   params[:asset_ids] ||= []
    @article = Article.find(params[:id])
    unless session[:user_id] == @article.user_id
      redirect_to :action => 'index'
      return
    end
    unless params[:asset_ids].empty?
    Asset.destroy_pics(params[:id], params[:asset_ids])
  end

    respond_to do |format|
      if @article.update_attributes(params[:article])
        flash[:notice] = 'Article was successfully updated.'
        format.html { redirect_to(@article) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @article.errors, :status => :unprocessable_entity }
      end
    end
  end

Open in new window

0
 

Author Comment

by:depassion
ID: 33435132
thanks, that works, i also added
 || current_user.has_role?('administrator')

to allow the admins ro still edit any article.


def edit
    @article = Article.find(params[:id])
    if session[:user_id] == @article.user_id || current_user.has_role?('administrator')
      if @article.assets.first.nil?
        1.upto(3) {@article.assets.build }
      end
    else
      redirect_to :action => 'index'
      flash[:error] = 'Your not authorized'
    end
  end  

def update
   params[:asset_ids] ||= []
    @article = Article.find(params[:id])
    unless session[:user_id] == @article.user_id || current_user.has_role?('administrator')
      redirect_to :action => 'index'
      flash[:error] = 'Your not authorized'
    end  
    unless params[:asset_ids].empty?
    Asset.destroy_pics(params[:id], params[:asset_ids])
  end

Open in new window

0

Featured Post

Important Lessons on Recovering from Petya

In their most recent webinar, Skyport Systems explores ways to isolate and protect critical databases to keep the core of your company safe from harm.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I recently rediscovered rails when I needed a holiday project and decided to build a management dashboard for the company where I work.  With it being a project done in my free time, I could focus my time on learning the basics rather than trying to…
Recently I spent hours debugging an issue in a Rails project where ActiveRecord was causing MySQL errors trying to create a User object of a class at the top level of a Single Table Inheritance model structure.  It turns out `.create` behaves differ…
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
Suggested Courses

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question