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  • Inspecting the model in a Rails application

    - by Matt Sherman
    I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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  • Inspecting the model in a Rails application

    - by Matt Sherman
    I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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  • Rails backend: debugging [closed]

    - by banditKing
    I have a rails -API app with Rabl. Im trying to build a photo sharing app. Im getting status 500 codes when my client communicates with the server. Im trying to find out how to debug this. The client is an iOS app I wrote. Where should I begin the debugging process and what are the best tools for debugging rails-api backend apps. Im new to server development so trying to learn the tricks of the trade. Any help would be appreciated. Thanks

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  • Voice chat in Rails

    - by Arkid
    I am working on an application which helps group chat amongst users in a chat room. We are using the Juggernaut plugin for the purpose. I wanted to know whether we should use something else as we need to allow voice audio chat in the next iteration..

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  • in rails should i be installing as a gem or a plugin

    - by drake
    I am trying to use acts_as_audited plugin. Should I be installing it as a gem (put it in environment.rb) or a plugin? what is the advantage of one over the other. Later on I plan to put this app on the clients server for permanent hosting. so am I better off having it as a gem? if it is as a gem ...when i put the app on the clients server..will I not have to get this plugin again?

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  • Getting Paperclip to work in Rails

    - by Danny McClelland
    Hi Everyone, I have installed the Paperclip plugin to attempt to upload an avatar for my kase model. For some reason, the select the file button shows, and I can choose a file - but then when I click update the kase - it takes me to the show page, but the missing.png rather than the selected image. kase.rb class Kase < ActiveRecord::Base def self.all_latest find(:all, :order => 'created_at DESC', :limit => 5) end def self.search(search, page) paginate :per_page => 5, :page => page, :conditions => ['name like ?', "%#{search}%"], :order => 'name' end # Paperclip has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" } end kases_controller.rb # GET /kases/new # GET /kases/new.xml def new @kase = Kase.new respond_to do |format| format.html # new.html.erb format.xml { render :xml => @kase } end end new.html.erb <% content_for :header do -%> Cases <% end -% <% form_for(@kase) do |f| %> <%= f.error_messages %> <ul id="kases_new"> <li> <%= f.file_field :avatar %></li> <li>Job Ref.<span><%= f.text_field :jobno %></span></li> <li>Case Subject<span><%= f.text_field :casesubject %></span></li> <li>Transport<span><%= f.text_field :transport %></span></li> <li>Goods<span><%= f.text_field :goods %></span></li> <li>Date Instructed<span><%= f.date_select :dateinstructed %></span></li> <li>Case Status<span><%= f.select "kase_status", ['Active', 'On Hold', 'Archived'] %> </span></li> <li>Client Company Name<span><%= f.text_field :clientcompanyname %></span></li> <li>Client Company Address<span><%= f.text_field :clientcompanyaddress %></span></li> <li>Client Company Fax<span><%= f.text_field :clientcompanyfax %></span></li> <li>Case Handler Name<span><%= f.text_field :casehandlername %></span></li> <li>Case Handler Tel<span><%= f.text_field :casehandlertel %></span></li> <li>Case Handler Email<span><%= f.text_field :casehandleremail %></span></li> <li>Claimant Name<span><%= f.text_field :claimantname %></span></li> <li>Claimant Address<span><%= f.text_field :claimantaddress %></span></li> <li>Claimant Contact<span><%= f.text_field :claimantcontact %></span></li> <li>Claimant Tel<span><%= f.text_field :claimanttel %></span></li> <li>Claimant Mob<span><%= f.text_field :claimantmob %></span></li> <li>Claimant Email<span><%= f.text_field :claimantemail %></span></li> <li>Claimant URL<span><%= f.text_field :claimanturl %></span></li> <li>Comments<span><%= f.text_field :comments %></span></li> </ul> <div class="js_option"> <%= link_to_function "Show financial options.", "Element.show('finance_showhide');" %> </div> <div id="finance_showhide" style="display:none"> <ul id="kases_new_finance"> <li>Invoice Number<span><%= f.text_field :invoicenumber %></span></li> <li>Net Amount<span><%= f.text_field :netamount %></span></li> <li>VAT<span><%= f.text_field :vat %></span></li> <li>Gross Amount<span><%= f.text_field :grossamount %></span></li> <li>Date Closed<span><%= f.date_select :dateclosed %></span></li> <li>Date Paid<span><%= f.date_select :datepaid %></span></li> </ul> <div class="js_option"> <%= link_to_function "I'm confused! Hide financial options.", "Element.hide('finance_showhide');" %> </div> </div> <p> <%= f.submit "Create" %> </p> <% end %> <%= link_to 'Back', kases_path %> I have tried putting the <%= f.file_field :avatar % in it's own form on the same page, but that didn't make a difference. Thanks in advanced! Thanks, Danny

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  • Rails Facebooker image_submit_tag

    - by Miha
    I have a typical form_for for registering user. But in the end I would like to have an option to submit data with fb_login_button. So I could save user's (manually entered) data as well as data that facebook sends me in one swing. Is that possible? If not, can I get user's facebook data wihout redirecting to new page?

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  • tag statistics with rails

    - by poseid
    I am using the plugin: http://github.com/karmi/is_taggable How can I perform simple statistics on my tags, e.g. what's the most used tag? which tags are not used, etc.? With SQL I would do something like: select id, count(*) from taggings group by taggable_id; But I am not seeing how to do this with the plugin. Thanks!

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  • Rails Plugin for Multiple Ratings Per Model?

    - by Kevin
    I'm looking to add the capability of rating a model I have under several different categories like "Knowledgeable" "Organized", etc. Is there a plugin that will allow me to do this, and maybe even have a cool x/5 stars graphical representation as well?

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  • Rails autocomplete plugin.

    - by piemesons
    Hello Is there any plugin available for auto complete like in stackoverflow. Right now i am using acts_as_taggable plugin. I want to check the new created tag, autocomplete with comma separate. How to use auto_complete plugin and acts_as_taggable both. Consider the thing done in stackoverflow tag case.

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  • How should secret files be pushed to an EC2 (on AWS) Ruby on Rails application?

    - by nikc
    How should secret files be pushed to an EC2 Ruby on Rails application using amazon web services with their elastic beanstalk? I add the files to a git repository, and I push to github, but I want to keep my secret files out of the git repository. I'm deploying to aws using: git aws.push The following files are in the .gitignore: /config/database.yml /config/initializers/omniauth.rb /config/initializers/secret_token.rb Following this link I attempted to add an S3 file to my deployment: http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/customize-containers.html Quoting from that link: Example Snippet The following example downloads a zip file from an Amazon S3 bucket and unpacks it into /etc/myapp: sources: /etc/myapp: http://s3.amazonaws.com/mybucket/myobject Following those directions I uploaded a file to an S3 bucket and added the following to a private.config file in the .elasticbeanstalk .ebextensions directory: sources: /var/app/current/: https://s3.amazonaws.com/mybucket/config.tar.gz That config.tar.gz file will extract to: /config/database.yml /config/initializers/omniauth.rb /config/initializers/secret_token.rb However, when the application is deployed the config.tar.gz file on the S3 host is never copied or extracted. I still receive errors that the database.yml couldn't be located and the EC2 log has no record of the config file, here is the error message: Error message: No such file or directory - /var/app/current/config/database.yml Exception class: Errno::ENOENT Application root: /var/app/current

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  • Build & Install Ruby Gems with Rake

    - by kerry
    Are you using rake to build your gems?  Have you ever wished there were an install task to install it to your machine?  I, for one, have written something like this a few times: 1: desc 'Install the gem' 2: task :install do 3: exec 'gem install pkg/goodies-0.1.gem' 4: end 5:  That is pretty straightforward.  However, this will not work under JRuby on Mac where the command should be ‘jgem’.  So we can enhance it to detect the platform, and host OS: 1: desc 'Install the gem' 2: task :install do 3: executable = RUBY_PLATFORM[/java/] && Config::CONFIG[/darwin/] ? 'jgem' : 'gem' 4: exec "#{executable} install pkg/goodies-0.1.gem" 5: end This is a little better.  I am still not comfortable with the sloppiness of building a shell command and executing it though.  It is possible to do it with strictly Ruby.  I am also going namespace it to integrate better with the GemPackageTask.  Now it will be accessed via ‘rake gem:install’ 1: desc 'Install the gem' 2: namespace 'gem' do 3: task :install do 4: Gem::Installer.new('pkg/goodies-0.1.gem').install 5: end 6: end   I have included this in the goodies gem 0.2, so go ahead and install it!  ‘gem install goodies’

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  • How does this ruby error handling module code work

    - by Michael Durrant
    Trying to get a better handle on ruby exception handling. I have this code (from a book): def err_with_msg(pattern) m = Module.new (class << m; self; end).instance_eval do define_method(:===) do |e| pattern === e.msg end end m end So ok this is a method. We're creating a new Module. I think of module as mix-ins. Not sure what it's doing here. Not we add the module to the class. Fair enough. Then we have self on its own. What that for? I guess we have a little anonymouse method this is just about self. hmmm ok, now for each of the above, check the pattern match. but for each, I thought the above for for a new Module, did the module get to use instance's by being included? A better explanation of what's going on here would be most helpful.

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  • Writing a DB Python or Ruby

    - by WojonsTech
    I am planning on writing a database. I know it's crazy and people will tell me there is no good reason to do so. I am really using it to get better at programming overall, this database wont be used in production. I am planning on writing it Ruby or Python. I have some experience with both languages, but no job or large project experience. I don't want this to be a this is better than that randomly I really need some facts. The things that I need to know are which of the language are better at the following things. Searching arrays/hashes? Sorting? Threading? Sockets? Memory management? Disk Reads/Writes? base64 encode/decode? Again this is just a project for myself. I will port it on github for the hell of it, but I don't expect it to be amazing or going up against mysql or mongodb any day.

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  • Team Software Development using Ruby on Rails

    - by Panoy
    I used to work alone on small to medium sized programming projects before and have no experience working in a team environment. Currently, there will be 3 of us in an in-house software development team that is tasked to develop a number of software for an academic institution. We have decided to use the web for the majority of the projects and are planning to choose Ruby on Rails for this and I would like to ask for your inputs, advices and approaches with regards to software development as a team using the RoR web framework. One thing that has really confounded me is how you divide the programming tasks of a project if there are 3 of you that are really doing the coding. It’s obvious that we as developers approach a problem in a modular way and finish it one after another. If the project consists of 3 modules, should each one of us focus on each of those modules? Would it be faster that way? How about if the 3 of us would focus on one module first (that’s what I really prefer). Is using a distributed version control system such as Git the answer to this type of problem? Please don’t forget to put your tips and experiences with regards to team software development. Cheers!

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  • Very basic beginner Ruby question to do with elsif and ranges [migrated]

    - by MattKneale
    I've been trying to get to grasps with Ruby (for all of an hour) and this is my first language. I've got the following code: var_comparison = 5 print "Please enter a number: " my_num = Integer(gets.chomp) if my_num > var_comparison print "You picked a number greater than 5!" elsif my_num < var_comparison print "You picked a number less than 5!" elsif my_num > 99 print "Your number is too large, man." else print "You picked the number 5!" end Clearly the interpreter has no way of distinguishing between accepting the rule 5 or 99. How do I make it so that any number between 6-99 returns "You picked a number greater than 5!", but a number 100 or greater returns "Your number is too large, man!"? Do I need to specifically state a range somehow? How would I best do that? Would it by the normal range methods e.g. if my_num 6..99 or if my_num.between(6..99) ?

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  • Passenger, Nginx, and Capistrano - Passenger not launching Rails app at all

    - by Throlkim
    Essentially, my route is working perfectly, Passenger seems to be loading - all is hunky-dory. Except that nothing Railsy happens. Here's my Nginx log from starting the server to the first request (ignore the different domain/route - it's because I haven't moved the new domain over yet, and it's returning a 403 error because there's no index file in the public folder): [ pid=24559 file=ext/nginx/HelperServer.cpp:826 time=2009-11-10 00:49:13.227 ]: Passenger helper server started on PID 24559 [ pid=24559 file=ext/nginx/HelperServer.cpp:831 time=2009-11-10 00:49:13.227 ]: Password received. 2009/11/10 00:49:53 [error] 24578#0: *1 directory index of "/var/www/***/current/public/" is forbidden, client: 188.221.195.27, server: ***, request: "GET / HTTP/1.1", host: "***" 2009/11/10 00:49:54 [error] 24578#0: *1 open() "/var/www/***/current/public/favicon.ico" failed (2: No such file or directory), client: 188.221.195.27, server: ***, request: "GET /favicon.ico HTTP/1.1", host: "***", referrer: "***" Someone on the RubyOnRails IRC channel suggested that it might be a webserver permissions problem. I had a suspicion that it might be a filesystem permission problem, but then Nginx runs as www-data and Passenger as root. I can load static files from within the public directory fine, but no Rails application is being launched. Does anyone have an idea? My head is gradually melting away figuring this one out! Edit: Here's the vhost file: server { listen 80; server_name ***; passenger_enabled on; location / { root /var/www/***/current/public; index index.html index.htm; } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } }

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  • Heroku Rails Internal Server Error

    - by Ryan Max
    Hello. I got a 500 Internal Sever error when I try to deploy my rails app on heroku. It works fine on my local machine, so i'm not sure what's wrong here. Seems to be something with the "sessions" on the home controller. Here is my log: ==> production.log <== # Logfile created on Sun May 09 17:35:59 -0700 2010 Processing HomeController#index (for 76.169.212.8 at 2010-05-09 17:36:00) [GET] ActiveRecord::StatementInvalid (PGError: ERROR: relation "sessions" does not ex ist : SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a .attnotnull FROM pg_attribute a LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum WHERE a.attrelid = '"sessions"'::regclass AND a.attnum > 0 AND NOT a.attisdropped ORDER BY a.attnum ): lib/authenticated_system.rb:106:in `login_from_session' lib/authenticated_system.rb:12:in `current_user' lib/authenticated_system.rb:6:in `logged_in?' lib/authenticated_system.rb:35:in `authorized?' lib/authenticated_system.rb:53:in `login_required' /home/heroku_rack/lib/static_assets.rb:9:in `call' /home/heroku_rack/lib/last_access.rb:25:in `call' /home/heroku_rack/lib/date_header.rb:14:in `call' thin (1.2.7) lib/thin/connection.rb:76:in `pre_process' thin (1.2.7) lib/thin/connection.rb:74:in `catch' thin (1.2.7) lib/thin/connection.rb:74:in `pre_process' thin (1.2.7) lib/thin/connection.rb:57:in `process' thin (1.2.7) lib/thin/connection.rb:42:in `receive_data' eventmachine (0.12.10) lib/eventmachine.rb:256:in `run_machine' eventmachine (0.12.10) lib/eventmachine.rb:256:in `run' thin (1.2.7) lib/thin/backends/base.rb:57:in `start' thin (1.2.7) lib/thin/server.rb:156:in `start' thin (1.2.7) lib/thin/controllers/controller.rb:80:in `start' thin (1.2.7) lib/thin/runner.rb:177:in `send' thin (1.2.7) lib/thin/runner.rb:177:in `run_command' thin (1.2.7) lib/thin/runner.rb:143:in `run!' thin (1.2.7) bin/thin:6 /usr/local/bin/thin:20:in `load' /usr/local/bin/thin:20 Rendering /disk1/home/slugs/155328_f2d3c00_845e/mnt/public/500.html (500 Interna l Server Error) And here is my home_controller.rb class HomeController < ApplicationController before_filter :login_required def index @user = current_user @user.profile ||= Profile.new @profile = @user.profile end end Does it have something the way my routes are set up? Or is it my authentication? (I am using restful authentication with Bort)

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  • Paperclip wont save image in rails app

    - by Micke
    Hello stackoverflow. I am trying to use Paperclip with my rails app to add an avatar to a user but it wont save my image when creating the user. This is what the model looks like: class User < ActiveRecord::Base has_attached_file :avatar And the registerform in haml: - form_for :user, @user, :url => { :action => "signup" }, :html => { :multipart => true } do |f| ... ... %li %div{:class => "header"} Profilepicture %div{:class => "input"} = f.file_field :avatar And when i look in the log this is what is being passet to the "signup" action: Parameters: {"commit"=>"Save", "action"=>"signup", "controller"=>"user/register", "user"=>{"name"=>"Micke Lisinge", "birthmonth"=>"07", "password_confirmation"=>"[FILTERED]", "nickname"=>"lisinge", "avatar"=>#<File:/tmp/RackMultipart20100426-3076-1x04oxy-0>, "gen"=>"m", "birthday"=>"23", "password"=>"[FILTERED]", "birthyear"=>"1992", "email"=>"[email protected]"}} [paperclip] Saving attachments. Paperclip says it is saving the template but when i look in the public folder in my app it has created a system but the system folder is empty. So it seems like it isnt saving the picture to the folder. It gets handled by the form and saved in my /tmp folder. Maybe you guys have any tips or know what this problem might be? Thanks in advance, Micke.

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  • rails search nested set (categories and sub categories)

    - by bob
    Hello, I am using the http://github.com/collectiveidea/awesome_nested_set awesome nested set plugin and currently, if I choose a sub category as my category_id for an item, I can not search by its parent. Category.parent Category.Child I choose Category.child as the category that my item is in. So now my item has category_id of 4 stored in it. If I go to a page in my rails application, lets say teh Category page and I am on the Category.parent's page, I want to show products that have category_id's of all the descendants as well. So ideally i want to have a find method that can take into account the descendants. You can get the descendants of a root by calling root.descendants (a built in plugin method). How would I go about making it so I can query a find that gets the descendants of a root instead of what its doing now which is binging up nothing unless the product had a specific category_id of the Category.parent. I hope I am being clear here. I either need to figure out a way to create a find method or named_scope that can query and return an array of objects that have id's corresponding tot he descendants of a root OR if I have any other options, what are they? I thought about creating a field in my products table like parent_id which can keep track of the parent so i can then create two named scopes one finding the parent stuff and one finding the child stuff and chaining them. I know I can create a named scope for each child and chain them together for multiple children but this seems a very tedious process and also, if you add more children, you would need to specify more named scopes.

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  • Devise not allowing active resource to access the services

    - by Saurabh Pandit
    In my application there are two folders one for a rails application and another for a ruby application. In the ruby folder I have created a ruby file in which I have written code to access some model which is present in the rails application using active resource. Sample code is shown below : active_resource_example.rb require 'rubygems' require 'active_resource' class Website < ActiveResource::Base self.site = "http://localhost:3000/admin/" self.user = "user" self.password = "password" end websites = Website.find(:all) puts websites.inspect In my rails application I have used ActiveAdmin gem which uses devise for authentication. On rails Server I get the following result : Started GET "/admin/websites.json" for 192.168.1.37 at 2011-11-12 14:41:06 +0530 Processing by Admin::WebsitesController#index as JSON Completed in 43ms And on my terminal where I executed active_resource_example.rb, I got following error : user@user:~/Desktop$ ruby active_resource_example.rb /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:132:in `handle_response': Failed. Response code = 401. Response message = Unauthorized . (ActiveResource::UnauthorizedAccess) from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:115:in `request' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:80:in `block in get' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:218:in `with_auth' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:80:in `get' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/base.rb:894:in `find_every' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/base.rb:806:in `find' from active_resource_example.rb:12:in `<main>' user@user:~/Desktop$ I tried this with another application in which Devise authentication is not used with the same configuration I used in active_resource_example.rb, there I got the result. Desperately need some solution to this issue.

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  • Rails, if instance is in a scope?

    - by Joseph Silvashy
    I using rails 3 and I can't seem to check if a given instance is in a scope, see here: p = Post.find 6 +----+----------+-------------------------+-------------------------+-------------------------+-----------+ | id | title | publish_date | created_at | updated_at | published | +----+----------+-------------------------+-------------------------+-------------------------+-----------+ | 6 | asfdfdsa | 2010-03-28 22:33:00 UTC | 2010-03-28 22:33:46 UTC | 2010-03-28 22:33:46 UTC | true | +----+----------+-------------------------+-------------------------+-------------------------+-----------+ I have a menu scope which looks like: scope :menu, where("published != ?", false).limit(4) When I run it I get: Post.menu.all +----+------------------+------------------+------------------+-------------------+-----------+ | id | title | publish_date | created_at | updated_at | published | +----+------------------+------------------+------------------+-------------------+-----------+ | 1 | Lorem ipsum | 2010-03-23 07... | 2010-03-23 07... | 2010-03-28 21:... | true | | 2 | fdasf | 2010-03-28 21... | 2010-03-28 21... | 2010-03-28 21:... | true | | 3 | Ruby’s Imple... | 2010-03-28 21... | 2010-03-28 21... | 2010-03-28 21:... | true | | 4 | dsaD | 2010-03-28 22... | 2010-03-28 22... | 2010-03-28 22:... | true | +----+------------------+------------------+------------------+-------------------+-----------+ Which is correct, but if I try to check if p is in the the menu scope using: Post.menu.exists?(p) I get true when it should be false What is the proper way to find out if a given instance of something is in a scope?

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  • Rails form protection questions, hidden field

    - by user284194
    I have a live rails website and I want to have a form with a lot of fields on it. I have set up validations and allowed formatting for every field. I've tested it quite a bit and it seems to catch anything I throw at it. I think it's almost ready to go live, but I want to quadruple check if there's anything else I should do to protect it. My site has a low volume of visitors, but I want it to be a safe as possible. I'd like to avoid using a captcha if I can. I've read that you can use a hidden field to protect forms against bots. Do people recommend this instead of using a captcha, or even using it with a captcha? my form is really standard: <% form_for(@entry) do |f| %> ... <%= f.submit 'Create' %> <% end %> Any suggestions or code samples would be greatly appreciated.

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  • How will Arel affect rails' includes() 's capabilities.

    - by Tim Snowhite
    I've looked over the Arel sources, and some of the activerecord sources for Rails 3.0, but I can't seem to glean a good answer for myself as to whether Arel will be changing our ability to use includes(), when constructing queries, for the better. There are instances when one might want to modify the conditions on an activerecord :include query in 2.3.5 and before, for the association records which would be returned. But as far as I know, this is not programmatically tenable for all :include queries: (I know some AR-find-includes make t#{n}.c#{m} renames for all the attributes, and one could conceivably add conditions to these queries to limit the joined sets' results; but others do n_joins + 1 number of queries over the id sets iteratively, and I'm not sure how one might hack AR to edit these iterated queries.) Will Arel allow us to construct ActiveRecord queries which specify the resulting associated model objects when using includes()? Ex: User :has_many posts( has_many :comments) User.all(:include => :posts) #say I wanted the post objects to have their #comment counts loaded without adding a comment_count column to `posts`. #At the post level, one could do so by: posts_with_counts = Post.all(:select => 'posts.*, count(comments.id) as comment_count', :joins => 'left outer join comments on comments.post_id = posts.id', :group_by => 'posts.id') #i believe #But it seems impossible to do so while linking these post objects to each #user as well, without running User.all() and then zippering the objects into #some other collection (ugly) #OR running posts.group_by(&:user) (even uglier, with the n user queries)

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  • A really smart rails helper needed

    - by Stefan Liebenberg
    In my rails application I have a helper function: def render_page( permalink ) page = Page.find_by_permalink( permalink ) content_tag( :h3, page.title ) + inline_render( page.body ) end If I called the page "home" with: <%= render_page :home %> and "home" page's body was: <h1>Home<h1/> bla bla <%= render_page :about %> <%= render_page :contact %> I would get "home" page, with "about" and "contact", it's nice and simple... right up to where someone goes and changes the "home" page's content to: <h1>Home<h1/> bla bla <%= render_page :home %> <%= render_page :about %> <%= render_page :contact %> which will result in a infinite loop ( a segment fault on webrick )... How would I change the helper function to something that won't fall into this trap? My first attempt was along the lines of: @@list = [] def render_page( permalink ) unless @@list.include?(permalink) @@list += [ permalink ] page = Page.find_by_permalink result = content_tag( :h3, page.title ) + inline_render( page.body ) @@list -= [ permalink ] return result else content_tag :b, "this page is already being rendered" end end which worked on my development environment, but bombed out in production... any suggestions? Thank You Stefan

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