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• Having difficulties in ending Michael Hartl's tutorial. Help?

  - by konzepz

  Following Michael Hartl's (amazing) Ruby on Rails Tutorial, on the final section, I get the following errors: 1) User micropost associations status feed should include the microposts of followed users Failure/Error: @user.feed.should include(mp3) expected [#<Micropost id: 2, content: "Foo bar", user_id: 1, created_at: "2011-01-12 21:22:41", updated_at: "2011-01-12 22:22:41">, #<Micropost id: 1, content: "Foo bar", user_id: 1, created_at: "2011-01-11 22:22:41", updated_at: "2011-01-12 22:22:41">] to include #<Micropost id: 3, content: "Foo bar", user_id: 2, created_at: "2011-01-12 22:22:41", updated_at: "2011-01-12 22:22:41"> Diff: @@ -1,2 +1,2 @@ -#<Micropost id: 3, content: "Foo bar", user_id: 2, created_at: "2011-01-12 22:22:41", updated_at: "2011-01-12 22:22:41"> +[#<Micropost id: 2, content: "Foo bar", user_id: 1, created_at: "2011-01-12 21:22:41", updated_at: "2011-01-12 22:22:41">, #<Micropost id: 1, content: "Foo bar", user_id: 1, created_at: "2011-01-11 22:22:41", updated_at: "2011-01-12 22:22:41">] # ./spec/models/user_spec.rb:214 2) Micropost from_users_followed_by should include the followed user's microposts Failure/Error: Micropost.from_users_followed_by(@user).should include(@other_post) expected [#<Micropost id: 1, content: "foo", user_id: 1, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46">] to include #<Micropost id: 2, content: "bar", user_id: 2, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46"> Diff: @@ -1,2 +1,2 @@ -#<Micropost id: 2, content: "bar", user_id: 2, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46"> +[#<Micropost id: 1, content: "foo", user_id: 1, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46">] # ./spec/models/micropost_spec.rb:75 Finished in 9.18 seconds 153 examples, 2 failures Seems like mp3 is not included in the feed. Any ideas on how to fix it? Or where to look for possible errors in the code? I compared the files with Hartl's original code; seems exact. Thanks.

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• Should I expect Comet to be this slow?

  - by Chad Johnson

  I have the following in a Rails controller: def poll records = [] start_time = Time.now.to_i while records.length == 0 do records = Something.uncached{Something.find(:all, :conditions => { :some_condition => false})} if records.length > 0 break end sleep 1 if Time.now.to_i - start_time >= 20 break end end responseData = [] records.each do |record| responseData << { 'something' => record.some_value } # Flag message as received. record.some_condition = true record.save end render :text => responseData.to_json end and then I have Javascript performing an AJAX request. The request sits there for 20 seconds or until the controller method finds a record in the database, waiting. That works. function poll() { $.ajax({ url: '/my_controller/poll', type: 'GET', dataType: 'json', cache: false, data: 'time=' + new Date().getTime(), success: function(response) { // show response here }, complete: function() { poll(); }, error: function() { alert('error'); poll(); } }); } When I have 5 - 10 tabs open in my browser, my web application becomes super slow. Is this to be expected? Or is there some obvious improvement(s) I can make?

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• Running migration on server when deploying with capistrano

  - by Pandafox

  Hi, I'm trying to deploy my rails application with capistrano, but I'm having some trouble running my migrations. In my development environment I just use sqlite as my database, but on my production server I use MySQL. The problem is that I want the migrations to run from my server and not my local machine, as I am not able to connect to my database from a remote location. My server setup: A debian box running ngnix, passenger, mysql and a git repository. What is the easiest way to do this? update: Here's my deploy script: set :application, "example.com" set :domain, "example.com" set :scm, :git set :repository, "[email protected]:project.git" set :use_sudo, false set :deploy_to, "/var/www/example.com" role :web, domain role :app, domain role :db, "localhost", :primary = true after "deploy", "deploy:migrate" When I run cap deploy, everything is working fine until it tries to run the migration. Here's the error I'm getting: ** [deploy:update_code] exception while rolling back: Capistrano::ConnectionError, connection failed for: localhost (Errno::ECONNREFUSED: Connection refused - connect(2)) connection failed for: localhost (Errno::ECONNREFUSED: Connection refused - connect(2))) This is why I need to run the migration from the server and not from my local machine. Any ideas?

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• How to restrict text search to a certain subset of the database ?

  - by Nikhil Garg

  I have a large central database of around 1 million heavy records. In my app, for every user I would have a subset of rows from central table, which would be very small (probably 100 records each).When a particular user has logged in , I would want to search on this data set only. Example: Say I have a central database of all cars in the world. I have a user profile for General Motors(GM) , Ferrari etc. When GM is logged in I just want to search(a full text search and not fire a sql query) for those cars which are manufactured by GM. Also GM may launch/withdraw a model in which case central db would be updated & so would be rowset associated with GM. In case of acquisitions, db of certain profiles may change without launch/removal of new car. So central db wont change then , but rowsets may. Whats the best way to implement such a design ? These smaller row sets would need to be dynamic depending on user activities. We are on Rails 2.3.5 and use thinking_sphinx as the connector and Sphinx/MySQL for search and relational associations.

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• Help me understand dynamic layouts in Sinatra

  - by thermans

  Help me understand this; I'm learning Sinatra (and Rails for that matter, er, and Ruby). Say I'm doing a search app. The search form is laid out in one div, and the results will be laid out in another. The search form is rendered into the div by a previous view (maybe from a login form). I want to process the form params, perform the search, and render the results into the results div. If I have a single "yield" in the layout and render the divs from different views, the results div erases the search div when it renders. If I define the divs in the default layout, then just render the content, obviously the layout will be messed up: there would have to be two "yields" and I don't think Sinatra supports passing blocks in to yields. I tried foca's sinatra-content-for plugin, and that seems closer to what I need. But I can't figure out where to place the "yield_content" statements. If I have this haml in my layout: #search -# search form = yield_content :search #results -# search results = yield_content :results ... this in my search view: - content_for :search do %form{:method => "post"... etc. ... and this in the results view: - content_for :results do %table{:class => 'results'... etc. This sort of works but when I render the results view, the search div is emptied out. I would like to have it remain. Am I doing something wrong? How should I set this up?

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• haml - if-else with different identations

  - by egarcia

  Hi everyone, I'm trying to render a calendar with rails and haml. The dates used come from a variable called @dates. It is a Date range that contains the first and last days to be presented on the calendar. The first day is always sunday and the last one is always monday. I'm planning to render a typical calendar, with one column per weekday (sunday is going to be the first day of the week) using an html table. So, I need to put a %tr followed by a %td on sundays, but the rest of the days I just need a %td. I'm having trouble modelling that on haml. This seems to require different levels of identation, and that's something it doesn't like. Here's my failed attempt: %table %tr %th= t('date.day_names')[0] # Sunday %th= t('date.day_names')[1] %th= t('date.day_names')[2] %th= t('date.day_names')[3] %th= t('date.day_names')[4] %th= t('date.day_names')[5] %th= t('date.day_names')[6] # Monday [email protected] do |date| - if(date.wday == 0) # if date is sunday %tr %td=date.to_s - else %td=date.to_s This doesn't work the way I want. The %tds for the non-sunday days appear outside of the %tr: <tr> <td>2010-04-24</td> </tr> <td>2010-04-25</td> <td>2010-04-26</td> <td>2010-04-27</td> <td>2010-04-28</td> <td>2010-04-29</td> <td>2010-04-30</td> I tried adding two more spaces to the else but then haml complained about improper identation. What's the best way to do this? Note: I'm not interested on rendering the calendar using unordered lists. Please don't suggest that.

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• paperclip overwrites / resets S3 permissions for non-bucket-owners

  - by adriandz

  I have opened this as an issue on Github (http://github.com/thoughtbot/paperclip/issues/issue/225) but on the chance that I'm just doing this wrong, I thought I'd also ask about it here. If someone can tell me where I'm going wrong, I can close the issue and save the Paperclip guys some trouble. Issue: When using S3 for storage, and you wish your bucket to allow access to other users to whom you have granted access, Paperclip appears to overwrite the permissions on the bucket, removing access to these users. Process for duplication: Create a bucket in S3 and set up a Rails app with Paperclip to use this bucket for storage Add a user (for example, [email protected], the user for the video encoding service Zencoder) to the bucket, and grant this user List and Read/Write permissions. Upload a file. Refresh the permissions. The user you added will be gone. As well, a user "Everyone" with read permissions will have been added. The end result is that you cannot, so far as I can tell, retain desired permissions on your bucket when using Paperclip and S3. Can anyone help?

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• Which apache worker to use with passenger and how?

  - by Millisami

  I've this config in my apache2.conf <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # worker MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_worker_module> StartServers 2 MaxClients 15 MinSpareThreads 4 MaxSpareThreads 5 ThreadsPerChild 15 MaxRequestsPerChild 50000 </IfModule> Now I'm confused here. Which module gets loaded on which conditions? The phusion guys have suggested to use the worker module. Since both are present in apache conf file, do I have to comment the mpm_prefork_module or leave it as it is? Following is my passenger conf file for apache: LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/ext/apache2/mod_passenger.so PassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4 PassengerRuby /usr/bin/ruby1.8 PassengerMaxPoolSize 3 PassengerPoolIdleTime 999999 RailsFrameworkSpawnerIdleTime 0 RailsAppSpawnerIdleTime 0 I'm running just a single Rails 2.3.2 app on 256MB slice at slicehost. I'm not quite satisfied with the performance yet. Are the settings above are any good??

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• code to ping websites works sometimes ...

  - by trustfundbaby

  I'm testing out a piece of code to ping a bunch of websites I own on a regular basis, to make sure they're up. I'm using rails and so far I have this hideous test action that I'm using to try it out (see below). The problem though, is that sometimes it works, and other times it won't ... sometimes it runs through the code just fine, other times, it seems to completely ignore the begin/rescue block ... a. I need help figuring out what the problem is b. And refactoring this to make it look respectable. Your help is much appreciated. require 'net/http' require 'uri' def ping @sites = NewsSource.all @sites.each do |site| if site.uri and !site.uri.empty? uri = URI.parse(site.uri) response = nil path = uri.path.blank? ? '/' : uri.path path = uri.query.blank? ? path : "#{path}?#{uri.query}" begin Net::HTTP.start(uri.host, uri.port) {|http| http.open_timeout = 30 http.read_timeout = 30 response = http.head(path) } if response.code.eql?('200') or response.code.eql?('301') or response.code.eql?('302') site.up = true else site.up = false end site.up_check_msg = response.message site.up_check_code = response.code rescue Errno::EBADF rescue Timeout::Error site.up = false site.up_check_msg = 'timeout' site.up_check_code = '408' end site.up_check_time = 0.seconds.ago site.save end end end

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• How do I get save (no exclamation point) semantics in an ActiveRecord transaction?

  - by James A. Rosen

  I have two models: Person and Address which I'd like to create in a transaction. That is, I want to try to create the Person and, if that succeeds, create the related Address. I would like to use save semantics (return true or false) rather than save! semantics (raise an ActiveRecord::StatementInvalid or not). This doesn't work because the user.save doesn't trigger a rollback on the transaction: class Person def save_with_address(address_options = {}) transaction do self.save address = Address.build(address_options) address.person = self address.save end end end (Changing the self.save call to an if self.save block around the rest doesn't help, because the Person save still succeeds even when the Address one fails.) And this doesn't work because it raises the ActiveRecord::StatementInvalid exception out of the transaction block without triggering an ActiveRecord::Rollback: class Person def save_with_address(address_options = {}) transaction do save! address = Address.build(address_options) address.person = self address.save! end end end The Rails documentation specifically warns against catching the ActiveRecord::StatementInvalid inside the transaction block. I guess my first question is: why isn't this transaction block... transacting on both saves?

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• Ruby 1.9 GarbageCollector, GC.disable/enable

  - by seb

  I'm developing a Rails 2.3, Ruby 1.9.1 webapplication that does quite a bunch of calculation before each request. For every request it has to calculate a graph with 300 nodes and ~1000 edges. The graph and all its nodes, edges and other objects are initialized for every request (~2000 objects) - actually they are cloned from an uncalculated cached graph using Marshal.load(Marshal.dump()). Performance is quite an issue here. Right now the whole request takes in average 150ms. I then saw that during a request, parts of the calculation randomly take longer. Assuming, that this might be the GarbageCollector kicking in, I wrapped the request in GC.disable and GC.enable, so that the request waits with garbagecollecting until calculating and rendering have finished. def query GC.disable calculate respond_to do |format| format.html {render} end GC.enable end The average request now takes about 100ms (50 ms less). But I'm unsure if this is a good/stable solution, I assume there must be drawbacks doing that. Does anybody has experience with a similar problem or sees problems with the above code?

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• missing rake tasks ??

  - by richard moss

  hi I have ran gem install rails and am running 2.3.4 but i am missing some rake tasks like 'db' and 'gems' if i run rake -T i get the following tasks. How can i get all the others ? rake apache2 # Build Apache 2 module rake clean # Remove compiled files rake clobber # Remove all generated files rake default # Build everything rake doc # Generate all documentation rake doxygen # Generate Doxygen C++ API documentation if ... rake doxygen:clobber # Remove generated Doxygen C++ API documenta... rake doxygen:force # Force generation of Doxygen C++ API docume... rake fakeroot # Create a fakeroot, useful for building nat... rake nginx # Build Nginx helper server rake package # Build all the packages rake package:clean # Remove package products rake package:debian # Create a Debian package rake package:force # Force a rebuild of the package files rake package:gem # Build the gem file passenger-2.2.4.gem rake rdoc # Build the rdoc HTML Files rake rdoc:clobber # Remove rdoc products rake rdoc:force # Force a rebuild of the RDOC files rake sloccount # Run 'sloccount' to see how much code Passe... rake test # Run all unit tests and integration tests rake test:cxx # Run unit tests for the Apache 2 and Nginx ... rake test:integration # Run all integration tests rake test:integration:apache2 # Run Apache 2 integration tests rake test:integration:nginx # Run Nginx integration tests rake test:oxt # Run unit tests for the OXT library rake test:rcov # Run coverage tests for the Ruby libraries rake test:restart # Run the 'restart' integration test infinit... rake test:ruby If anyone knows why this has happened, how i can fix it or anything else that could help, please let me know thanks alot rick

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• Redirecting from an update action to the referrer of the edit

  - by Mark Westling

  My Rails 2.3 application has a User model and the usual controller actions. The edit form can be reached two ways: when a user edits his own profile from the home page, or when an admin user edits someone else's profile from users collection. What I'd like to do is have the update action redirect back to the referred of the edit action, not the update action. If I do a simple redirect_to(:back) within update, it goes back to the edit form -- not good. One solution is to forget entirely about referrers and redirect based on the current_user and the updated user: if they're the same, go back to the home page, else go to the users collection page. This will break if I ever add a third path to the edit form. It's doubtful I'll ever do this but I'd prefer a solution that's not so brittle. Another solution is to store the referrer of edit form in a hidden field and then redirect to this value from inside the update action. This doesn't feel quite right, though I can't explain why. Are there any better approaches? Or, should I stop worrying and go with one of the two I've mentioned?

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• Workling processes multiplying uncontrolably

  - by adam

  Hello there. We have a rails app running on passenger and we background process some tasks using a combination of RabbitMQ and Workling. The workling's worker process is started using the script/workling_client command. There is always only one worker process started, and the script/workling_client has a :multiple => false options, thus allowing only one instance. But sometimes, under mysterious circumstances which I haven't been able to track down, more worklings spawn up. If I let the system run for some time, more and more worklings appear. I'm not sure if these rogue worklings cause any problems, but it is still unsettling not to know why is it happening. We are using Monit to monitor the workling process. So if it dies, it will spawn it up again. But this still does not explain how come there are suddenly more than one of them. So my question is: does anyone know what can be cause of this and how to make it stop? Is it possible that workling sometimes dies by itself, without deleting it's pid file? Could there be something wrong with the Daemons gem workling_client is build upon?

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• Amazon access key showing in URL for Carrierwave and Fog

  - by kcurtin

  I just switched from storing my images uploaded via Carrierwave locally to using Amazon s3 via the fog gem in my Rails 3.1 app. While images are being added, when I click on an image in my application, the URL is providing my access key and a signature. Here is a sample URL (XXX replaced the string with the info): https://s3.amazonaws.com/bucketname/uploads/photo/image/2/IMG_4842.jpg?AWSAccessKeyId=XXX&Signature=XXX%3D&Expires=1332093418 This is happening in development (localhost:3000) and when I am using heroku for production. Here is my uploader: class ImageUploader < CarrierWave::Uploader::Base include CarrierWave::RMagick storage :fog def store_dir "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}" end process :convert => :jpg process :resize_to_limit => [640, 640] version :thumb do process :convert => :jpg process :resize_to_fill => [280, 205] end version :avatar do process :convert => :jpg process :resize_to_fill => [120, 120] end end And my config/initializers/fog.rb : CarrierWave.configure do |config| config.fog_credentials = { :provider => 'AWS', :aws_access_key_id => 'XXX', :aws_secret_access_key => 'XXX', } config.fog_directory = 'bucketname' config.fog_public = false end Anyone know how to make sure this information isn't available?

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• Ruby open_id_authentication with Google OpenID

  - by Patrick Daryll Glandien

  I am in my first steps of implementing OpenID in my Rails app. open_id_authentication appeared to be a fairly easy-to-use plugin, which is why I decided to use it. Logging in with my Google account seems to work perfectly, however I do not get the sreg/AX fields that I require. My code is currently as follows: class SessionsController < ApplicationController def new; end def create open_id_authentication end protected def open_id_authentication authenticate_with_open_id(params[:openid_identifier], :required => ["http://axschema.org/contact/email"]) do |result, identity_url, registration| if result.successful? p registration.data @current_user = User.find_by_identity_url(identity_url) if @current_user successful_login else failed_login "Sorry, no user by that identity URL exists (#{identity_url})" end else failed_login result.message end end end private def successful_login session[:user_id] = @current_user.id redirect_to(root_url) end def failed_login(message) flash[:error] = message redirect_to(new_session_url) end end I have already read various discussions about Google OpenID and all only say that you need to require the AX schema instead of the sreg field email, but even when I am doing so (as you can see in the code above), registration.data will remain empty ({}). How do I effectively require the email from most OpenID providers with open_id_authentication?

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• On saving an new active record, in what order are the associated objects saved?

  - by Bryan

  In rails, when saving an active_record object, its associated objects will be saved as well. But has_one and has_many association have different order in saving objects. I have three simplified models: class Team < ActiveRecord::Base has_many :players has_one :coach end class Player < ActiveRecord::Base belongs_to :team validates_presence_of :team_id end class Coach < ActiveRecord::Base belongs_to :team validates_presence_of :team_id end I expected that when team.save is called, team should be saved before its associated coach and players. I use the following code to test these models: t = Team.new team.coach = Coach.new team.save! team.save! returns true. But in another test: t = Team.new team.players << Player.new team.save! team.save! gives the following error: > ActiveRecord::RecordInvalid: > Validation failed: Players is invalid I figured out that team.save! saves objects in the following order: 1) players, 2) team, and 3) coach. This is why I got the error: When a player is saved, team doesn't yet have a id, so validates_presence_of :team_id fails in player. Can someone explain to me why objects are saved in this order? This seems not logical to me.

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• Problem accessing variable in a nested form partial

  - by brad

  I have a nested form in a rails view that is called like this <% f.fields_for :invoice_item_numbers do |item_no_form| %> <%= render 'invoice_item_number', :f => item_no_form %> <% end %> and the partial (_invoice_item_number.html.erb) looks like this <div class='invoice_item_numbers'> <% if f.object.new_record? %> <li><%= f.label :item_number %><%= f.text_field :item_number %> <%= link_to_function "remove", "$(this).parent().remove()", :class => 'remove_link' %></li> <% else %> <li class="inline"><%= f.label :item_number %><%= f.text_field :item_number %> </li><li class="inline"><%= f.label :description %><%= invoice_item_number.description %></li><li><%= f.label :amount %><%= f.text_field :amount %> <%= f.check_box '_destroy', :class => 'remove_checkbox' %> <%= f.label '_destroy', 'remove', :class => 'remove_label' %></li> <% end %> </div> This fails with the error message undefined method `description' for nil:NilClass Why does invoice_item_number return a nil object in this partial? It is obviously being defined somehow because if I change it to something else (e.g. item_number.description then the error message becomes undefined local variable or methoditem_number' for #instead. The invoice_item_number object that is being displayed by this partial is being used perfectly well by the form helpers as<%= f.text_field :item_number %and<% f.text_field :amount %both work perfectly well. I have tried a number of solutions such as using@invoice_item_number` and explicitly defining an object in the render method but these have not worked. Presumably there is a very simple answer to this.

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• ActiveRecord exceptions not rescued

  - by zoopzoop

  I have the following code block: unless User.exist?(...) begin user = User.new(...) # Set more attributes of user user.save! rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotUnique => e # Check if that user was created in the meantime user = User.exists?(...) raise e if user.nil? end end The reason is, as you can probably guess, that multiple processes might call this method at the same time to create the user (if it doesn't already exist), so while the first one enters the block and starts initializing a new user, setting the attributes and finally calling save!, the user might already be created. In that case I want to check again if the user exists and only raise the exception if it still doesn't (= if no other process has created it in the meantime). The problem is, that regularly ActiveRecord::RecordInvalid exceptions are raised from the save! and not rescued from the rescue block. Any ideas? EDIT: Alright, this is weird. I must be missing something. I refactored the code according to Simone's tip to look like this: unless User.find_by_email(...).present? # Here we know the user does not exist yet user = User.new(...) # Set more attributes of user unless user.save # User could not be saved for some reason, maybe created by another request? raise StandardError, "Could not create user for order #{self.id}." unless User.exists?(:email => ...) end end Now I got the following exception: ActiveRecord::RecordNotUnique: Mysql::DupEntry: Duplicate entry '[email protected]' for key 'index_users_on_email': INSERT INTO `users` ... thrown in the line where it says 'unless user.save'. How can that be? Rails thinks the user can be created because the email is unique but then the Mysql unique index prevents the insert? How likely is that? And how can it be avoided?

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• What is the best way using multiple lines of <% %> Tag or <% %> Tag with multiple lines?

  - by Salil

  Sorry if the title is not enough to understand what i am asking about. I am rails developer and i used multiple lines of <% % in my views but now i realized that it's not best practice so i came here and like to you all excellent guys what is the correct way in ROR? For example if i required to something like following <% user =User.all %> <% name= [] %> <% count = 0 %> <% for user in users %> <% name << user.name %> <% count+=1%> <% end %> Can i do it as follows ? <% user =User.all name= [] count = 0 for user in users name << user.name count+=1 end %> I know better way of collecting element from array But above is just example. But my question is, is it possible and if yes which is the correct way?

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• what is a RoR best practice? match by id or different column?

  - by Omnipresent

  I had a terrible morning. Lots of emails floating around about why things don't work. Upon investigating I found that there is a data mismatch which is causing errors. Scenario Customer and Address are two tables. Customer contains class Customer < ActiveRecord::Base has_one :address, :foreign_key => "id" end Address Contains class Address < ActiveRecord::Base belongs_to :customer, :foreign_key => "cid" end So the two tables match on id which is the default and that column is auto incremented. Problem on the edit Page we have some code like this. params[:line1] = @customer.first.address.line1 It fails because no matching record is found for a customer in the address table. I don't know why this is happening. It seems that over time a lot of records did not get added to Address table. Now problem is that when a new Customer is added (say with id 500) the Address will be added with some other id (say 425) ...now you don't know which address belongs to which customer. Question Being new to Rails, I am asking whether it is always considered good to create an extra column for joining of the records, rather than depending on the column that is automatically incremented? If I had a seperate column in Address table where I would manually insert the recently added customers id then this issue would not have come up.

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• Multiple remote_form_for on the same page causes duplicate ids

  - by Ben Scheirman

  I've got a rails app that displays a list of items called modules. I'm iterating over these, rendering a partial for each one that includes a remote_form_for call. This all works, but fails HTML validation because my form text fields all have the same id. Is there a :prefix option on the form (or something else) I can use to get around this? Update: (some code) //_module_form.html.erb <% remote_form_for app_module do |f| %> <%= f.label :name %> <%= f.text_field :name %> <%= submit_tag 'Save' %> <%end %> //parent page <% @thing.modules.each do |app_module| %> <%= render :partial => "module_form", :locals => { :app_module => app_module } %> <% end %> So if I have more than 1 item in the collection, I render the identical form on the same page, and the form id and textbox id are duplicated. I can customize the form id pretty easily, but what about the text_box, since the controller is looking for specific named controls?

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• Action Mailer: How do I render dynamic data in an email body that is stored in the database?

  - by Brandon Toone

  I have Action Mailer setup to render an email using the body attribute of my Email model (in the database). I want to be able to use erb in the body but I can't figure out how to get it to render in the sent email message. I'm able to get the body as a string with this code # models/user_mailer.rb def custom_email(user, email_id) email = Email.find(email_id) recipients user.email from "Mail It Example <[email protected]>" subject "Hello From Mail It" sent_on Time.now # pulls the email body and passes a string to the template views/user_mailer/customer_email.text.html.erb body :msg => email.body end I came across this article http://rails-nutshell.labs.oreilly.com/ch05.html which says I can use render but I'm only able to get render :text to work and not render :inline # models/user_mailer.rb def custom_email(user, email_id) email = Email.find(email_id) recipients user.email from "Mail It Example <[email protected]>" subject "Hello From Mail It" sent_on Time.now # body :msg => email.body body :msg => (render :text => "Thanks for your order") # renders text and passes as a variable to the template # body :msg => (render :inline => "We shipped <%= Time.now %>") # throws a NoMethodError end

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• Does CSS have a "start over" feature?

  - by Rick Wayne

  I'm using calendar_date_select (henceforth CDS) in a Rails application, and have a stupid question. When I embed the CDS component in the middle of an already-CSS-styled page, all manner of things go ugly-wrong with it (spacing, fonts, etc.). Clearly the elements inside the CDS have inherited unwanted stuff from the styles already working in the containing page. Now, I could use a combination of, say, Safari's CSS debugging and analyze what's wrong element-by-element. But that's (A) tedious, and (B) might load up my component's styles with tons of container-defeating special cases. If nothing else, I'm certain to change the containing page's styles in the future and would have to maintain the special cases. My question: Is is possible to have a DIV in a page that essentially backs out all the existing styling? Is there a simple one-liner that will do this? Failing that, can it be done on an element-by-element basis? E.g. I know what tags the CDS generates, so I could list each of them: { p: "#--NOTHING--#"; a: "#--NOTHING--#"; } where #--NOTHING--# is the Magic Turn Off All Inherited Styles incantation. http://code.google.com/p/calendardateselect/ Thanks, peeps.

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• Git + GitHub + Heroku

  - by Haseeb Khan

  Hi All, I am new to the world of Git, GitHub and Heroku. So far, I am enjoying this paradigm but coming from a background with SVN, things seems a bit complicated to me in the world of Git. I am facing a problem for which I am looking for a solution. Scenario: I have setup a new private project on GitHub. I forked the private project and now I have the following structure in my branch: /project /apps /my-apps /my-app-1 .... /my-app-2 .... /your-apps /your-app-1 .... /your-app-2 .... /plugins .... I can commit the code in my Fork on GitHub from my machine in any of the folders I want. Later on, these would be pulled into the master repository by the admin of the project. For every individual application in the apps folder, I have setup an app on Heroku which is a Git Repo in itself where I push my changes when I am done with the user stories from my local machine. In short, every app in the apps folder is a Rails App hosted on Heroku. Problem: What I want is that when I push my changes into Heroku, they can be committed into my project fork on GitHub as well, so, it also has the latest code all the time. The issue I see is that the code on Heroku is a Git Repo while the folders which I have on GitHub are part of a Repo. So far, what I have researched is that there is something known as Submodule in the Git World which can come to the rescue, however, I have not been able to find some newbie instructions. Can someone in the community be kind enough to share thoughts and help me to identify the solution of this problem? Thanks in advance. Regards, Haseeb Khan haseeb [AT] tkxel.com TkXel

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