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  • Problem with Railscast #197 - Nested Model Form Part 2

    - by sscirrus
    I'm trying to implement Ryan's Railscast #197 in a system with Questions, Answers, and (multiple choice) Options. http://railscasts.com/episodes/197-nested-model-form-part-2. I have successfully implemented the nesting among these forms/partials. The simpler 'check box' way to delete records works properly. The problem occurs when I try to add/delete records. I have copied the code exactly as it appears in his Railscast: #new.html.erb <%= javascript_include_tag :defaults, :cache => true %> <% f.fields_for :in_options do |builder| %> <%= render "option_fields", :f => builder %> <% end %> #_option_fields.html.erb partial <%= f.hidden_field :_destroy %> <%= link_to_function "remove", "remove_fields(this)" %> #application_helper.rb (exact same as #197) def link_to_remove_fields(name, f) f.hidden_field(:_destroy) + link_to_function(name, "remove_fields(this)") end def link_to_add_fields(name, f, association) new_object = f.object.class.reflect_on_association(association).klass.new fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder| render(association.to_s.singularize + "_fields", :f => builder) end link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")) end #application.js (exact same as #197. I have an Event.addbehavior below this code.) function remove_fields(link) { $(link).previous("input[type=hidden]").value = "1"; $(link).up(".fields").hide(); } function add_fields(link, association, content) { var new_id = new Date().getTime(); var regexp = new RegExp("new_" + association, "g") $(link).up().insert({ before: content.replace(regexp, new_id) }); } 2 problems: When I click on the 'remove' link it doesn't remove - it just shifts the page up or down. When I include link_to_add_fields "Add Answer", f, :answers, I get undefined method `klass' for nil:NilClass. Thanks everyone.

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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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  • 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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  • adding visual effects to RJS before action rendered

    - by Sam
    I just started using RJS which is awesome however I am used to putting visual effects in the link_to_remote and such and I'm not sure how to trigger actions before and after remotes are triggered. Take this link for example: HTML <span id="<%= "edit_comment_link_#{comment.id.to_s}"%>" style="float:left;"> <%= link_to_remote "edit", {:update => "comment_#{comment.id.to_s}", :url => edit_post_comment_path(comment.post, comment), :method => :get}%> | </span> Controller: def edit @comment = Comment.find(params[:id]) respond_to do |format| #format.html render edit_comment_path(@comment) format.js end end RJS: page.replace_html "edit_comment_link_#{@comment.id.to_s}", "currently editing | " So is RJS mainly for after actions are rendered visual effects such as a spinner should be put into the link_to_remote with call_backs? Is this a good way of doing things?

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  • Securely persist session between https://secure.yourname.com and http://www.yourname.com on rails ap

    - by Matt
    My rails site posts to a secure host (e.g. 'https://secure.yourname.com') when the user logs into the site. Session data is stored in the database, with the cookie containing only the session ID. The problem is that when the user returns to a non-https page, such as the home page (e.g. 'http://www.yourname.com') the user appears to have logged out. I believe the reason for this is that a separate cookie is stored for each host (www vs. secure). Is this correct? What is the best secure way to persist the session between both the http and https sections of the site? Does anyone know of any plugins that address this problem? The site runs on Heroku.

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  • Rails 3.o MYSQL connection problem

    - by palani
    Hi I have installed RVM in my ubunut linux box and configured the Rails 3 app in that ... i can able to start app server... my problem is when i invoke http://localhost:3000 . i getting the follwing error Mysql::Error (Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)): I checked mysqld service is running well. I checked my database.yml file .... the defined well development: adapter: mysql encoding: utf8 reconnect: false database: test_development username: root password: admin socket: /var/run/mysqld/mysqld.sock my installed mysql gem version is 2.8.1.... I really don't know what is the problem here....

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  • has_many through a habtm relationship in Rails

    - by macek
    I'm trying to define a has_many X, :through => Y where Y is a habtm relationship. Rails is throwing a fit about this. See comment in user model: class User < ActiveRecord::Base has_many :posts # I want to display a list of all tags this user is involved in has_many :tags, :through => :posts # ERROR end class Post < ActiveRecord::Base has_and_belongs_to_many :tags end class Tag < ActiveRecord::Base has_and_belongs_to_many :posts end What can I do to fix this?

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  • Can't figure out how to use db:seed for rails in netbeans

    - by user317766
    can't seem to get my seeds.rb file to run through the command "rake db:seed". I'm using netbeans and I'm a beginner to rails, so I could be doing something really simple and stupid =/. I know you're meant to put your seeds.rb file in the db directory but netbeans doesn't seem to have one or might have renamed it... any help out there? Thanks in advance!

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  • Rails - How do i update a records value in a join model ?

    - by ChrisWesAllen
    I have a join model in a HABTM relationship with a through association (details below). I 'm trying to find a record....find the value of that records attribute...change the value and update the record but am having a hard time doing it. The model setup is this User.rb has_many :choices has_many :interests, :through => :choices Interest.rb has_many :choices has_many :users, :through => :choices Choice.rb belongs_to :user belongs_to :interest and Choice has the user_id, interest_id, score as fields. And I find the ?object? like so @choice = Choice.where(:user_id => @user.id, :interest_id => interest.id) So the model Choice has an attribute called :score. How do I find the value of the score column....and +1/-1 it and then resave? I tried @choice.score = @choice.score + 1 @choice.update_attributes(params[:choice]) flash[:notice] = "Successfully updated choices value." but I get "undefined method score"......What did i miss?

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  • Determine if count of related model > 0

    - by Lowgain
    I have a model called Stem. I need a 'thumbs up' feature, so I have created a second model called Thumb, which consists of stem_id and user_id. I'm also using the restful authentication plugin for user credentials. I have the 'thumbs up' button working, which adds a row to the thumbs table fine, but I'd like to be able to check if the currently logged in user has already given a thumbs up to this particular stem. I tried adding this to the Stem model: def thumbed Thumb.count_by_sql ["SELECT COUNT(*) FROM thumbs WHERE user_id = ? AND stem_id = ?", current_user.id, self.id ] end The problem here is that the stem model has no access to the current_user variable the the controllers have. Is there a way I can get access to this property, or alternatively, is there another way I could go about checking this? I was hoping to get this as a property in the model because the stems are passed over to a Flex app using RubyAMF. Thanks!

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  • Please suggest some alternative to Drupal

    - by abovesun
    Drupal propose completely different approach in web development (comparing with RoR like frameworks) and it is extremely good from development speed perspective. For example, it is quite easy to clone 90% of stackoverflow functionality using Drupal. But it has several big drawbacks: it is f''cking slow (100-400 requests per page) db structure very complicated, need at least 2 tables for easy content (entity) type, CCK fields very easy generate tons of new db tables anti-object oriented, rather aspect-oriented bad "view" layer implementation, no strange forward layouts and so on. After all this items I can say I like Drupal, but I would like something same, but more elegant and more object oriented. Probably something like http://drupy.net/ - drupal emulation on the top of django. P.S. I wrote this question not for new holy word flame, just write if you know alternative that uses something similar approach.

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  • Is it Me or Are Rails and Django Difficult to Install on Windows?

    - by Mackristo
    I tried getting these frameworks working on Windows Vista for a couple of days but to no avail. Every single time I thought I had them working I would get some random error involving the PostgreSQL or MySQL setup, or the paths were screwed up or some other command line error "not recognized as an internal or external command" (or something). Someone told me that these frameworks are a lot easier to get running on Ubuntu but I really don't want to make that switch as everything I have is on Windows. Are these common problems when trying to get running on Windows? I think I'll just stick with C# and .NET as everything seems to work pretty nicely together with none of this "install-twenty-different-components" stuff and see if they work together. Is Instant Django advisable to use?

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  • Solution for social network + marketplace with multiple sellers?

    - by user261231
    I want to build a social network, with some of the users being able to put up some stuff up for sale. So basically, a social network + multiple sellers e-commerce. What is the best technology solution for that? I was thinking of going Rails route, using CommunityEngine and ActiveMerchant. Another option is going PHP and using something like X-Cart, which already has multiple sellers interface. Any recommendations? Thanks!

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  • Rails nested models and data separation by scope

    - by jobrahms
    I have Teacher, Student, and Parent models that all belong to User. This is so that a Teacher can create Students and Parents that can or cannot log into the app depending on the teacher's preference. Student and Parent both accept nested attributes for User so a Student and User object can be created in the same form. All four models also belong to Studio so I can do data separation by scope. The current studio is set in application_controller.rb by looking up the current subdomain. In my students controller (all of my controllers, actually) I'm using @studio.students.new instead of Student.new, etc, to scope the new student to the correct studio, and therefore the correct subdomain. However, the nested User does not pick up the studio from its parent - it gets set to nil. I was thinking that I could do something like params[:student][:user_attributes][:studio_id] = @student.studio.id in the controller, but that would require doing attr_accessible :studio_id in User, which would be bad. How can I make sure that the nested User picks up the same scope that the Student model gets when it's created? student.rb class Student < ActiveRecord::Base belongs_to :studio belongs_to :user, :dependent => :destroy attr_accessible :user_attributes accepts_nested_attributes_for :user, :reject_if => :all_blank end students_controller.rb def create @student = @studio.students.new @student.attributes = params[:student] if @student.save redirect_to @student, :notice => "Successfully created student." else render :action => 'new' end end user.rb class User < ActiveRecord::Base belongs_to :studio accepts_nested_attributes_for :studio attr_accessible :email, :password, :password_confirmation, :remember_me, :studio_attributes devise :invitable, :database_authenticatable, :recoverable, :rememberable, :trackable end

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  • Rails, How can I combine multiple model attributes to create a unique permalink using permalink_fu?

    - by Ranknoodle
    Can Permalink_fu combine 2 or more model attributes to create a unique permalink? Let's say I have a Business Model, this model contains :name, :address, :phone, :city, :state, :country etc. attributes. Right now I have permalink set up in this model only for :name has_permalink :name So I would get "/biz/name". However I would like to combine the Business name, city, and a incremental number if there are more than 1 location in the city for that business. For example I would like to use: "/biz/joes-coffee-shack-chicago" for the permalink or if a multple location business "/biz/starbucks-chicago-92" Is this possible with the current permalink_fu plugin or some fork of permalink_fu? Or will this require some modification to the permalink_fu plugin?

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  • Rails' page caching vs. HTTP reverse proxy caches

    - by John Topley
    I've been catching up with the Scaling Rails screencasts. In episode 11 which covers advanced HTTP caching (using reverse proxy caches such as Varnish and Squid etc.), they recommend only considering using a reverse proxy cache once you've already exhausted the possibilities of page, action and fragment caching within your Rails application (as well as memcached etc. but that's not relevant to this question). What I can't quite understand is how using an HTTP reverse proxy cache can provide a performance boost for an application that already uses page caching. To simplify matters, let's assume that I'm talking about a single host here. This is my understanding of how both techniques work (maybe I'm wrong): With page caching the Rails process is hit initially and then generates a static HTML file that is served directly by the Web server for subsequent requests, for as long as the cache for that request is valid. If the cache has expired then Rails is hit again and the static file is regenerated with the updated content ready for the next request With an HTTP reverse proxy cache the Rails process is hit when the proxy needs to determine whether the content is stale or not. This is done using various HTTP headers such as ETag, Last-Modified etc. If the content is fresh then Rails responds to the proxy with an HTTP 304 Not Modified and the proxy serves its cached content to the browser, or even better, responds with its own HTTP 304. If the content is stale then Rails serves the updated content to the proxy which caches it and then serves it to the browser If my understanding is correct, then doesn't page caching result in less hits to the Rails process? There isn't all that back and forth to determine if the content is stale, meaning better performance than reverse proxy caching. Why might you use both techniques in conjunction?

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  • Action Controller: Exception - ID not found

    - by Danny McClelland
    Hi Everyone, I am slowly getting the hang of Rails and thanks to a few people I now have a basic grasp of the database relations and associations etc. You can see my previous questions here: http://stackoverflow.com/questions/2714621/rails-database-relationships I have setup my applications models with all of the necessary has_one and has_many :through etc. but when I go to add a kase and choose from a company from the drop down list - it doesnt seem to be assigning the company ID to the kase. You can see a video of the the application and error here: http://screenr.com/BHC You can see a full breakdown of the application and relevant source code at the Git repo here: http://github.com/dannyweb/surveycontrol If anyone could shed some light on my mistake I would be appreciate it very much! Thanks, Danny

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  • Rails accepts_nested_attributes_for callbacks

    - by Rabbott
    I have two models Ticket and TicketComment, the TicketComment is a child of Ticket. ticket.rb class Ticket < ActiveRecord::Base has_many :ticket_comments, :dependent => :destroy, :order => 'created_at DESC' # allow the ticket comments to be created from within a ticket form accepts_nested_attributes_for :ticket_comments, :reject_if => proc { |attributes| attributes['comment'].blank? } end ticket_comment.rb class TicketComment < ActiveRecord::Base belongs_to :ticket validates_presence_of :comment end What I want to do is mimic the functionality in Trac, where if a user makes a change to the ticket, and/or adds a comment, an email is sent to the people assigned to the ticket. I want to use an after_update or after_save callback, so that I know the information was all saved before I send out emails. How can I detect changes to the model (ticket.changes) as well as whether a new comment was created or not (ticket.comments) and send this update (x changes to y, user added comment 'text') in ONE email in a callback method?

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  • When to Store Temporary Values in Hidden Field vs. Session vs. Database?

    - by viatropos
    I am trying to build a simple OpenID login panel similar to how Stack Overflow's works. The goal is: User clicks OpenID/Oauth provider OpenID/Oauth stuff happens, we end up with the result (already made that) Then we want to confirm that the user wants to actually create a new account (vs. associating account with another OpenID account). In StackOverflow, they keep a hidden field on a form that looks like this: <form action="/users/openidconfirm" method="post"> <p>This is an OpenID we haven't seen on Stack Overflow before:</p> <p class="openid-identifier">https://me.yahoo.com/a/some-hash</p> <p>Do you want to associate this OpenID with your Stack Overflow account?</p> <div> <input type="hidden" name="fkey" value="9792ab2zza1q2a4ac414casdfa137eafba7"> <input type="hidden" name="s" value="c1a3q133-11fa-49r0-a7bz-da19849383218"> <input type="submit" value="Associate OpenID"> <input type="button" value="Cancel" onclick="window.location.href = 'http://stackoverflow.com/users/169992/viatropos?s=c1a3q133-11fa-49r0-a7bz-da19849383218'"> </div> </form> Initial question is, what are those hashes fkey and s? Not that I really care what these specific hashes are, but what it seems like is happening is they have processed the openid response and saved it to the DB in a temporary object or something, and from there they generate these keys, because they don't look like Oauth keys to me. Main situation is: after I have processed OpenID/Oauth responses, I don't yet want to create a new user/account until the user submits the "confirm" form. Should I store the keys and tokens temporarily in a "Confirm" form like this? Or is there a better way? It seems that using a temp database object would be a lot of work to manage properly. Thanks for the help. Lance

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  • Distribute CouchDB as part of a Rails app?

    - by AaronThomson
    I am working on a Rails project and the Architect has asked me to investigate bundling CouchDB into to application so that it can be deployed by Capistrano across multiple platforms and managed by Rake. My expectation was that I could set up the Erlang VM on the various environments and then distribute the CouchDB application with Capistrano. However I can't find any option to download CouchDB without the Erlang runtime. I can, however see an option to build CouchDB from source which I assume is platform dependent. I am new to Erlang and CouchBD, am I missing something? Is there a way to bundle CouchDB into a Rails app and distribute it across multiple platforms?

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  • Has any one used client_side_validations gem with Chosen.js dropdown?

    - by Abid
    I am using chosen.js (http://harvesthq.github.com/chosen/). I was wondering if anyone has been able to use chosen select boxes and client_side_validations together. The issue is that when we use chosen it hides the original select element and renders its own dropdown instead, and when we focus out the validation isn't called and also when the validation message is shown it is shown with the original select element so positioning of the error isnt also correct. What could be a good way to handle this, My be we can change some code inside ActionView::Base.field_error_proc which currently looks something like ActionView::Base.field_error_proc = Proc.new do |html_tag, instance| unless html_tag =~ /^<label/ %{<div class="field_with_errors">#{html_tag}<label for="#{instance.send(:tag_id)}" class="message">#{instance.error_message.first}</label></div>}.html_safe else %{<div class="field_with_errors">#{html_tag}</div>}.html_safe end end Any ideas ? Edit 1: I have the following solution that is working for me now. applied a class "chzn-dropdown" to all my selects that were being displayed by chosen used the following callback provided by client_side_validations Gem clientSideValidations.callbacks.element.fail = function(element, message, callback) { if (element.data('valid') !== false) { if(element.hasClass('dropdown')){ chzn_element = $('#'+element.attr('id')+'_chzn'); console.log(chzn_element); chzn_element.append(""+message+""); } else{ callback(); } } } Thanks

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  • How do I fix this NameError?

    - by Kyle Kaitan
    I want to use the value v inside of an instance method on the metaclass of a particular object: v = ParserMap[kind][:validation] # We want to use this value later. s = ParserMap[kind][:specs] const_set(name, lambda { p = Parser.new(&s) # This line starts a new scope... class << p define_method :validate do |opts| v.call(self, opts) # => NameError! The `class` keyword above # has started a new scope and we lost # old `v`. end end p }) Unfortunately, the class keyword starts a new scope, so I lose the old scope and I get a NameError. How do I fix this?

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