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• Rails, using jQuery without jrails

  - by ibuck

  Hello all, I have been trying to convert my rails 2.2.2 app over to jQuery, and would like so without using jrails. The only reference material I can find on the subject is Railscasts Episode 136. Ryan goes over how to use jQuery to post a form and handle the response in a .js.erb file. My questions is has anyone tried to use jQuery with .js.erb files with anchors as the trigger? As a replacement for "link_to_remote". I have gotten jQuery to do a .get to submit this link on click to the controller, but I cannot seem to get it to go into the .js.erb file. Thanks

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• How can I update an expression in a Runt::Schedule object?

  - by Reid Beels

  Runt provides a Schedule class for managing collections of events, each represented by a temporal expression. The Schedule class provides an update method, cited in the release notes as "allowing clients to update existing expressions". The implementation of this method, however, simply calls a supplied block, providing the temporal expression for the specified event (as shown). # From lib/runt/schedule.rb:61 # # Call the supplied block/Proc with the currently configured # TemporalExpression associated with the supplied Event. # def update(event,&block) block.call(@elems[event]) end How is one expected to use this method to update an expression?

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• Dynamic Attachment Size for Paperclip (Rails)

  - by CalebHC

  Is there anyway to have the validates_attachment_size except a dynamic file size limit? Here's an example: class Document < ActiveRecord::Base belongs_to :folder has_attached_file :document validates_attachment_size :document, :less_than => get_current_file_size_limit private def get_current_file_size_limit 10.megabytes # This will dynamically change end end I've tried this but I keep getting an error saying "unknown method". Lambdas and Procs don't work either. Has anyone ever tried this? Thanks

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• Resources for widget creation

  - by Kenji Crosland

  My rails app is about to go live and I'm trying to figure out how to create a widget based on data on the site. My Javascript is not too hot--limited to the O'reilly head first book on JS. I can read simple Javascript okay but when it comes to writing it I'm a little lost. That said, I hope to roll out a widget, maybe a wordpress plugin too soon after my app is launched. Does anyone know of any rails plugins, javascript templates, tutorials or books that can get me going? I did ask a similar question before here: But my limited knowledge of JS kept me from implementing the suggested answer properly.

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• Never render a layout in response to xhrs

  - by Horace Loeb

  Most of the time I don't want to render a layout when the request comes from AJAX. To this end I've been writing render :layout => !request.xhr? frequently in my controller actions. How can I make this the default? I.e., I'd like to be able to write def new Post.find(params[:id]) end and have the functionality be def show Post.find(params[:id]) render :layout => !request.xhr? end (I'm fine manually specifying a layout in the rare cases in which I want to use one.)

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• class method or named_scope?

  - by Hadi

  i would like to have your opinion in a project i am currently working on. class Product has_many :orders end class Order attr_accessor :deliverable # to contain temporary data on how many items can be delivered for this order belongs_to :product end somehow i want to have Order.all_deliverable that will calculate the Product's quantity, subtract from list of Orders until the Product is empty or there is no more Order for this Product to illustrate Product A, quantity: 20 Product B, quantity: 0 Order 1, require Product A, quantity: 12 Order 2, require Product B, quantity: 10 Order 3, require Product A, quantity: 100 so if i call Order.all_deliverable, it will give Order 1, deliverable:12 Order 3, deliverable: 8 #(20-12) i have been thinking on using named_scope, but i think the logic will be too complex to be put in a named_scope. Any suggestion? the pseudo code for all_deliverable will be something like this: go to each orders find the remaining quantity for specific product deduct the product to max amount of order, if product is not enough, add the maximum product add to the order end From what i read around in the web, named_scope deal mostly like find and have not many method calling and looping.

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• How do I reject if exists? for non-nested attributes?

  - by GoodGets

  Currently my controller lets a user submit muliple "links" at a time. It collects them into an array, creates them for that user, but catches any errors for the User to go back and fix. How can I ignore the creation of any links that already exist for that user? I know that I can use validates_uniqueness_of with a scope for that user, but I'd rather just ignore their creation completely. Here's my controller: @links = params[:links].values.collect{ |link| current_user.links.create(link) }.reject { |p| p.errors.empty? } Each link has a url, so I thought about checking if that link.url already exists for that user, but wasn't really sure how, or where, to do that. Should I tack this onto my controller somehow? Or should it be a new method in the model, like as in a before_validation Callback? (Note: these "links" are not nested, but they do belong_to :user.) So, I'd like to just be able to ignore the creation of these links if possible. Like if a user submits 5 links, but 2 of them already exist for him, then I'd just like for those 2 to be ignored, while the other 3 are created. How should I go about doing this?

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• How to test declarative_authorization with rspec

  - by Victor Martins

  Is there a way to test the declarative_authorization permissions with respect? In the documentation it has some instructions to use test unit, but I can't seem to find a way to use rspec.

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• Download all image or create zip file of all uploads from the gallary contained uploads

  - by Arpit Vaishnav

  I am on the photo sharing site , and i want to give functionality to download all the images available in the gallery ,, I have taken gallery in a relation where i can get all the iamges by @gallery.uploads , Now what i want is to download this all files , or if its possible to create any zipfile so that we can download that one file containing uploads inside the gallery , thanks

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• Sinatra application running on Dreamhost suddenly not working

  - by jbrennan

  My Sinatra application was running fine on Dreamhost until a few days ago (I'm not sure precisely when it went bad). Now when I visit my app I get this error: can't activate rack (~> 1.1, runtime) for ["sinatra-1.1.2"], already activated rack-1.2.1 for [] I have no idea how to fix this. I've tried updating all my gems, then touching the app/tmp/restart.txt file, but still no fix. I hadn't touched any files of my app, nor my Dreamhost account. It just busted on its own (my guess is DH changed something on their server which caused the bust). When I originally deployed my app, I had to go through some hoops to get it working, and I seem to think I was using gems in a custom location, but I can't remember exactly where or how. I don't know my way around Rack/Passenger very well. Here's my config.ru: (mostly grafted from around the web, I don't fully understand it) ENV['RACK_ENV'] = 'development' if ENV['RACK_ENV'].empty? #### Make sure my own gem path is included first ENV['GEM_HOME'] = "#{ENV['HOME']}/.gems" ENV['GEM_PATH'] = "#{ENV['HOME']}/.gems:" require 'rubygems' Gem.clear_paths ## NB! key part require 'sinatra' set :env, :production disable :run require 'MY_APP_NAME.rb' run Sinatra::Application

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• Rails 3 time output

  - by Oluf Nielsen

  Hi, I'm now working on my output of the feeds I'm taking in from some site. What I'm currently doing is Time, and i want it to be displayed in a maybe, little be special way.. like this.. today, 14:12 yesterday, 15:34 27/12, 15:24 i have this in my code = news.entry_published.strftime("%d/%m, %H:%M") That gives me an error saying undefined method `strftime' for "2010-12-30 19:26:00.000000":String And it dosn't do what i want with the days.. Edit: - @date = DateTime.strptime(news.entry_published, "%Y-%m-%d %H:%M:%S") = @date.strftime("%d/%m, %H:%M") Now works, and gives this output 30/12, 19:26 But i still have to check if it is today, yesterday or just another day. Cheers, Oluf.

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• Excluding files from being deployed with Capistrano while still under version control with Git

  - by Jimmy Cuadra

  I want to start testing the JavaScript in my Rails apps with qUnit and I'm wondering how to keep the test JavaScript and test runner HTML page under version control (I'm using Git, of course) but keep them off the production server when I deploy the app with Capistrano. My first thought is to let Capistrano send all the code over as usual including the test files, and write a task to delete them at the end of the deployment process. This seems like sort of a hack, though. Is there a cleaner way to tell Capistrano to ignore certain parts of the repository when deploying?

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• A simple factory_girl question

  - by gmile

  I have two factories (post_factory.rb, comment_factory.rb) in separate files. I'd like to create a bit complex factory, which will create a post with associated comments for me. I created a third file, called complex_factory.rb, and wrote the following code: Factory.define :post_with_comments, :parent => :post do |post| post.after_create { |p| Factory(:user_last_state, :post => p) } end But rake spec raises an error, stating that the file is unaware of post and comment factories. At the very next moment, I naïvely wrote requires at the top: require "post_factory.rb" require "comment_factory.rb" But that didn't gave any proper result. Maybe this requires actually looking the wrong direction? Or they pretty much don't matter (as registering factories for visibility might be more complex that I assume). Am I missing something? Any ideas?

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• How to cache render :json

  - by ash34

  Hi, I have a controller index action which returns json output. render :json => my_array.to_json What type of caching do I have to use here. Does 'page caching' make sense for this. Or do I have to do action caching like below caches_action :index thanks, ash

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• cant access nested ressource 'comments' in rails 3.0.1

  - by DannyRe

  Hey, I hope you can help me. /config/routes.rb resources :deadlines do resources :comments end /model/comment.rb class Comment < ActiveRecord::Base belongs_to :post, :class_name = "Post", :foreign_key = "post_id" end /model/post.rb class Post < ActiveRecord::Base has_many :comments end When I want to visit: http://localhost:3000/posts/1/comments/new it says: undefined method `comments_path' for #<#:0x4887138 in _form.html I use 'formtastic' and the _form.html.erb looks like this: <% semantic_form_for [@comment] do |form| % <% form.inputs do % <%= form.input :content % <% end % <% form.buttons do % <%= form.commit_button % <% end % <% end %

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• Search implementation dilemma: full text vs. plain SQL

  - by Ethan

  I have a MySQL/Rails app that needs search. Here's some info about the data: Users search within their own data only, so searches are narrowed down by user_id to begin with. Each user will have up to about five thousand records (they accumulate over time). I wrote out a typical user's records to a text file. The file size is 2.9 MB. Search has to cover two columns: title and body. title is a varchar(255) column. body is column type text. This will be lightly used. If I average a few searches per second that would be surprising. It's running an a 500 MB CentOS 5 VPS machine. I don't want relevance ranking or any kind of fuzziness. Searches should be for exact strings and reliably return all records containing the string. Simple date order -- newest to oldest. I'm using the InnoDB table type. I'm looking at plain SQL search (through the searchlogic gem) or full text search using Sphinx and the Thinking Sphinx gem. Sphinx is very fast and Thinking Sphinx is cool, but it adds complexity, a daemon to maintain, cron jobs to maintain the index. Can I get away with plain SQL search for a small scale app?

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• Showing response time in a rails app.

  - by anshul

  I want to display a This page took x seconds widget at the bottom of every page in my rails application. I would like x to reflect the approximate amount of time the request spent on my server. What is the usual way this is done in Rails?

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• Rails: what are the benefits of using nested routes / forms

  - by Sam

  I am starting to use some nested routes which is definitely a different way of planning things and I'm really failing to see added benefits. So what are they?

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• deploment on EC2 using poolparty and chef server

  - by Pravin

  hi, does anyone have done the rails application deployment on EC2 using poolpary gems and chef server(not chef solo).please share your experiences if you know some blogs or code links(except poolpartyrb.com and related to it). the poolparty script must be able to launch an selected AMI instance with two EBS blocks(data and DB) use one elastic ip,fetch code repo and install chef server on selected instance.or if you have used chef server for rails deployment please share your exp. Thanks, Pravin

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• Rails named_scope across multiple tables

  - by wakiki

  I'm trying to tidy up my code by using named_scopes in Rails 2.3.x but where I'm struggling with the has_many :through associations. I'm wondering if I'm putting the scopes in the wrong place... Here's some pseudo code below. The problem is that the :accepted named scope is replicated twice... I could of course call :accepted something different but these are the statuses on the table and it seems wrong to call them something different. Can anyone shed light on whether I'm doing the following correctly or not? I know Rails 3 is out but it's still in beta and it's a big project I'm doing so I can't use it in production yet. class Person < ActiveRecord::Base has_many :connections has_many :contacts, :through => :connections named_scope :accepted, :conditions => ["connections.status = ?", Connection::ACCEPTED] # the :accepted named_scope is duplicated named_scope :accepted, :conditions => ["memberships.status = ?", Membership::ACCEPTED] end class Group < ActiveRecord::Base has_many :memberships has_many :members, :through => :memberships end class Connection < ActiveRecord::Base belongs_to :person belongs_to :contact, :class_name => "Person", :foreign_key => "contact_id" end class Membership < ActiveRecord::Base belongs_to :person belongs_to :group end I'm trying to run something like person.contacts.accepted and group.members.accepted which are two different things. Shouldn't the named_scopes be in the Membership and Connection classes? One solution is to just call the two different named scope something different in the Person class or even to create separate associations (ie. has_many :accepted_members and has_many :accepted_contacts) but it seems hackish and in reality I have many more than just accepted (ie. banned members, ignored connections, pending, requested etc etc)

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• Rails I18n accepts_nested_attributes_for and error_messages_for

  - by Mike

  I've got two models class SurveyResponse has_many :answers, :class_name => SurveyResponseAnswer.name accepts_nested_attributes_for :answers end class SurveyResponseAnswer belongs_to :survey_response validates_presence_of :answer_text end In my nested form if validation fails I get this error displayed on the screen: "answers answer text can't be blank" I've customized my attribute names somewhat successfully using rails I18n. It doesn't behave exactly how I would expect though. The yml file below doesn't affect how the attribute name is printed in error_messages_for en: activerecord: models: survey_response: answers: "Response" But if from script/console I try SurveyResponse.human_attribute_name("answers") I get the expected result of "Response". What I'd like to do is have the validation error message say: "Response answer text can't be blank". Any ideas what I need to fix?

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• Rails 3.1. Cocoon link_to_add_association example needed

  - by BazZy

  pls show any example of using Cocoon's 'link_to_add_association' with html_options. https://github.com/nathanvda/cocoon Documentation says: html_options: extra html-options (see link_to) There are two extra options that allow to conrol the placement of the new link-data: data-association-insertion-node : the jquery selector of the node data-association-insertion-position : insert the new data before or after the given node. But i can not understand what to do, if i want insert partial just before my "add element" link. Not just after parent's div begin. This not gonna work: <%= link_to_add_association "add element", f, :production_years, :position = "after_all" %

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• Processing incoming emails on Heroku

  - by Jerry Cheung

  For my side project kwiqi, I use ActionMailer's 'receive' method to process incoming email messages for tracking my expenses. Heroku doesn't have a local mail server running that same code will not work. One solution I've thought of is to periodically hit a controller action that will pull messages from Gmail. Are there other solutions that are reasonable? Is anyone processing incoming emails in Heroku?

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• using jquery to disable a series of radio buttons on demand.

  - by holden

  I'm trying to accomplish something similar to Wikipedia's History history page, dynamically disabling radio buttons in a series. Ie... if #4 in group two is selected, then 1-4 of group one are disabled, etc. I know how to disable them individually or as a group, but I'm not sure how to do it in a series of say 1-4: Individually: $("#version_history input[id^=versions_2_3]:radio").attr('disabled',true); or group: $("#version_history input[id^=versions_2]:radio").attr('disabled',true); The inputs are named versions_1_X and versions_2_X, X being some number. 1..2..3.. etc.

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• Web Application Error Reporting

  - by Herr Kaleun

  Hello Friends, there was a web application, that you could configure so that over the api, your app could post the error logs into that application. it was a paid service and the free version allowed you to do like 1 report a minute. if any of you remember this service, please post it as an answer. thank you :)

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