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• Enforcing a Uniqueness Constraint in a Nested Form

  - by Euwyn

  I'm trying not to fight the defaults here and use Rails built-in support for nested attributes (from http://ryandaigle.com/articles/2009/2/1/what-s-new-in-edge-rails-nested-attributes). I'm labeling Things with Tags, and all works swell, and for each Thing I have a form with a nested field that creates a new Tag by a name. Trouble is, I need to make sure that each Tag has a unique name. Instead of creating a new Tag, if a user enters the name of one that already exists, I need to create the associate with that pre-existing Tag. How do I do this?

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• remote_function keeps adding authenticity token on GET requests

  - by jaycode

  Hi, I got the problem similar to this post here: https://rails.lighthouseapp.com/projects/8994/tickets/106-authenticity_token-appears-in-urls-after-ajax-get-request routes.rb map.namespace(:admin, :active_scaffold => true) do |admin| admin.resources :regions, :shallow => true do |region| region.resources :birds, :collection => {:search => :get} end end view <%= javascript_tag %Q( #{remote_function(:update => 'bird_search', :url => search_admin_region_birds_path(@region.id), :method => :get)} ) %> It displays url like: http://localhost:3000/admin/regions/7/birds/search?authenticity_token=F43BcQUM4z3bl7s21kLZQrqwGkuErF7C9jiNMKFTZTo%3D which should be: http://localhost:3000/admin/regions/7/birds/search Without this working my Ajax pagination won't work... help!

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• Rails / JBuilder - Entity array with has_many attributes

  - by seufagner

  I have two models, Person and Image and I want return an json array of Persons with your Images. But I dont want return all Image attributes, but produces a different result. Code below: class Person < ActiveRecord::Base has_many :images, as: :imageable validates :name, presence: true accepts_nested_attributes_for :images, :reject_if => lambda { |img| img['asset'].blank? } end class Image < ActiveRecord::Base belongs_to :imageable, polymorphic: true mount_uploader :asset, ImageUploader validates :asset, presence: true end zzz.jbuilder.json template json.persons(@rodas, :id, :name, :images) json produced: { "rodas": [{ "id": 4, "name": "John", "images": [ { "asset": { "url": "/uploads/image/xxxx.png" } }, { "asset": { "url": "/uploads/image/yyyyy.jpeg" } } ]}, { "id": 19, "name": "Mary", "images": [ { "asset": { "url": "/uploads/image/kkkkkkk.png" } } ] }] } I want something like: { "rodas": [ { "id": 4, "name": "John", "images": [ "/uploads/image/xxxx.png" , "/uploads/image/yyyy.jpeg" ] }, { "id": 10, "name": "Mary", "images": [ "/uploads/image/dddd.png" , "/uploads/image/xxxx.jpeg" ] } ]}

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• how to make a web-gallery with RoR?

  - by neuro

  hello, Im a newbie RoR kid, and I'm trying to make a web gallery app just like the onyx http://www.hulihanapplications.com/projects/onyx since it's outdated and i couldn't get it to work with my 2.3.8 rails' version. So, are plugins like paperclip or carrierwave any good for me to start with. Or should i take another route and writh the app from scratch. please provide me with good links regarding the subject. thank you in advance

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• split html text in 2 paragraphs

  - by Luca Romagnoli

  hi i have a html text like this: aaa dafjsld dslajfk òsal asfòljd <a href="ciao.com">aa aa</a> adsfsadfsadfs i want to split it in 2 paragraphs. but i don't want to generate this situation: <p>aaa dafjsld dslajfk òsal asfòljd <a href="ciao.com">aa</p><p> aa</a> adsfsadfsadfs</p> how can i check if the split involves any tags and avoid it? thanks

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• Fastest way to deploy rails apps with Passenger

  - by yuval

  I am working on a Dreamhost server with Rails 2.3.5. Every time I make changes to a site, I have to ssh into the site, remove all the files, upload a zip file containing all the new files for the site, unzip that file, migrate the database, and go. Something tells me there's a faster way to deploy rails apps. I am using mac Time Machine to keep track of different versions of my applications. I know git tracks files, but I don't really know how to work with it to deploy my applications, since passenger takes care of all the magic for me. What would be a faster way to deploy my applications (and avoid the downtime associated with my method when I delete all files on the server)? Thanks!

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• Mongoid Embeds_many won't save on nested form

  - by Brandon J McKay

  I've got an embeds_many association I'm trying to set up which I've done successfully before, but I'm trying to do it all in one nested form and I can't figure it out. Let's say we have a pocket model: class Pocket include Mongoid::Document field :title, type: String embeds_many :coins, cascade_callbacks: true end and a Coin Model: class Coin include Mongoid::Document field :name, type: String embedded_in :pocket end in my form for the pocket, I'm using: = f.fields_for @pocket.coins do |coin| = coin.text_field :name My controller is the default scaffolded controller. When I use the console, it saves fine and I can see the new pocket and coin I've created. But when I try to create or update a coin from the form, the pocket saves but the coin remains unchanged. What am I missing here?

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• Keeping dates in order when using date_select and discarding year in Rails?

  - by MikeH

  My app has users who have seasonal products. When a user selects a product, we allow him to also select the product's season. We accomplish this by letting him select a start date and an end date for each product. We're using date_select to generate two sets of drop-downs: one for the start date and one for the end date. Including years doesn't make sense for our model. So we're using the option: discard_year => true To explain our problem, consider that our products are apples. Vendor X carries apples every year from September to January. Years are irrelevant here, and that's why we're using discard_year => true. However, while the specific years are irrelevant, the relative point in time from the start date to the end date is relevant. This is where our problem arises. When you use discard_year => true, Rails does set a year in the database, it just doesn't appear in the views. Rails sets all the years to 0001 in our app. Going back to our apple example, this means that the database now thinks the user has selected September 0001 to January 0001. This is a problem for us for a number of reasons. To solve this, the logic that I need to implement is the following: - If season_start month/date is before season_end month/date, then standard Rails approach is fine. - But, if season_start month/date is AFTER season_end month/date, then I need to dynamically update the database field such that the year for season_end is equal to the year for season_start + 1. My best guess is that I would create a custom method that runs as an after_save or after_update in my products model. But I'm not really sure how to do this. Ideas? Anybody ever had this issue? Thanks!

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• format.js generate 406 Not Acceptable error

  - by Denis

  Hello, following code generate a 406 Not Acceptable error. What can be wrong with my code? def remote_create @photo = Photo.new(params[:photo]) respond_to do |format| if @photo.save # add @photo's thumbnail to last import tag format.js { render :update do |page| page.insert_html :bottom, 'polaroids' , :partial => 'polaroid', :locals => {:photo => @photo} end } else format.html end end end Started POST "/photos/remote_create" for 127.0.0.1 at 2010-03-14 14:02:08 Processing by PhotosController#remote_create as HTML Parameters: {"photo"=>{"photo"=>#<File:/var/folders/BT/BTpdsWBkF6myaI-sl3+1NU+++TI/-Tmp-/RackMultipart20100314-285-1y9eq1x-0>, "name"=>"4204497503_a0c43c561d.jpg"}} SQL (0.6ms) INSERT INTO "photos" ("created_at", "filename", "height", "name", "photo_content_type", "photo_file_name", "photo_file_size", "photo_updated_at", "size", "updated_at", "width") VALUES ('2010-03-14 13:02:08.449499', NULL, NULL, '4204497503_a0c43c561d.jpg', 'application/octet-stream', '4204497503_a0c43c561d.jpg', 136710, '2010-03-14 13:02:08.446370', NULL, '2010-03-14 13:02:08.449499', NULL) [paperclip] Saving attachments. [paperclip] saving /Users/denisjacquemin/Documents/code/projects/photos/public/system/photos/224/original/4204497503_a0c43c561d.jpg Completed in 101ms with 406

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• Rails, search item in different model?

  - by Danny McClelland

  Hi Everyone, I have a kase model which I am using a simple search form in. The problem I am having is some kases are linked to companies through a company model, and people through a people model. At the moment my search (in Kase model) looks like this: # SEARCH FACILITY def self.search(search) search_condition = "%" + search + "%" find(:all, :conditions => ['jobno LIKE ? OR casesubject LIKE ? OR transport LIKE ? OR goods LIKE ? OR comments LIKE ? OR invoicenumber LIKE ? OR netamount LIKE ? OR clientref LIKE ? OR kase_status LIKE ? OR lyingatlocationaddresscity LIKE ?', search_condition, search_condition, search_condition, search_condition, search_condition, search_condition, search_condition, search_condition, search_condition, search_condition]) end What I am trying to work out, is what condition can I add to allow a search by Company or Person to show the cases they are linked to. @kase.company.companyname and company.companyname don't work :( Is this possible? Thanks, Danny

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• Rails testing authlogic

  - by pepernik

  I just started using tests. I try to test the login like this require 'test_helper' class UserFlowsTest < ActionController::IntegrationTest fixtures :all # Replace this with your real tests. test "login and browse" do https! get "/users/new" assert_response :success post "/user_sessions", :email => '[email protected]', :password => 'aaaa' follow_redirect! assert_equal root_path, path end end I use authlogic gem in my rails app. What is wrong with this test? It breaks at 'follow_redirect!' saying it is not a redirection but login through a browser works. Thx!

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• How do I use a custom cookie session serializer in Rack?

  - by Damien Wilson

  Hello SO. I'm currently integrating Warden into a new Rack application I'm building. I'd like to implement a recent patch to Rack that allows me to specify how sessions are serialized; specifically, I'd like to use Rack::Session::Cookie::Identity as the session processor. Unfortunately, the documentation is a little unclear as to what syntax I should use to configure Rack::Session::Cookie in my rackup file, can anyone here tell me what I'm doing wrong? config.ru require 'my_sinatra_app' app = self use Rack::Session::Cookie.new(app, Rack::Session::Cookie::Identity.new), {:key => "auth_token"} use Warden::Manager do |warden| # Must come AFTER Rack::Session warden.default_strategies :password warden.failure_app Jelli::Auth.run! end run MySinatraApp error message from thin !! Unexpected error while processing request: undefined method `new' for #<Rack::Session::Cookie:0x00000110124128> PS: I'm using bundler to manage my gem dependencies and I've likewise included rack's master branch as the desired version. Update: As suggested in the comments below, I have read the documentation; sadly the suggested syntax in the docs is not working. Update: Still no luck on my end; offering up a bounty to whoever can help me figure this out.

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• disable password confirmation during registration when using devise

  - by siulamvictor

  I am using Devise for Rails. In the default registration process, Devise require users to type the password twice for validation. How can I disable it? Thanks all. :)

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• rails, activerecord callbacks not saving

  - by Joseph Silvashy

  I have a model with a callback that runs after_update: after_update :set_state protected def set_state if self.valid? self.state = 'complete' else self.state = 'in_progress' end end But it doesn't actually save those values, why not? Regardless of if the model is valid or not it won't even write anything, even if i remove the if self.valid? condition, I can't seem to save the state. Um, this might sound dumb, do I need to run save on it?

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• Rails - Format number as currency format in the Getter

  - by daemonsy

  I am making a simple retail commerce solution, where there are prices in a few different models. These prices contribute to a total price. Imagine paying $0.30 more for selecting a topping for your yogurt. When I set the price field to t.decimal :price, precision:8, scale:2 The database stores 6.50 as 6.5. I know in the standard rails way, you call number_to_currency(price) to get the formatted value in the Views. I need to programmatically call the price field as well formatted string, i.e. $6.50 a few places that are not directly part of the View. Also, my needs are simple (no currency conversion etc), I prefer to have the price formatted universally in the model without repeated calling number_to_currency in views. Is there a good way I can modify my getter for price such that it always returns two decimal place with a dollar sign, i.e. $6.50 when it's called? Thanks in advance.

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• Problem with Active Record

  - by kshchepelin

  Hello everyone. Lets assume we have a User model. And user can plan some activities. The number of types of activities is about 50. All activities have common properties, such as start_time, end_time, user_id, etc. But each of them has some unique properties. Now we have each activity living in its own table in DB. And thats why we have such terrible sql queries like SELECT * FROM `first_activities_table` WHERE (`first_activity`.`id` IN (17,18)) SELECT * FROM `second_activities_table` WHERE (`second_activity`.`id` = 17) ..... SELECT * FROM `n_activities_table` WHERE (`n_activity`.`id` = 44) About 50 queries. That's terrible. There are different ways to solve this. Choose the activity type with the biggest number of properties, create the table 'Activities' and have STI model. But this way we must name our columns in uncomfortable way and often the record in that table would have some NULL fields. Also STI model, but having columns, common for all of activity types and some blob column with serialized properties. But we have to do some search on activities - there can be a problem. And serialization is quite slow. Please help me dealing with this. Maybe my problem has quite different solution that will fit my needs. Thanks for help.

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• file_field is not sticky in my Rails form

  - by Tony

  I have a pretty standard Rails form: <div> <h1>Create a New Listing</h1> <%- form_for @listing, :html => {:multipart => true} do |f| -%> <div><%= f.label :title, "Title:"%> <%= f.text_field :title %></div> <div> <%= f.label :image, "Image:" %> <%= f.file_field :image </div> <div> <%= f.label :sound, "Sound Clip:"%> <%= f.file_field :sound %><br /> </div> <div class="submit"><%= f.submit 'Post Listing' %></div> <%- end -%> </div> When a user chooses a file, but the form fails for validation purposes, he must always re-select the file. It is not sticky. Any suggestion on how to fix this? Thanks!

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• Ajax Push Engine

  - by gkrdvl

  Hi all, are there anyone hear about APE (Ajax Push Engine) before ? I'm building Rails application and trying to create group chat with this APE realtime engine, the problem is how to make Rails communicate with APE Server ? Are there any tutorial or reference on working APE with Rails ?

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• Where to put constants in Rails

  - by Sam

  I have a few constants which are arrays that I don't want to create db's for but I don't know where to store the constants without getting errors. For example CONTAINER_SIZES = [["20 foot"],["40 foot"]] Where can I store this so all models and controller have access to this?

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• Are there any GOOD Chef, Chef-Server and Chef-Client tutorials out there?

  - by btelles

  Hi there, Chef from Opscode seems to be really useful for configuring servers and such, but trying to follow their documentation is a little difficult. Some terms are defined after they are used, and definitions sometimes reference new terms that you haven't yet encountered. Anyone know of any GOOD tutorials/walk-throughs for getting a good understanding of Chef, Chef-Server and Chef-Client? I remember seeing one video presentation online, but it barely scratched the surface.

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• protect_from_forgery & Unobtrusive Javascript

  - by Matt Grande

  Hi all, I have some javascript making an ajax call in my Rails site: $.ajax({type: "PUT", url: url, data: { dummy: data }, complete: function(data) {}}); When Rails gets it, it throws back an ActionController::InvalidAuthenticityToken Error. I'd like to keep the protect_from_forgery stuff in there, if possible... But I'm at a loss for how can I pass the auth token from a javascript file? Can anyone help me out?

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• DRb connecting to linux client from windows

  - by Christopher Dancy

  I have a few DRb services running on different windows machines and they can all connect and talk with each other just fine. When I put these DRb services on Linux machines and try to connect from windows nothing happens and I get a DRB:ConnError ... the service on Linux is never touched. So I did a netstat on the linux box and the service(port) were not listed anywhere even though the program is clearly running. Is there someting that I'm missing when talking to DRb services on Linux from a windows machine?

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• HAML-like syntax for non-HTML documents?

  - by Peter

  I love using HAML for HTML documents. It has clean syntax that's much more attractive than ERB. It works perfectly for HTML documents. What about for non-HTML? Such as, for example, an email or text document with certain automatically-substituted components? I've been falling back to ERB, but don't like the heavy syntax compared to HAML. Is there any way to use HAML for ordinary documents without having divs and html elements appear when % and . start a line? Or is there some alternative to both HAML and ERB that I should investigate?

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• Rails3: ActiveRecord model relationship with YAML file

  - by moshimoshi

  Hi, I have an ActiveRecord model Group and a YAML table stored in config/users.yaml just like: - {login: titi, password: 123456, group_id: 2} - {login: toto, password: 987654, group_id: 7} And I would like to link them by a sexy way. Can you help me? Many thanks for any help!

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• How to model has_many with polymorphism?

  - by Daniel Abrahamsson

  I've run into a situation that I am not quite sure how to model. Suppose I have a User class, and a user has many services. However, these services are quite different, for example a MailService and a BackupService, so single table inheritance won't do. Instead, I am thinking of using polymorphic associations together with an abstract base class: class User < ActiveRecord::Base has_many :services end class Service < ActiveRecord::Base validates_presence_of :user_id, :implementation_id, :implementation_type belongs_to :user belongs_to :implementation, :polymorphic = true delegate :common_service_method, :name, :to => :implementation end #Base class for service implementations class ServiceImplementation < ActiveRecord::Base validates_presence_of :user_id, :on => :create has_one :service, :as => :implementation has_one :user, :through => :service after_create :create_service_record #Tell Rails this class does not use a table. def self.abstract_class? true end #Default name implementation. def name self.class.name end protected #Sets up a service object def create_service_record service = Service.new(:user_id => user_id) service.implementation = self service.save! end end class MailService < ServiceImplementation #validations, etc... def common_service_method puts "MailService implementation of common service method" end end #Example usage MailService.create(..., :user_id => user.id) BackupService.create(...., :user_id => user.id) user.services.each do |s| puts "#{user.name} is using #{s.name}" end #Daniel is using MailService, Daniel is using BackupService So, is this the best solution? Or even a good one? How have you solved this kind of problem?

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