ruby-on-rails

How do I override generic activerecord error messages in ruby-on-rails?

In my en.yml translation file, I have: activerecord: errors: template: header: one: "1 error prohibited this {{model}} from being saved" other: "{{count}} errors prohibited this {{model}} from being saved" When an activerecord/validation error occurs during logging into my application, the error me...

Main pricing and support for custom client pricing (Database Architecture ideas help - Rails)

Hi all, I have a personal project I'm planning and I came to a small hurdle. I want to have an item with price that will be the default for all clients/users. However, in my business I have some clients that are grandfathered in to some special pricing. In the case of these grandfathered in cases, I'll manually plug their special price...

What is the best practical way to add a major feature/service to an existing medium-sized Ruby on Rails project?

Hi there, I have an existing project written in Ruby on Rails. It is sort of backend solution for the upcoming major addition to the project. What I mean is it currently serves for the admins and it already has loads of features and actual Rails files in there. Now I am planning to add the new "Public" facing part of the App in Rails a...

Add save callback to a single ActiveRecord instance, is it possible?

Is it possible to add a callback to a single ActiveRecord instance? As a further constraint this is to go on a library so I don't have control over the class (except to monkey-patch it). This is more or less what I want to do: def do_something_creazy message = Message.new message.on_save_call :do_even_more_crazy_stuff end def do_e...

deploying rails3 apps with bundler and phusion passenger: .bundle dir not found

i am trying to deploy rails3 apps with the latest phusion passenger 2.2.11 and ruby-enterprise-1.8.7-2010.01. i am using bundler, but passenger seems to not be able to find the .bundle dir. error message: git://github.com/rails/rails.git (at master) is not checked out. Please run `bundle install` (Bundler::PathError) where do i insta...

Can rails test speed be increased?

Hi all, I'm a recent convert to TDD but as my codebase grows in size and complexity, I find myself waiting longer and longer periods for the framework to load every time I want to run a test. I am aware of rspec's spec_server but I'm using Test::Unit with shoulda. I tried Snailgun (http://github.com/candlerb/snailgun) but noticed very l...

Rails Model for Playlist that can contain tracks and albums using polymorphism

I struggle to find a model how to store a playlist with different type of items on it in Rails. Consider I have class Track end class Album has_many :tracks end class PlaylistItem belongs_to :playable belongs_to :playlist end class Playable belongs_to :playable, :polymorph => true end class Playlist has_many :playlist_i...

Rails Polymorphic Association with multiple associations on the same model

My question is essentially the same as this one: http://stackoverflow.com/questions/1168047/polymorphic-association-with-multiple-associations-on-the-same-model However, the proposed/accepted solution does not work, as illustrated by a commenter later. I have a Photo class that is used all over my app. A post can have a single photo. H...

Testing rails' autocomplete with cucumber

Hi! I need to test an autocomplete field with cucumber. How can I do that? I tried Scenario: Using Autocomplete Given I am on the home page And there are the following users: |id |name | |1 |foo | When I fill in "name" with "f" Then I should see "foo" But then it fails because expected the following eleme...

Rails way for querying join table in has_and_belongs_to_many

I have a user model and a role model with a has_and_belongs_to_many reliationship. The join table is roles_users (two columns - the PK of the user and the role) and has no corresponding model. I want to have a method that returns all users with a given role. In SQL that'd be something like SELECT u.id FROM role.r, roles_users ru WHERE ...

warning when using a named_scope as part of an anonymous scope

I have the following named scope: named_scope :find_all_that_match_tag, lambda { |tags| { :select => "articles.id, tags.name", :joins => :tags, :conditions => ["tags.name IN (?)",tags]} } It works fine like this in script/console Article.find_all_that_match_tag(["cooking"]) But if i use...

Python or Ruby for webbased Artificial Intelligence?

A new web application may require adding Artificial Intelligence (AI) in the future, e.g. using ProLog. I know it can be done from a Java environment, but I am wondering about the opportunities with modern web languages like Ruby or Python. The latter is considered to be "more scientific" (at least used in that environment), but using Go...

How to remove duplication from RSpec

context "answer is correct" do before(:each) do @answer = stub_model(Answer, :correct => true).as_new_record assigns[:answer] = @answer render "answers/summarize" end it "should display flashcard context properly" do response.should contain("Quiz") end it "should summarize results" do response.should contain("is correct") e...

Fetch third party data and store in rails application variable

Hi I need to do periodical background task fetching data from a weather site. How in rails can I fetch json from a remote url and store it on the server? Also, there doesn't seem to be any point in storing this in a db so how in rails can I store a variable available to all users? ...

DRYing up Rails Views with Nested Resources

What is your solution to the problem if you have a model that is both not-nested and nested, such as products: a "Product" can belong_to say an "Event", and a Product can also just be independent. This means I can have routes like this: map.resources :products # /products map.resources :events do |event| event.resources :product...

Creating items in groups in Rails

My product table is id type price location 1 chips $3 aisle3 I have a question with adding the products in groups. There is a quantity field(nonmodel) where the user can enter the quantity While adding a new product if the user enters: type: soda quantity: 3 Then there 3 records sho...

Rails app w/ 2.2.0 embedd how to use ruby 1.8 vice 1.9

Hello all, I have just downloaded an app that is based on Rail 2.2.0 which is included in the app. I have just upgraded to Ruby 1.9 and I still have Ruby 1.8 on my machine. Is there a way I can tell this app to use Ruby 1.8 vice 1.9? Would it be easier to decouple the app from Rails 2.2.0 and upgrade it to Rails 2.3.6? If changing the ...

Rails ActiveRecord- has_many through and belongs_to a related model

I have 3 models sites, user_favorites and users. Relevant relationships: class Site < ActiveRecord::Base has_many :users, :through => :user_favorites class UserFavorite < ActiveRecord::Base belongs_to :user, :counter_cache => true belongs_to :site end class User < ActiveRecord:Base has_many :user_favorites has_many :sites, ...

How to set up my belongs_to and has_many reference

Hi, I have an ExpenseType object that I have created with the following migration: class CreateExpenseTypes < ActiveRecord::Migration def self.up create_table :expense_types do |t| t.column :name, :string, :null => false t.timestamps end end I can see the table name is the pluralised expense_types. My questio...

Stack Overflow-like tag selector for Rails

I want to use tags for a model in my Rails application, and I'd like to have the same kind of tag selection mechanism that Stack Overflow has when asking a question. I.e. I type in 'rails' and it drops down a list of tags that include 'rails', and I can go on to add more tags from there. Is there a plugin that can do this? I'm comfortab...