tabs on rails - Page 239

Understanding the Unix file system and ruby installs without Sudo

- by JZ

I'm trying to comprehend the Unix file system on my OSX. I'm following wikipedia Filesystem Hierarchy Standard. I understand when I install ruby gems I must use the command sudo gem install but if I omit sudo, problems may occur. Where are gems installed within the file system when I omit sudo? How can I delete these gems? A Fun side question: When I enter cd ~/.gem my terminal is directed to .gem user$, When I enter cd ~/ and list folders using the ls command I can't find a .gem folder. Where is the .gem folder? How does this fit into the Filesystem?

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turn a ruby hash into html list

- by JAlberto

I'm trying to parse a yaml file like this: a: a1: a2: b: b1: b11: b2: i get a hash like this: {"a"=>{"a1"=>nil, "a2"=>nil}, "b"=>{"b1"=>{"b11"=>nil}, "b2"=>nil}} and i want to turn it to a list: %ul %li a %ul %li a1 %li a2 %li b %ul %li b1 %ul %li b11 %li b2 I'm trying to search the most efficent way doesn't matter how deep is the hash

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Is this type of calculation to be put in Model or Controller?

- by Hadi

i have Product and SalesOrder model (to simplify, 1 sales_order only for 1 product) Product has_many SalesOrder SalesOrder belongs_to Product pa = Product A #2000 so1 = SalesOrder 1 order product A #1000, date:yesterday so2 = SalesOrder 2 order product A #999, date:yesterday so3 = SalesOrder 3 order product A #1000, date:now Based on the date, pa.find_sales_orders_that_can_be_delivered will give: SalesOrder 1 order product A #1000, date:yesterday SalesOrder 2 order product A #999, date:yesterday SalesOrder 3 order product A #1, date:now <-- the newest The question is: is find_sales_orders_that_can_be_delivered should be in the Model? i can do it in controller. and the general question is: what goes in Model and what goes in Controller. Thank you

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validates_uniqueness_of with HABTM relationship

- by jeffshantz

I've got a HABTM relationship between two models: Publication and Author. I want to ensure that one cannot create a publication with the same title, year, and author list. However, if I try something like this: class Publication < ActiveRecord::Base validates_uniqueness_of :title, :scope => [:year, :authors] end This obviously won't work since there is no authors column. Can this be done with validates_uniqueness_of, or do I need a custom validator? Thank you.

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Modifying records in my migration throws an authlogic error

- by nfm

I'm adding some columns to one of my database tables, and then populating those columns: def self.up add_column :contacts, :business_id, :integer add_column :contacts, :business_type, :string Contact.reset_column_information Contact.all.each do |contact| contact.update_attributes(:business_id => contact.client_id, :business_type => 'Client') end remove_column :contacts, :client_id end The line contact.update_attributes is causing the following Authlogic error: You must activate the Authlogic::Session::Base.controller with a controller object before creating objects I have no idea what is going on here - I'm not using a controller method to modify each row in the table. Nor am I creating new objects. The error doesn't occur if the contacts table is empty. I've had a google and it seems like this error can occur when you run your controller tests, and is fixed by adding before_filter :activate_authlogic to them, but this doesn't seem relevant in my case. Any ideas? I'm stumped.

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Within a category, "Seach all posts" checkbox, how to?

- by benoror

Hi, I have set up my routes so I can search all posts with: /posts/search/foobar or search inside a category /posts/category/1/search/foobar It works pretty well, when someone is browsing an specific category it does search just posts that belongs to that category. When inside a category, I want to place a checkbox to "Search all the posts" My search form: <% form_for :posts, :url => {:controller => :posts, :action => :index} do |f| %> Search: <%= f.text_field :search %> <% if params[:cat] %> <%= f.check_box :ignore_cat, '1', false %> Search all the posts? <% end %> <%= f.submit 'Go' %> <% end %> How can I force to change the route?

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How to remove duplication from RSpec

- by Asa

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") end end context "answer is incorrect" do before(:each) do @answer = stub_model(Answer, :correct => false).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 incorrect") end end How do I avoid repeating the following block within both of the above contexts? it "should display flashcard context properly" do response.should contain("Quiz") end

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Image rendering on browser or temporary images?

- by Muralha

I'm trying to make a statistics page where it will show several data and charts. The charts need to be pictures so that the user can save it/drag-and-drop to his/her personal reports. I'm using Gruff Graphs for Ruby to produce the charts but I don't know the best way to display the results safe and protected. Some of my ideas/tries are: save the chart to a file (jpg, png)? problem: data is available to anyone (don't have access to cron, to delete data from time to time) render in the browser (has to work on IE)? Use javascript (Raphaël—JavaScript Library) or Google API and output a PDF report (need plugin or gem, right)? use send_data? i've tried to output other way than inline, because I needs to show other data, is it possible? Thanks for any help.

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AssociationTypeMismatch with Expected Type on Nested Model Forms

- by Craig Walker

I'm getting this exception when doing a nested model form: ActiveRecord::AssociationTypeMismatch in RecipesController#update Ingredient(#35624480) expected, got Ingredient(#34767560) The models involved are Recipe and Ingredient. Recipe has_many and accepts_nested_attributes_for :ingredients, which belongs_to :recipe. I get this exception when attempting to _destroy (=1) one of the preexisting Ingredients on a nested Ingredient form for the Recipe Edit/Update. This makes very little sense, mostly because the association types are as expected (by the exception's own admission). What makes even less sense is that it works just fine in a functional test. Any ideas what might be causing this, or what I should be looking for?

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Monkeypatch a model in a rake task to use a method provided by a plugin?

- by gduquesnay.mp

During some recent refactoring we changed how our user avatars are stored not realizing that once deployed it would affect all the existing users. So now I'm trying to write a rake task to fix this by doing something like this. namespace :fix do desc "Create associated ImageAttachment using data in the Users photo fields" task :user_avatars => :environment do class User # Paperclip has_attached_file :photo ... <paperclip stuff, styles etc> end User.all.each do |user| i = ImageAttachment.new i.photo_url = user.photo.url user.image_attachments << i end end end When I try running that though I'm getting undefined method `has_attached_file' for User:Class I'm able to do this in script/console but it seems like it can't find the paperclip plugin's methods from a rake task.

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Deleting a resource in a Cucumber (Capybara) step doesn't work

- by Josiah Kiehl

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Git push origin master

- by user306472

I posted this question early yesterday, but the thread seems to have died out. For reference, see http://stackoverflow.com/questions/2619117/git-push-origin-master . Here's the low-down: I'm new to git. I just set up an account with github and I followed all their instructions flawlessly until I got to the last command of git push origin master Upon entering this command, I get the error message "fatal: No path specified. See 'man git-pull' for valid url syntax." If I type in git origin show the output I see is origin. If I type in git remote -n show the output is * remote origin URL: [email protected]: HEAD branch: (not queried) Local ref configured for 'git push' (status not queried): (matching) pushes to (matching) Please help me get to the bottom of this.

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Factory Girl Association

- by David Lyod

I have an association of a Admin - Account in factory girl I now wish to associate a second user with the same account but am unable to do so. I build my Admin-Account association like this u.account { |account| account.association(:account)} This works fine and creates the Account and Admin association. Im looking for a way to setup a second user who's account also points to the record created in the Admin factory association. I currently just build the second user as such @user = Factory.build(:seconduser) @user.account = Account.first @user.save! Which works but seems somewhat hacky .

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Remove a tag type from the view (involves alphabetical pagination)

- by user284194

I have an index view that lists all of the tags for my Entry and Message models. I would like to only show the tags for Entries in this view. I'm using acts-as-taggable-on. Tags Controller: def index @letter = params[:letter].blank? ? 'a' : params[:letter] @tagged_entries = Tagging.find_all_by_taggable_type('Entry').map(&:taggable) @title = "Tags" if params[:letter] == '#' @data = Tag.find(@tagged_entries, :conditions => ["name REGEXP ?", "^[^a-z]"], :order => 'name', :select => "id, name") else @data = Tag.find(@tagged_entries, :conditions => ["name LIKE ?", "#{params[:letter]}%"], :order => 'name', :select => "id, name") end respond_to do |format| flash[:notice] = 'We are currently in Beta. You may experience errors.' format.html end end tags#index: <% @data.each do |t| %> <div class="tag"><%= link_to t.name.titleize, tag_path(t) %></div> <% end %> I want to show only the taggable type 'Entry' in the view. Any ideas? Thank you for reading my question. SECOND EDIT: Tags Controller: def index @title = "Tags" @letter = params[:letter].blank? ? 'a' : params[:letter] @taggings = Tagging.find_all_by_taggable_type('Entry', :include => [:tag, :taggable]) @tags = @taggings.map(&:tag).sort_by(&:name).uniq @tagged_entries = @taggings.map(&:taggable)#.sort_by(&:id)#or whatever if params[:letter] == '#' @data = Tag.find(@tags, :conditions => ["name REGEXP ?", "^[^a-z]"], :order => 'name', :select => "id, name") else @data = Tag.find(@tags, :conditions => ["name LIKE ?", "#{params[:letter]}%"], :order => 'name', :select => "id, name") end respond_to do |format| format.html end end tags#index: <% @data.each do |t| %> <div class="tag"><%= link_to t.name.titleize, tag_path(t) %></div> <% end %> Max Williams' code works except when I click on my alphabetical pagination links. The error I'm getting [after I clicked on the G link of the alphabetical pagination] reads: Couldn't find all Tags with IDs (77,130,115,...) AND (name LIKE 'G%') (found 9 results, but was looking for 129) Can anyone point me in the right direction?

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Cake PHP Routing issue

- by Smickie

Hi, I need to do some special routing in cake, but can't for the life of me figure it out. I have a shop controller at /shop, the format of the url will be: /shop/:category/:sub_category/:product_slug In the routing I need to send each part of the url to a different action, for example if the url was just /shop/cakes it would go to the category action of shop. However if the url was /shop/cakes/macaroons or /shop/cakes/fairy it would go to the sub category action on the shop controller. And the the same again for /shop/cakes/macaroons/pistachio would go to the product action on the shop controller. How would I go about this in the routing? Something starting with Router::connect('/shop/:category/:sub_category/:product_slug' ... Or am I way off the mark? Thanks.

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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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Passing an instance variable through RJS?

- by Elliot

Hey guys here is my code (roughly): books.html.erb <% @books.each do |book| %> <% @bookid = book.id %> <div id="enter_stuff"> <%= render "input", :bookid => @bookid %> </div> <%end%> _input.html.erb <% @book = Book.find_by_id(@bookid) %> <strong>your book is: <%=h @book.name %></strong> create.rjs page.replace_html :enter_stuff, :partial => 'input', :object => @bookid The problem here is that only create.js doesn't seem to work (though, if instead of passing the partial I passed "..." it does work, so I know its that there are instance variables in the partial that aren't being reset. Any ideas?) So the final question, is how do I pass an instance variable to a partial through the create.rjs file? p.s. I know I will have duplicate div IDs, I'm not worrying about that for now though. Best, Elliot

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Ruby using yield and got this problem: Cannot yield from a Proc type filter.

- by Totty

Im using like this: def child_render super_render { print GridModule.new.render } end def super_render @yield_value = yield end and got: Cannot yield from a Proc type filter. The Proc must take two arguments and execute #call on the second argument.

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Incorporating Devise Authentication into an already existing user structure?

- by Kevin

I have a fully functional authentication system with a user table that has over fifty columns. It's simple but it does hash encryption with salt, uses email instead of usernames, and has two separate kinds of users with an admin as well. I'm looking to incorporate Devise authentication into my application to beef up the extra parts like email validation, forgetting passwords, remember me tokens, etc... I just wanted to see if anyone has any advice or problems they've encountered when incorporating Devise into an already existing user structure. The essential fields in my user model are: t.string :first_name, :null => false t.string :last_name, :null => false t.string :email, :null => false t.string :hashed_password t.string :salt t.boolean :is_userA, :default => false t.boolean :is_userB, :default => false t.boolean :is_admin, :default => false t.boolean :active, :default => true t.timestamps For reference sake, here's the Devise fields from the migration: t.database_authenticatable :null => false t.confirmable t.recoverable t.rememberable t.trackable That eventually turn into these actual fields in the schema: t.string "email", :default => "", :null => false t.string "encrypted_password", :limit => 128, :default => "", :null => false t.string "password_salt", :default => "", :null => false t.string "confirmation_token" t.datetime "confirmed_at" t.datetime "confirmation_sent_at" t.string "reset_password_token" t.string "remember_token" t.datetime "remember_created_at" t.integer "sign_in_count", :default => 0 t.datetime "current_sign_in_at" t.datetime "last_sign_in_at" t.string "current_sign_in_ip" t.string "last_sign_in_ip" t.datetime "created_at" t.datetime "updated_at" What do you guys recommend? Do I just remove email, hashed_password, and salt from my migration and put in the 5 Devise migration fields and everything will be OK or do I need to do something else?

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Ruby: Alter class static method in a code block

- by Phuong Nguy?n

Given the Thread class with it current method. Now inside a test, I want to do this: def test_alter_current_thread Thread.current = a_stubbed_method # do something that involve the work of Thread.current Thread.current = default_thread_current end Basically, I want to alter the method of a class inside a test method and recover it after that. I know it sound complex for another language, like Java & C# (in Java, only powerful mock framework can do it). But it's ruby and I hope such nasty stuff would be available

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Attachment_fu file saving problem

- by Anand

Attachment_fu plugin is kind of old, but I have to modify an old app and I can't use another plugin like paperclip etc. So here's the code without further ado Submissions table structure --------------------------- | content_type | varchar(255) | YES | | NULL | filename | varchar(255) | YES | | NULL app/models/submission.rb ------------------------ has_attachment :storage => :file_system, :path_prefix => 'public/submissions', :max_size => 2.megabytes, :content_type => ['application/pdf', 'application/msword', 'text/plain'] app/models/user.rb ------------------ has_one :submission, :dependent => :destroy app/views/user/some_action.html.erb ----------------------------------- <% form_for :user, :url => { :action => "some_action" }, :html => {:multipart => true} do |f| %> .... <%= file_field_tag "submission[uploaded_data]" %> <%end%> app/controllers/user_controller.rb ---------------------------------- @user = User.find_user(session[:user_id]) @submission = @user.submission if request.post? @submission.uploaded_data = params[:submission][:uploaded_data] end When the form is submitted, the database fields "content_type" and "filename" get updated and display the correct values, but the file does not appear in public/submissions/ directory. I have checked the permissions on the submissions directory. What am I missing? Many Thanks

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aws-s3 can't find xml-simple, but in gem list

- by Dan Donaldson

I'm transitioning to heroku, and need to have AWS-s3 connections to deal with a variety of graphics. I've installed the aws-s3 gem, but one of its dependencies is not being found: xml-simple. My belief is that this is a standard part of RoR, and it is in the gem list. When I deploy to heroku, all is fine, but on my development server, it isn't being found when the code uses it to check the existence of a graphic. It works fine from the console, using s3sh. I'm not quite sure why this is -- what do I need to check? Using OS X 10.6, on a 64 bit machine -- can this be part of it?

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howto design an invite feature feature?

- by fenec

hello i am trying to implement a feature in my facebook application that would give 100 point to someone who would send 10 invitations. however i want a limit that feature for each user to use it only 10 times a day. how should i design my feature to do what i want

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Ruby assertions and disabled inputs

- by brad

Does anyone know how to assert that a checkbox or input is disabled? I can't find anything to indicated that this is supported I'm writing cucumber tests with webrat and test/unit. I'd like to have a step that is able to assert_disabled :some_checkbox || assert_disabled :some_input. Or some way that I can check a property of the checkbox.

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Problems installing rdoc, irb, bluecloth, chronic on fedora 12

- by Vineeth

Hello, What do these errors mean? [root@localhost config]# gem install bluecloth Building native extensions. This could take a while... ERROR: Error installing bluecloth: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb can't find header files for ruby. Gem files will remain installed in /usr/lib64/ruby/gems/1.8/gems/bluecloth-2.0.7 for inspection. Results logged to /usr/lib64/ruby/gems/1.8/gems/bluecloth-2.0.7/ext/gem_make.out [root@localhost config]# And this [root@localhost config]# gem install chronic Successfully installed json_pure-1.4.3 Successfully installed rubyforge-2.0.4 Successfully installed hoe-2.6.0 Successfully installed chronic-0.2.3 4 gems installed /usr/lib64/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ruby_lex.rb:67: warning: parenthesize argument(s) for future version ERROR: While executing gem ... (Gem::DocumentError) ERROR: RDoc documentation generator not installed: no such file to load -- irb/slex [root@localhost config]# I have installed rdocs using "yum install ruby-rdocs". But I don't understand what this error means

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- by JZ

- by JAlberto

- by Hadi

- by jeffshantz

- by nfm

- by benoror

- by Asa

- by Muralha

- by Craig Walker

- by gduquesnay.mp

- by Josiah Kiehl

- by user306472

- by David Lyod

- by user284194

- by Smickie

- by Abid

- by Elliot

- by Totty

- by Kevin

- by Phuong Nguy?n

- by Anand

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