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  • Rails how to return a list of answers with a specific question_id

    - by mytwocentsisworthtwocents
    Let's say I have two Models, Answers and Questions (there are others, but irrelevant to the question). The models are as follows: Answer.rb class Answer < ActiveRecord::Base attr_accessible :description, :question_id has_one :question, :through => :user, :dependent => :destroy validates :description, :presence => true end Question.rb class Question < ActiveRecord::Base attr_accessible :budget, :description, :headline, :user_id, :updated_at, :created_at belongs_to :user has_many :answers validates :headline, :description, :user_id, :presence => true end I'd like to display on a page a list of all answers associated with a question, and only those questions. I got this far. I believe this variable finds all the questions in the database by the question_id (foreign key): @findanswers = Answer.all(params[:question_id]) And this one grabs the the id of the current question (this code will reside as an ERB on the page where the current question is located): @questionshow = Question.find(params[:id]) And now I'm stuck. How do I put the two together so that I list all the answers with the current question id?

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  • To check the default select value tag!

    - by Small Wolf
    I have a question.Here is the code! f.select(:departments,Department.all.collect{|c|[c.name,c.id]},{},:size=>10,:multiple => ture) class Emergency has many :departments end the html source like this: <select id="emergency_departments" multiple="multiple" name="emergency[departments][]" size="10"><option value ="">""</option>....</select> now I want to get the default selected tag , who can tell me how ?

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  • Rails: Creating subfolders in model?

    - by keruilin
    I'm going to have a ton of subclasses, so want to organize them under a subfolder called stream. I added the following line to the environment.rb so that all classes in the subfolder would be loaded: Rails::Initializer.run do |config| ... config.load_paths += Dir["#{RAILS_ROOT}/app/models/*"].find_all { |f| File.stat(f).directory? } ... end I thought this would solve the issue in which by convention the model class is namespaced into an according module. However, when I try to call one of the classes called stream in the stream folder, I get the following error: NoMethodError: undefined method `new' for Stream:Module from (irb):28 from /usr/local/bin/irb:12:in `<main>' Here's the model for the parent and one child: class Stream end class EventStream < Stream end Any idea what the issue is?

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  • how do I create a custom route in rails where I pass the id of an existing Model?

    - by Angela
    I created the following route: map.todo "todo/today", :controller => "todo", :action => "show_date" Originally, the 'show_date' action and associated view would display all the activities associated for that day for all the Campaigns. This ended up being very slow on the database...it would generate roughly 30 records but was still slow. So, I'm thinking of creating a partial that would first list the campaigns separately. If someone clicked on a link associated with campaign_id = 1, I want it to go to the following route: todo/today/campaign/1 Then I would like to know how to know that the '1' is the campaign_id in the controller and then just do its thing. The reason I want a distinct URL is so that I can cache this list. I have to keep going back to this and it's slow. NOTE: It's possibly the problem actually is that I've written the queries in a slow way and sqlite isn't representative of how it will be in production, in which case this work-around is unnecessary, but right now, I need a way to get back to the whole list quickly.

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  • Headers set on embedding

    - by mschoening
    Lets say I have a URL (http://www.example.com/something). Is the following scenario somehow possible? A) The user visits the URL directly and a standard page with markup, js, etc. is shown. B) The user embeds the same URL in an image tag and the URL is served only as an image.

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  • "rake test" doesn't load fixtures?

    - by Pavel K.
    when i run rake test --trace here's what happens ** Invoke test (first_time) ** Execute test ** Invoke test:units (first_time) ** Invoke db:test:prepare (first_time) ** Invoke db:abort_if_pending_migrations (first_time) ** Invoke environment (first_time) ** Execute environment ** Execute db:abort_if_pending_migrations ** Execute db:test:prepare ** Invoke db:test:load (first_time) ** Invoke db:test:purge (first_time) ** Invoke environment ** Execute db:test:purge ** Execute db:test:load ** Invoke db:schema:load (first_time) ** Invoke environment ** Execute db:schema:load ** Execute test:units /usr/bin/ruby1.8 -I"lib:test".... (and after that fails because there's no fixtures loaded) why doesn't it load fixtures (i thought that would be default behaviour) and how do i make it load fixtures before executing tests??? p.s. my test/test_helper.rb content is: ENV["RAILS_ENV"] = "test" require File.expand_path(File.dirname(__FILE__) + "/../config/environment") require 'test_help' class ActiveSupport::TestCase self.use_transactional_fixtures = true self.use_instantiated_fixtures = false fixtures :all end (rails 2.3.4)

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  • What's causing "NoMethodError: undefined method `include?' for nil:NilClass"

    - by NudeCanalTroll
    I have a Book model in my Rails application, with various properties (aka columns in the book db table). One of these properties is "ranking". Recently, may app has started to throw NoMethodError: undefined method 'include?' for nil:NilClass for the following code: def some_method(book, another_arg) return book.ranking unless book.ranking.blank? ... end However, it's not consistent. The vast majority of the time, accessing book.ranking works -- the error is thrown maybe 2-4% of the time. If I change the code to book[:ranking] or book['ranking'] instead of book.ranking, it works 100% of the time. Any ideas?

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  • How does Facebook codes their Cropping tool?

    - by Trip
    I ask this because I am currently trying to work out my own technique, and there are huge strategic hangups for the entire site when your begin this. Of them are: Using jCrop and rMagick, it takes up a huge amount of processing ( to which I have backgrounded ). Because I have it backgrounded, I must by ajax develop a feature that auto-updates every five seconds to check when the backgrounding is done. Has anyone accomplished this with their sites? If so, what are some creative techniques you came across to keep the processing streamline, and the users happy?

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  • How to avoid links to map.root getting shortened?

    - by Guy C
    I have a Reports controller and various reports: http://localhost/reports/main/this_month http://localhost/reports/main/last_month http://localhost/reports/main/this_year I wanted http://localhost to default to http://localhost/reports/main/this_month. That is easy enough using map.root in my routes.rb. However when I do this any links to http://localhost/reports/main/this_month are now shortened to just http://localhost. I want the links to stay full

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  • Constants in Model and View with select option and show view

    - by caplod
    i have a some values ,that i use in my model as constants. class Animal < ActiveRecord::Base LEGS = {:vierbeiner => 4, :zweibeiner => 2 } end in the form (formtastic) for the collection i use: <%= f.input :legs, :as => :select, :collection => Animal::LEGS => but how do i format the show view so instead showing me the number , the key of the hash? in show view i have: <p> <strong>Legs:</strong> <%=h @animal.legs %> </p>

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  • Rails 3: Link_to :remote => true with JQuery?

    - by Derek
    Question update: I have figured out that importing JQuery (even without using it at all) is causing :remote => true to not work properly. I get the following error in the Chrome console: Uncaught TypeError: Object [object Object] has no method 'dispatchEvent' (prototype.js:5653) And when the link is clicked, it throws the same error again before redirecting. Responder.erb.html <ul> <% @choices.each_with_index do |choice, index| %> <li><%= link_to choice, { :action => "submit_response", :id => @id, :response => index }, :remote => true %></li> <% end %> </ul> Example generated HTML: <ul> <li><a href="/poller/submit_response/yni?response=0" data-remote="true">True</a></li> <li><a href="/poller/submit_response/yni?response=1" data-remote="true">False</a></li> </ul>

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  • How/When/Where to Extend Gem Classes (via class_eval and Modules) in Rails 3?

    - by viatropos
    What is the recommended way to extend class behavior, via class_eval and modules (not by inheritance) if I want to extend a class buried in a Gem from a Rails 3 app? An example is this: I want to add the ability to create permalinks for tags and categories (through the ActsAsTaggableOn and ActsAsCategory gems). They have defined Tag and Category models. I want to basically do this: Category.class_eval do has_friendly_id :title end Tag.class_eval do has_friendly_id :title end Even if there are other ways of adding this functionality that might be specific to the gem, what is the recommended way to add behavior to classes in a Rails 3 application like this? I have a few other gems I've created that I want to do this to, such as a Configuration model and an Asset model. I would like to be able to add create an app/models/configuration.rb model class to my app, and it would act as if I just did class_eval. Anyways, how is this supposed to work? I can't find anything that covers this from any of the current Rails 3 blogs/docs/gists.

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  • How to scale thumbnail to fit depending on tall or wide photo - Attachment_fu

    - by adamwstl
    I'm using attachment_fu and Rmagick to create thumbnails after upload. The thumbnail is a fixed 135 x 135 px and I'm currently forcing the width to 135px on all photos. The problem is that if it's a wide and fat photo is has to stretch the height awkwardly. Current Attachment_fu setup class PhotoImage < Image belongs_to :photo has_attachment :content_type => :image, :size => 0..5.megabytes, :storage => :s3, :resize_to => '650x>', :thumbnails => { :thumbnail => '135x>' }#:geometry => 'x50' } validates_as_attachment end Here's what I'm trying to do: Thanks

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  • How to implement "short" nested vanity urls in rails?

    - by UnSandpiper
    I understand how to create a vanity URL in Rails in order to translate http://mysite.com/forum/1 into http://mysite.com/some-forum-name But I'd like to take it a step further and get the following working (if it is possible at all): Instead of: http://mysite.com/forum/1/board/99/thread/321 I'd like in the first step to get to something like this: http://mysite.com/1/99/321 and ultimately have it like http://mysite.com/some-forum-name/some-board-name/this-is-the-thread-subject. Is this possible?

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  • has_many :through name suggestions

    - by user1084769
    I have three models, user, achievement, badge and I plan on using has_many :through instead of has_many_and_belongs_to since I will have a few extra fields in the join tables. According to a Railscast I watched, using this method requires coming up with new model names and not user_badge or user_achievement. For my User Achievement join what do you think of Accomplishment? For my User Badge join what do you think of Distinction?

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  • SEO Friendly URLs where the phrase used may change in Rails

    - by Newy
    Say I have http://www.mysite.com/I-Like-Cheeseburgers and I want that to point to Item with id 3. Sometime later, I change the name of the item, and now its http://www.mysite.com/I-Like-Hamburgers (and perhaps many more times). I want all these URLs to remain pointing to Item 3. Is it efficient to simply keep a table of [strings,item_ids] and do a lookup on this? Is there a better way?

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  • Does rails do a rollback if I use begin...rescue?

    - by codeman73
    I'd like to add a begin...rescue block to one of my controllers create method, in order to log better info and construct the correct error message to return to the client. Does the rescue in any way 'interrupt' the rollback process? I'm assuming rails automatically does a rollback. When does it happen? Has it already happened by the time I get in the rescue clause? I'm using mySQL on Dreamhost and I think they use innoDB.

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  • Taking out a subpart from Enumerable

    - by sawa
    I often want to take out a subpart from an Enumerable. The subpart is sometimes at the beginning and sometimes the end of the original Enumerable instance, and the length used to specify the subpart is sometimes that of the subpart and sometimes its complement. That gives four possibilities, but I only know how to do three of them. Is there a way to do the fourth one? Getting the first n elements: [1, 2, 3, 4, 5].first(3) #= [1, 2, 3] or [1, 2, 3, 4, 5].take(3) #= [1, 2, 3] Dropping the first n elements: [1, 2, 3, 4, 5].drop(3) #= [4, 5] Getting the last n elements: [1, 2, 3, 4, 5].last(3) #= [3, 4, 5] Dropping the last n elements: [1, 2, 3, 4, 5].some_method(3) #= [1, 2]

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  • How do I make all the finders on the model ignorecase?

    - by Glex
    I have a model with several attributes, among them title and artist. The case of title and artist should be ignored in all the Active Record finders. Basically, if title or artist are present in the :conditions (or dynamically i.e. find_all_by_artist), then the WHERE artist = :artist should become WHERE UPPER(artist) = UPPER(:artist) or something along these lines. Is there a way of doing it with Rails?

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  • Background processing in Rails

    - by Shreyas Satish
    A certain function in my controller takes a lot of time to process (heavy db work) . So when my user clicks on "submit" on the form he has to wait for the process to complete which is quite long. Is there any way that on "submitting", the user is redirected to the next view without any delay while the processing continues in the back-end without making the user wait ? Thanks & Cheers !

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  • How to update attributes without valitation

    - by Brian Roisentul
    I've got a model with its validations, and I found out that I can't update an attribute without validating the object before. I already tried to add on => :create syntax at the end of each validation line, but I got the same results. My announcement model have the following validations: validates_presence_of :title validates_presence_of :description validates_presence_of :announcement_type_id validate :validates_publication_date validate :validates_start_date validate :validates_start_end_dates validate :validates_category validate :validates_province validates_length_of :title, :in => 6..255, :on => :save validates_length_of :subtitle, :in => 0..255, :on => :save validates_length_of :subtitle, :in => 0..255, :on => :save validates_length_of :place, :in => 0..50, :on => :save validates_numericality_of :vacants, :greater_than_or_equal_to => 0, :only_integer => true validates_numericality_of :price, :greater_than_or_equal_to => 0, :only_integer => true My rake task does the following: task :announcements_expiration => :environment do announcements = Announcement.expired announcements.each do |a| #Gets the user that owns the announcement user = User.find(a.user_id) puts a.title + '...' a.state = 'deactivated' if a.update_attributes(:state => a.state) puts 'state changed to deactivated' else a.errors.each do |e| puts e end end end This throws all the validation exceptions for that model, in the output. Does anybody how to update an attribute without validating the model?

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  • Why does schema.rb change (in the eyes of Git) when just running rake db:migrate?!

    - by erskingardner
    This is a little general I know, but it's been bugging the hell out of me. I've been working on lots of rails projects remotely with Git and every time I do a git pull and see that there is some sort of data change (migration, or schema.rb change) I do a rake db:migrate. These generally run fine and I can continue working. But if you do a git pull and then git status, your working directory is clean (obviously) then do a rake db:migrate (obviously when there are changes) and another git status and all the sudden your db/schema.rb has changed. I have been just doing a git checkout immediately to reset back to the latest committed version of the schema.rb file, but why should this be necessary?! What is rails doing? Updating a timestamp? I can't seem to figure out what the diff is but maybe I'm just missing something?

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  • What is this Hash-like/Tree-like Construct Called?

    - by viatropos
    I want to create a "Config" class that acts somewhere between a hash and a tree. It's just for storing global values, which can have a context. Here's how I use it: Config.get("root.parent.child_b") #=> "value" Here's what the class might look like: class Construct def get(path) # split path by "." # search tree for nodes end def set(key, value) # split path by "." # create tree node if necessary # set tree value end def tree { :root => { :parent => { :child_a => "value", :child_b => "another value" }, :another_parent => { :something => { :nesting => "goes on and on" } } } } end end Is there a name for this kind of thing, somewhere between Hash and Tree (not a Computer Science major)? Basically a hash-like interface to a tree.

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