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  • Where to put code snippets in Rails?

    - by Nik
    Hello all, I have this code snippets that generates a signature for POSTs. The detail of it is not important, but what I want to know is: since it is not a model-related chunk of code, it really can be use anywhere: in controllers, in models, in view helpers; even in views. So I am unsure where and, even bigger of a problem, how to activate the use of it once I place it in some location. Is it what those "require" statements are all about? That you can acquire some functionality through a "require" statement in the current file you are working on? Just so that we have an example to talk about, say, I have a little snippet of code that does cubing: def cube_it(num) num**3 end I know that I will be using it in various places across the application, so where should I put it? and when I do need to use it, how can I "summon" it? Thank You

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  • I am having trouble with my first project in ruby on rails

    - by Sebastian
    Here's my index action in the books controller: http://pastebin.com/XdtGRQKV Here's the view for the action i just mentioned: http://pastebin.com/nQFy400m Here's the result without being logged in: http://i.imgur.com/rQoiw.jpg Here's the result when i'm logged in with the user 'admin': http://i.imgur.com/E1CUr.jpg So the problem is that, in the view, before line 25 the 'user' variable seems to be empty ( or not loaded), and after line 25 the variable 'user' has the expected values. I have tried initializing a variable in the index method of the books controller but get exactly the same results. Thanks in advance! BTW had to make the links text because of stackoverflow limit.

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  • Ruby on Rails: instance & class variables not maintaining value in controller

    - by DerNalia
    at the top of my controller, outside of any method, I have @@javascript_is_disabled = false and I have methods that that the view calls and invokes something like this @@javascript_is_disabled = params[:javascript_disabled] but when I need the @@javascript_is_disabled in completely different method.. it is always false. I know it changes in the method with params args... cause those methods behave differently, and appropriately And ideas?

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  • Rescuing redirect :back after destroy in Rails?

    - by Andreas
    I'm looking for a best practice solution to be able to keep using redirect :back after a successful destroy action, as many items can be deleted from a variety of listings. Unfortunately that strategy fails for the one case when the delete is initiated from the item view itself. What approach do you recommend for this situation?

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  • Rails Plugin for Multiple Ratings Per Model?

    - by Kevin
    I'm looking to add the capability of rating a model I have under several different categories like "Knowledgeable" "Organized", etc. Is there a plugin that will allow me to do this, and maybe even have a cool x/5 stars graphical representation as well?

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  • Ruby on Rails: custom instance creation failing at redirect

    - by Jack
    I am at an absolute loss as to what I am doing wrong with the following code. I am trying to implement a messaging system within my application, but want it to be handle different types of messages. In this case, I want to create a "request" message of ':message_type = 1'. Instead of using forms as I usually have, I want to make this instance the moment the link is clicked. Here is how I have it set up in the show erb file for "user": <%=link_to "Send friend request", :action=>"request", :controller => "messages", :id => @user.id %> and in the controller: def request @message = Message.new(:sender_id => current_user.id,:user_id => params[:id],:message_type => 1) if @message.save flash[:notice] = 'Message was successfully created.' redirect_to message_path(@message) else redirect_to message_path(@message) end end This results in the following error message: undefined method `rewrite' for nil:NilClass with the trace looking like c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/whiny_nil.rb:52:in `method_missing' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:634:in `url_for' (eval):16:in `message_path' app/controllers/messages_controller.rb:11:in `request' I have used map.resources :messages in the routes.rb file, and done the appropriate :has_many and :belongs_to associations in the models of user and message.

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  • Ruby On Rails Routes

    - by Kezzer
    I can't figure out how to get the following routes. Here's an extract from my routes.rb file: map.resources :treatments map.root :controller => "home" map.connect ':controller/:action/:id' map.connect ':controller/:action/:id.:format' map.connect ':action', :controller => 'home' # replaces the need to manually map pure actions to a default controller map.resources :bookings map.resource :dashboard map.resource :home Now I do realise that the ordering matters, but I can't seem to get them to work correctly. What I want is so http://localhost:3000/bookings/new actually takes you to an action http://localhost:3000/bookings/signmeup if you're either not signed in, or haven't got a login. The problem is that if I change my routes around, when I attempt to create a new booking after I have logged in, then it doesn't POST the form submission and just takes me back to the view page. This is definitely because of the routes as if I rearrange map.resources :bookings to be before all of them, then it works. Any ideas?

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  • Rails has_one vs belongs_to semantics

    - by Anurag
    I have a model representing a Content item that contains some images. The number of images are fixed as these image references are very specific to the content. For example, the Content model refers to the Image model twice (profile image, and background image). I am trying to avoid a generic has_many, and sticking to multiple has_one's. The current database structure looks like: contents - id:integer - integer:profile_image_id - integer:background_image_id images - integer:id - string:filename - integer:content_id I just can't figure out how to setup the associations correctly here. The Content model could contain two belongs_to references to an Image, but that doesn't seem semantically right cause ideally an image belongs to the content, or in other words, the content has two images. This is the best I could think of (by breaking the semantics): class Content belongs_to :profile_image, :class_name => 'Image', :foreign_key => 'profile_image_id' belongs_to :background_image, :class_name => 'Image', :foreign_key => 'background_image_id' end Am I way off, and there a better way to achieve this association?

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  • Rails: Pass association object to the View

    - by Fedyashev Nikita
    Model Item belongs_to User. In my controller I have code like this: @items = Item.find(:all) I need to have a corresponding User models for each item in my View templates. it works in controller(but not in View template): @items.each { |item| item.user } But manual looping just to build associations for View template kinda smells. How can I do this not in a creepy way?

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  • rails: best way to store comments in mysql

    - by ciss
    Hello. Okay i have two models: posts and comments. as you can think comments has column :post_id. My models Comments belongs_to :post Post has_many :comments So, this is pretty simple association but i have some problems with ordering comments. at first time, when i create my comments migration file i just add column :position. This column indicate comment position in the post. But now i think what where is more good way to do this. so i can't make my choise: 1) uses t.column :datatime :created_at, :default = Time.now() 2) or use timestamps? this is undiscovered for me, please tell me about your exp.

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  • In MVC framworks (such as Ruby on Rails), do usually Model spell as singular and controller and view

    - by Jian Lin
    I usually see Ruby on Rails books using script/generate model Story name:string link:string which is a singular Story, while when it is controller script/generate controller Stories index then the Story now is Stories, which is plural. Is this a standard on Ruby on Rails? Is it true in other MVC frameworks too, like CakePHP, Symfony, Django, or TurboGears? I see that in the book Rails Space, the controller is also called User, which is the same as the model name, and it is the only exception I see.

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  • Ruby on Rails - observe_field help

    - by miligraf
    Trying to put in field "pagar" the calculated value of "precio" * 15% but I don't know why it is not working :S <% form_for @libro, :html => { :multipart => true } do |f| %> <%= f.label "Precio (si es venta):" %> <%= f.text_field :precio %> <%= observe_field :libro_precio, :frequency => 0.25, :update => :libro_pagar, :with => 'value*0.15' %> <%= f.label "A pagar (si es venta):" %> <%= f.text_field :pagar %> <% end %>

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  • How good is the Rails sanitize() method?

    - by Horace Loeb
    Can I use ActionView::Helpers::SanitizeHelper#sanitize on user-entered text that I plan on showing to other users? E.g., will it properly handle all cases described on this site? Also, the documentation mentions: Please note that sanitizing user-provided text does not guarantee that the resulting markup is valid (conforming to a document type) or even well-formed. The output may still contain e.g. unescaped ’<’, ’’, ’&’ characters and confuse browsers. What's the best way to handle this? Pass the sanitized text through Hpricot before displaying?

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  • Rails: Problem with routes and special Action.

    - by Newbie
    Hello! Sorry for this question but I can't find my error! In my Project I have my model called "team". A User can create a "team" or a "contest". The difference between this both is, that contest requires more data than a normal team. So I created the columns in my team table. Well... I also created a new view called create_contest.html.erb : <h1>New team content</h1> <% form_for @team, :url => { :action => 'create_content' } do |f| %> <%= f.error_messages %> <p> <%= f.label :name %><br /> <%= f.text_field :name %> </p> <p> <%= f.label :description %><br /> <%= f.text_area :description %> </p> <p> <%= f.label :url %><br /> <%= f.text_fiels :url %> </p> <p> <%= f.label :contact_name %><br /> <%= f.text_fiels :contact_name %> </p> <p> <%= f.submit 'Create' %> </p> <% end %> In my teams_controller, I created following functions: def new_contest end def create_contest if @can_create @team = Team.new(params[:team]) @team.user_id = current_user.id respond_to do |format| if @team.save format.html { redirect_to(@team, :notice => 'Contest was successfully created.') } format.xml { render :xml => @team, :status => :created, :location => @team } else format.html { render :action => "new" } format.xml { render :xml => @team.errors, :status => :unprocessable_entity } end end else redirect_back_or_default('/') end end Now, I want on my teams/new.html.erb a link to "new_contest.html.erb". So I did: <%= link_to 'click here for new contest!', new_contest_team_path %> When I go to the /teams/new.html.erb page, I get following error: undefined local variable or method `new_contest_team_path' for #<ActionView::Base:0x16fc4f7> So I changed in my routes.rb, map.resources :teams to map.resources :teams, :member=>{:new_contest => :get} Now I get following error: new_contest_team_url failed to generate from {:controller=>"teams", :action=>"new_contest"} - you may have ambiguous routes, or you may need to supply additional parameters for this route. content_url has the following required parameters: ["teams", :id, "new_contest"] - are they all satisfied? I don't think adding :member => {...} is the right way doing this. So, can you tell me what to do? I want to have an URL like /teams/new-contest or something. My next question: what to do (after fixing the first problem), to validate presentence of all fields for new_contest.html.erb? In my normal new.html.erb, a user does not need all the data. But in new_contest.html.erb he does. Is there a way to make a validates_presence_of only for one action (in this case new_contest)? UPDATE: Now, I removed my :member part from my routes.rb and wrote: map.new_contest '/teams/contest/new', :controller => 'teams', :action => 'new_contest' Now, clicking on my link, it redirects me to /teams/contest/new - like I wanted - but I get another error called: Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id I think this error is cause of @team at <% form_for @team, :url => { :action => 'create_content_team' } do |f| %> What to do for solving this error?

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  • Ruby on Rails: Modules vs. Classes

    - by Jack
    I'm trying to add a function that will be accessible throughout all parts of my program. I want something like: def GlobalFunctions.my_function(x,y) puts x + y end to be accessible for all models. Specifically I am trying to use a function like this in my seeds.rb file but I am most likely going to be reusing the code and don't want any redundancy. Now I know I can make a simple class, but I could also make a module. What are some reasons to go in either direction? And once I've decided on which type to use, how do I make it accessible throughout the whole program? I have tried a module, but I keep getting " Expected app/[module file] to define [ModuleName]"

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  • Polymorphic associations in Rails

    - by Newy
    Say I have two models, Apples and Oranges, and they are both associated with a description in a Text model. Text is a separate class as I'd like to keep track of the different revisions. Is the following correct? Is there a better way to do this? [Apple] has_one :text, :as => :targit, :order => 'id DESC' has_many :revisions, :class_name => 'Text', :as => :targit, :order => 'id', :dependent => :destroy [Text] belongs_to :targit, :polymorphic => true

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  • Rails object based permission/authorization engine?

    - by Vlad
    Hi I want to add "Sharing documents" feature to my app, like in google documents service. As i see: User can: can list/view/create/edit/delete own documents share own document to everyone - its a public document share own document to another user with read-only access share own document to another user with read-write access view list of own documents and users to whom he gave permission to read and write view list of foreign documents view/edit foreign document with read/write permissions Please tell me, which permission/authorization solution is preffered for my task?

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  • 2 Rails Apps, 1 Database (using Heroku)

    - by Paul A.
    I've made 2 apps, App A and App B. App A's sole purpose is to allow users to sign up and App B's purpose is to take select users from App A email them. Since App A & B were created independently & are hosted in 2 separate Heroku instances, how can App B access the users database in App A? Is there a way to push certain relevant rows from App A to App B?

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  • defaults for to_json in Rails with :include

    - by prateekdayal
    Let us say I have a model Post which belongs to a User. To convert to json, I do something like this @reply.to_json(:include => {:user => {:only => [:email, :id]}, :only => [:title, :id]) However, I want to set some defaults for this so I don't have to specify :only everytime. I am trying to override as_json to accomplish this. When I add as_json in User model, it is called when I do @user.to_json but when user is included in @reply.to_json, my overriden as_json for User is ignored. How do I make this work? Thanks

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