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  • Rails Model has_many with multiple foreign_keys

    - by Kenzie
    Relatively new to rails and trying to model a very simple family "tree" with a single Person model that has a name, gender, father_id and mother_id (2 parents). Below is basically what I want to do, but obviously I can't repeat the :children in a has_many (the first gets overwritten). class Person < ActiveRecord::Base belongs_to :father, :class_name => 'Person' belongs_to :mother, :class_name => 'Person' has_many :children, :class_name => 'Person', :foreign_key => 'mother_id' has_many :children, :class_name => 'Person', :foreign_key => 'father_id' end Is there a simple way to use has_many with 2 foreign keys, or maybe change the foreign key based on the object's gender? Or is there another/better way altogether? Thanks!

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  • Operations inside Rails I18n locales' strings

    - by Cristobal Viedma
    Hi, I am trying to put operations inside the locales to adapt to different languages. For example, in English a billion is 1,000,000,000, however in Spanish a billion is 1,000,000,000,000 so I would like to be able to have the following: en: billion: "You have %{money} billions" es: billion: "Tienes %{money/1000.0} billones" In order to be able to write: I18n.t :billion, :money => whatever And be right for whatever language. However, it seems that I cannot put operations inside the locales' strings. Any hint on how should I be doing this? Maybe my approach is just wrong "philosophically" talking? Thanks all!

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  • Rails nil can't be coerced into Float

    - by alex
    After adding items, attempting to view my cart leads me to this error: nil can't be coerced into Float with the math line in this method in my line_item model highlighted: def total_price product.price * quantity end line items create action def create product = Product.find(params[:product_id]) @line_item = @cart.add_product(product.id) @line_item.quantity = params[:quantity] view <div id= "text_field"><%= text_field_tag 'quantity' %> </div> <%= button_to 'Add to Cart', line_items_path(:product_id => product) %> This has held me back for a couple days. (I'm new). Thanks.

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  • Using routing (?) to make GET request in Rails so ID doesn't show

    - by ale
    I have a link in one view myapp/locations that goes to myapp/statistics?id=1 (statistics for location with ID 1) which works fine but it doesn't look pretty. I think I've seen people do this sort of thing without needing the ?id=1? I could use a POST but this is not RESTful. Is there a way I can use routing to allow the user to go to myapp/statistics?id=1 but have the user see myapp/statistics? Many thanks.

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  • Rails model without database

    - by FlipFlop
    I want to create a Rails (2.1 and 2.2) model with ActiveRecord validations, but without a database table. What is the most widely used approach? I've found some plugins that claim to offer this functionality, but many of them don't appear to be widely used or maintained. What does the community recommend I do? Right now I am leaning toward coming up with my own solution based on this blog post.

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  • Rails: How to to download a file from a http and save it into database

    - by Chris
    Hi, i would like to create a Rails controller that download a serie of jpg files from the web and directly write them into database as binary (I am not trying to do an upload form) Any clue on the way to do that ? Thank you Edit : Here is some code I already wrote using attachment-fu gem : http = Net::HTTP.new('awebsite', 443) http.use_ssl = true http.verify_mode = OpenSSL::SSL::VERIFY_NONE http.start() { |http| req = Net::HTTP::Get.new("image.jpg") req.basic_auth login, password response = http.request(req) attachment = Attachment.new(:uploaded_data => response.body) attachement.save } And I get an "undefined method `content_type' for #" error

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  • Form submission info showing up in URL and not working

    - by kcurtin
    I am making a Rails 3.1 app and have a signup form that was working fine, but I seemed to have changed something to break it.. I'm using Twitter bootstrap and twitter_bootstrap_form_for gem. I made some change that messed with the formatting of the form fields, but more importantly, when I submit the Sign Up form to create a new User, the information is showing up in the URL and looks like this: EDIT: This is happening in the latest versions of Chrome and Firefox http://localhost:3000/?utf8=%E2%9C%93&authenticity_token=UaKG5Y8fuPul2Klx7e2LtdPLTRepBxDM3Zdy8S%2F52W4%3D&user%5Bemail%5D=kevinc%40example.com&user%5Bpassword%5D=testing&user%5Bpassword_confirmation%5D=testing&commit=Sign+Up Here is the code for the form: <div class="span7"> <h3 class="center" id="more">Sign Up Now!</h3> <%= twitter_bootstrap_form_for @user do |user| %> <%= user.email_field :email, :placeholder => '[email protected]' %> <%= user.password_field :password %> <%= user.password_field :password_confirmation, 'Confirm Password' %> <%= user.actions do %> <%= user.submit 'Sign Up' %> <% end %> <% end %> </div> Here is the code for the UsersController: class UsersController < ApplicationController def new @user = User.new end def create @user = User.new(params[:user]) if @user.save redirect_to about_path, :notice => "Signed up!" else render 'new' end end end Not sure if there is more you need but if so let me know! Thank you! Edit: For debugging I tried specifying :post and also using a plain form_for <%= form_for(@user, :method => :post) do |f| %> <div class="field"> <%= f.label :email %> <%= f.email_field :email %> </div> <div class="field"> <%= f.label :password %> <%= f.password_field :password %> </div> <div class="field"> <%= f.label :password_confirmation %> <%= f.password_field :password_confirmation %> </div> <div class="actions"><%= f.submit "Sign Up" %></div> <% end %> This gives me the same problem as above. Adding routes.rb: Auth31::Application.routes.draw do get "home" => "pages#home" get "about" => "pages#about" get "contact" => "pages#contact" get "help" => "pages#help" get "login" => "sessions#new", :as => "login" get "logout" => "sessions#destroy", :as => "logout" get "signup" => "users#new", :as => "signup" root :to => "pages#home" resources :pages resources :users resources :sessions resources :password_resets end

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  • Determining which video format to use

    - by pcasa
    I want to upload a video file and convert it to flash and 3gp/mp4. No problem, plenty of tuts for this out there using paperclip and ffmpeg. For some reason I thought there was a tut that showed if std browser play flv but if mobile then use 3gp/mp4 but can't seem to find it. Any one know if there is a tut like this out there? Else, Can I tell paperclip which is flv and 3gp/mp4. Then later call something in the view like video_url(:flv) or video_url(:mp4) or set this globally if mobile?

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  • displayed value - in-place-editor

    - by Ben
    So I put in in-place editing for one of my models. One of the attributes is PRICE. I used the to_currency method to format the value before it is displayed. The problem I'm having is that with the in-place editor, I just can't figure out how to set a custom display value. I'm trying to get the price to display as $20.00 until it is clicked, but the in place editor displays 20.0..

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  • views count calculation

    - by Alexey Poimtsev
    Hi, could you give me idea how to calculate unique views of page? If i will increase counter on each page load it will be no good, otherside storing information of viewed pages in session looks like not ideal solution.

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  • Rails multi level model security

    - by rballz
    I have the need to do the following in Rails to mirror a desktop application: a User and an Office 'owns' a record, if you don't own the record on a user or office level you're kicked into the public realm. user gets read,write,delete to the model record office gets read/write/delete to the model record other or public gets read/write/delete to the model record e.g. UserA owns a model record with read/write/delete OfficeA owns a model with read/write other/public gets read I was wondering if a plugin/gem existed to grant this functionality?

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  • Call super on private method

    - by opsb
    class A private def greet puts "hello!" end end class B < A def greet super end end B.new.greet # => Attempt to call private method because super isn't a method you can't use the usual send(:super). So how's it done?

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  • Rails 3 Order By Count on has_many :through

    - by goo
    I have an application where I can list Items and add tags to each Item. The models Items and Tags are associated like this: class Item < ActiveRecord::Base has_many :taggings has_many :tags, :through => :taggings end class Tagging < ActiveRecord::Base belongs_to :item belongs_to :tag end class Tag < ActiveRecord::Base has_many :taggings has_many :items, :through => :taggings end So, this many-to-many relationship allows me to set n tags for each Item, and the same tag can be used several times. I'd like to list all tags ordered by the number of items associated with this tag. More used tags, shows first. Less used, last. How can I do that? Regards.

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  • How to get notified of changes on a read only table? (I.e., Price drop notifications.)

    - by mirthlab
    Let's say I have these tables/models: Product - id - last_updated_date - name - price User - id - name Wishlist - id - user_id - product_id The Product table has a few million records and is being updated automatically each night via a data import (inserting into a new table, dropping the old one). I basically have read-only access to that table/model. If a product is on a user's wishlist and the price drops, I'd like to be able to notify that user. What methods can be used to do this? I have a couple of ideas: Keep track of the Product.last_updated_date in the wishlist model and periodically poll the product table to see if it has been updated. This sounds like a horrible/non-scaleable solution. Some sort of Postgres View or Function that triggers when the Product table is updated? I'm new to postgres so I'm not yet sure if this is even possible. Something amazing that you will suggest that I haven't thought of :) Any help in the right direction is greatly appreciated!

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  • Rails 4 testing bug?

    - by Jamato
    Situation: if we add two identic line items into a cart, we update line item quantity instead of adding a duplicate.In browser everything works fine but in unit testing section something fails because of an empty cycle in code. Which I wanted to use to update all prices. Why? Is that a unit test engine bug? LineItem.all and cart.line_items in process of testing produce two DIFFERENT structures. #<LineItem id: 980190964, product_id: 1, cart_id: 999, created_at: "2014-06-01 00:21:28", updated_at: "2014-06-01 00:21:28", quantity: 2, price: #<BigDecimal:ba0fb544,'0.4E1',9(27)>> #<LineItem id: 980190964, product_id: 1, cart_id: 999, created_at: "2014-06-01 00:21:28", updated_at: "2014-06-01 00:21:28", quantity: 1, price: #<BigDecimal:ba0d1b04,'0.4E1',9(27)>> cart.line_items guy did not update quantity Code itself (produces LineItem which is then saved in line_item_controller which calls this method) class Cart < ActiveRecord::Base has_many :line_items, dependent: :destroy def add_product(product_id) # LOOK THIS CYCLE BREAKS UNIT TEST, SRSLY, I MEAN IT line_items.each do |item| end current_item = line_items.find_by(product_id: product_id) fresh_price = Product.find_by(id: product_id).price if current_item current_item.quantity += 1 else current_item = line_items.build(product_id: product_id, price: fresh_price) end return current_item end ... Unit test code test "non-unique item added" do cart = Cart.new(:id => 999) line_item0 = cart.add_product(2) line_item0.save line_item1 = cart.add_product(1) line_item1.save assert_equal 2, cart.line_items.size #success line_item2 = cart.add_product(1) line_item2.save assert_equal 2, cart.line_items.size, "what?" assert cart.total_price > 15 #fail, prices are not enough, quantity of product1 = 1 #we get total price from quantity, it's a simple method in model end And once again: IT DOES WORK in browser as it should. Even with cycle. I feel so dumb right now...

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  • Check boxes for a has_many and belongs_to association.

    - by Thomas
    I have a has_many and belongs_to association. class Link < ActiveRecord::Base has_and_belongs_to_many :categories belongs_to :property end class Property < ActiveRecord::Base has_many :links end In the index and show I have <%= link.property.name %> and it will show the Property that I assigned to the link with the console just fine. I have a problem with figuring out how to show check boxes in the _form that assign a property to the link (a drop down would work as well). It seems everyone who has had this question before has ether a has_many :through or a HABTM relationship and I can't seem to adapt their answers.

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  • Rails 3: Create an instance with 3 foreign keys.

    - by donald
    Hello, Having a reviews table: # Table name: reviews # # id :integer not null, primary key # wsp_id :integer # service_id :integer # user_id :integer # description :text # rating :integer # created_at :datetime # updated_at :datetime # belongs_to :wsp belongs_to :service belongs_to :user How can I create a review for a service and pass the wsp_id and user_id? Do I need to use nested routes? I am able to do @user.reviews.new(params[:review]) but I'm not being able of passing the wsp_id and the service_id. Here's my Reviews create controller. def create @review = current_user.reviews.new(params[:review]) if @review.save #Saved else #Error, not saved end end What am I doing wrong? Thank you!

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  • Rails 2.3.5: How does one access code inside of lib/directory/file.rb?

    - by randombits
    I created a file so I can share a method amongst many models in lib/foo/bar_woo.rb. Inside of bar_woo.rb I defined the following: module BarWoo def hello puts "hello" end end Then in my model I'm doing something like: def MyModel < ActiveRecord::Base include Foo::BarWoo def some_method Foo::BarWoo.hello end end The interpreter is complaining that it expected bar_woo.rb to define Foo::BarWoo. The Agile Web Development with Rails book states that if files contain classes or modules and the files are named using the lowercase form of the class or module name, then Rails will load the file automatically. I didn't require it because of this.

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  • NoMethodError when trying to invoke helper method from Rails controller

    - by John Topley
    I'm getting a NoMethodError when trying to access a method defined in one of my helper modules from one of my controller classes. My Rails application uses the helper class method with the :all symbol as shown below: class ApplicationController < ActionController::Base helper :all . . end My understanding is that this should make all of my controller classes automatically include all of the helper modules within the app/helpers directory, therefore mixing in all of the methods into the controllers. Is this correct? If I explicitly include the helper module within the controller then everything works correctly.

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  • Rails: Thread won't affect database unless joined to main Thread

    - by hatboysam
    I have a background operation I would like to occur every 20 seconds in Rails given that some condition is true. It kicked off when a certain controller route is hit, and it looks like this def startProcess argId = self.id t = Thread.new do while (Argument.isRunning(argId)) do Argument.update(argId) Argument.markVotes(argId) puts "Thread ran" sleep 20 end end end However, this code does absolutely nothing to my database unless I call "t.join" in which case my whole server is blocked for a long time (but it works). Why can't the read commit ActiveRecords without being joined to the main thread? The thread calls methods that look something like def sample model = Model.new() model.save() end but the models are not saved to the DB unless the thread is joined to the main thread. Why is this? I have been banging my head about this for hours.

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  • Sorting 2 arrays that have been added together

    - by tyler
    In my app, users can create galleries that their work may or may not be in. Users have and belong to many Galleries, and each gallery has a 'creator' that is designated by the gallery's user_id field. So to get the 5 latest galleries a user is in, I can do something like: included_in = @user.galleries.order('created_at DESC').uniq.first(5) # SELECT DISTINCT "galleries".* FROM "galleries" INNER JOIN "galleries_users" ON "galleries"."id" = "galleries_users"."gallery_id" WHERE "galleries_users"."user_id" = 10 ORDER BY created_at DESC LIMIT 5 and to get the 5 latest galleries they've created, I can do: created = Gallery.where(user_id: id).order('created_at DESC').uniq.first(5) # SELECT DISTINCT "galleries".* FROM "galleries" WHERE "galleries"."user_id" = 10 ORDER BY created_at DESC LIMIT 5 I want to display these two together, so that it's the 5 latest galleries that they've created OR they're in. Something like the equivalent of: (included_in + created).order('created_at DESC').uniq.first(5) Does anyone know how to construct an efficient query or post-query loop that does this?

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  • Yield and default case || do not output default case

    - by coulix
    Hello Railers, I have a simple yield use case and for some unknown reason the default case is never shown: In my super_admin layout I have: <%= yield :body_id || 'super_admin_main' %> My controller class Superadmin::GolfsController < ApplicationController layout "super_admin" def show end end My show view With or without <% content_for(:body_id) do %sadmin_golfs<% end % With: sadmin_golfs is shown. without: empty string is shown instead of super_admin_main Can anyone reproduce the same behavior ? Rails 3

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  • form doesn't work after use render

    - by Rodrigo
    I trying to use render method inside my activeAdmin form method, but after insert render in code, it stopped to work. form do |f| f.inputs I18n.t('sale_header') do f.input :client f.input :room end f.inputs I18n.t('sale_items') do render :partial => "form_sale" end f.inputs I18n.t('totalization') do f.input :sub_total, :input_html => { :disabled => :true } f.input :discount f.input :total_value, :input_html => { :disabled => :true } end f.buttons end After insert the render method, only form_sale content is showed on screen. Any help? Thank You!

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  • Respond_to in rails

    - by piemesons
    respond_to do |format| format.html format.xml { render :xml => @mah_blogz } end respond_to do |format| format.js end Whats this respond_to, format.html, format.xml and format.js. Whats the purpose, How they work.

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