| rails select depending on another select Posted: 01 Nov 2016 07:30 AM PDT i have license controller, license having user_id, product_id, version_id, product and version having relation between them i want to make depending select, when choosing a product the 2nd select get to me all the versions for this product <div class="field"> <%=f.label(":product_id", "Choose product")%> <%=f.collection_select :product_id, Product.all, :id, :name, include_blank: true %> </div> <div class="field"> <%=f.label(":version_id", "Choose Version")%> <%=f.grouped_collection_select :version_id, Product.all, :versions, :name, :id, :name, include_blank: true %> </div>
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| Ruby apply association on each item of collection Posted: 01 Nov 2016 07:49 AM PDT I am trying to access specific objects through associations applied one after the other on a collection. For example, one of my database request would be : get_current_user.readable_projects.cards.find(params[:card_id]).tasks
get_current_user returns a unique User, readable_projects a collection of projects that this user can read. So far, so good. However, each project has many cards, and I'd like to retrieve all the cards from each project I have in the collection, so that in this result I can do a find for a specific card, and then retrieve its tasks, the association between Card and Task being also a has_many. I could iterate through the projects with a each, but the problem is I want to use the default behavior of a find, so that if in all the cards from all the projects I don't find the one I was looking for, the default RecordNotFound routine is triggered. I could also use find_by and raise the exception manually, doing something like that : @projects = get_current_user.readable_projects @projects.each do |p| @found = p.cards.find_by(id: params[:card_id]) if @found.present? break end end if @found.present? @tasks = @found.tasks else raise ActiveRecord::RecordNotFound end
However my main objective is to get this card in a way anyone reading the code could easily understand what I am doing here. My question is : is there a way to do such kind of request in one very understandable line ? Thank you in advance for your help. |
| Rails 4.2 model relationships has_many generated helper methods for objects Posted: 01 Nov 2016 07:22 AM PDT I wondering about the automated helper methods for objects automatically generated by rails. class Car < ActiveRecord::Base has_one :steering_wheel, inverse_of: car has_many :windows, inverse_of: :car end class Window < ActiveRecord::Base belongs_to :car, inverse_of: :windows end class SteeringWheel < ActiveRecord::Base belongs_to :car, inverse_of: :steering_wheel end
With this relationship i can do car = Car.first car.create_steering_wheel
But i would like also to create a new window like car.create_window
How is it possible to do this? |
| Why does the wrong object get tested in this RSpec setup? Posted: 01 Nov 2016 07:45 AM PDT I'm having trouble with an RSpec test, and I suspect it may be to do with my explicit use of subject in the before block. Notably, I am testing ActiveRecord objects that have a has_many / belongs_to relationship. This is my failing test, in which I'm trying to assert that the parent has some behaviour based on the event of adding the child: subject { FactoryGirl.create(:parent) } let(:child) { FactoryGirl.build(:child) } context "with added child object" do before { subject.children << child } its(:foo) { is.expected_to eq("bar") end
In my parent model I have some simple logic based on adding the child record which works outside of the test. Since it doesn't work in the test, I switched to writing the spec part out long-form to try and understand why: before do puts "subject is #{subject}" puts "child is #{child}" subject.children << child puts "#{child} is now attached to #{child.parent}" end it "has the correct response" do puts "testing against subject #{subject}" expect(subject.foo).to eq("bar") end
And the output I got suggests that something weird is happening - that the subject I attach the child to is a different one to the one in the setup and testing blocks: subject is #<Parent:0x00561eddf1a7a0> child is #<Child:0x00561edcdd7fb0> #<Child:0x00561edcdd7fb0> is now attached to #<Parent:0x00561edd11c040> testing against subject #<Parent:0x00561eddf1a7a0>
Am I doing something wrong with subject to cause this behaviour? Is there a better way to write this test? |
| How to add invalid records to has_many :through association Posted: 01 Nov 2016 07:16 AM PDT I have a house model with a has_many-association for rooms. house = House.find 1 dining_room = Room.find 1 living_room = Room.find 2
The living_room is not a valid dataset. So if I add the rooms to the house house << dining_room house << living_room
the living_room wasn't added, because it's invalid. How can I skip the validation when adding an existing record to a has_many-association? |
| How to search by rating post? Posted: 01 Nov 2016 06:59 AM PDT I use gem 'ransack' and gem 'ratyrate'. How to combine these two gem I am trying to do here so <%= f.select :rates_id, options_from_collection_for_select(RatingCache.all, "id", "avg"), {:prompt => ''} %>
Gives an error message: "You tried to define an association named rates on the model Post, but this will conflict with a method rates already defined by Active Record. Please choose a different association name." |
| Rails has_many and belongs_to returns nil Posted: 01 Nov 2016 06:58 AM PDT I have two models 'articles' and 'bookmarks' and have associated them using a specific column 'article_doi' as foreign_key. In article.rb, has_many :bookmarks, class_name: 'Bookmark', foreign_key: "article_doi", dependent: :destroy
In bookmark.rb, belongs_to :article, class_name: 'Article', foreign_key: "article_doi" But when I do article_object.bookmarks, it returns a nil Also when I do bookmark_object.article, it returns nil. What has gone wrong? |
| Find user by confirmation_token devise rails? Posted: 01 Nov 2016 06:33 AM PDT I need to find user by it's confirmation token, but in the most recent version of Devise and Rails 4, it doesn't seem to work. I'm using: User.find_by(confirmation_token: Devise.token_generator.digest(self, :confirmation_token, params[:confirmation_token]))
What's wrong? |
| Facebook share button is not working? Posted: 01 Nov 2016 05:54 AM PDT I have a room model and I want to create a share button for facebook. So I decided to do this with the sharer url method. I want to have a facebook icon on the show.html.erb (room view) where a user or visitor can share the room on facebook. When I click on the link I am redirected to facebook where I have to enter the link manually and not automatically which I want to share. If I am updating the show.html.erb link_to into: <%= link_to image_tag('facebook_icon_red.png'), 'http://www.facebook.com/sharer.php?u=<%= yield :url %>', :target => :blank %>
Then I am getting an error: 
How can I make this work? application.html.erb <!DOCTYPE html> <html> <head> ... ... <!-- for Facebook --> <meta property="og:title" content="<%= @room.listing_name %>" /> <meta property="og:type" content="room" /> <meta property="og:image" content="" /> <meta property="og:url" content="<%= room_url(@room) %>" /> <meta property="og:description" content="<%= @room.detailed_description %>" /> </head> <body> <!-- Facebook Sharing Settings--> <div id="fb-root"> </div> <script src="http://connect.facebook.net/en_US/all.js" type="text/javascript"></script> <script type="text/javascript"> FB.init({ appId: MY_ID(SOME NUMBERS), status: true, cookie: true, xfbml: true }); FB.Canvas.setAutoResize(); </script> ... ... ... </body> </html>
show.html.erb (room) ... <!-- Do you like this Accommodation? --> <%= link_to image_tag('facebook_icon_red.png'), "http://www.facebook.com/sharer.php?u=", :target => :blank %> FB.ui( { method: 'feed', name: 'Facebook Dialogs', link: 'http://developers.facebook.com/docs/reference/dialogs/', picture: 'http://fbrell.com/f8.jpg', caption: 'Reference Documentation', description: 'Dialogs provide a simple, consistent interface for applications to interface with users.', message: 'Facebook Dialogs are easy!' }, function(response) { if (response && response.post_id) { alert('Post was published.'); } else { alert('Post was not published.'); } } );
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| Rails multi language in async way (AJAX) Posted: 01 Nov 2016 05:02 AM PDT i'm new in rails. I have in my content in two languages, and then the controller will return only the content in a specific language. For that i'm trying to do this using Ajax. i'm trying to make a simple example using ajax with rails. well this is my controller: class WelcomeController < ApplicationController def index @init_content = Initial.get_content(params[:lang]) if request.xhr? render :partial => "welcome/home" end end end
And i have a simple ajax call which on success would be nice to load a div wihout losing javascript bindings. $.get( "/", { lang: "EN" } ) .done(function( data ) { $("#home").load(data) });
The response it seems ok but is not loading nothing and it perfoms an extra GET with the last characters of authenticity token and i don't understand why. In another hand if i use $("#home").html(data) but it will lose all javascript binding. The only way for me seems that i will have to get all the content in json format and make a javascript to fill my html elements. How is the best way to do this using rails? Does rails have any method that reloads a view without losing the javascript bindings? |
| Is callback needed for loops containing API requests? Posted: 01 Nov 2016 06:41 AM PDT I'm on Rails and I use Koala in a cron job to import all comments Facebook. Is it ok to use a for loop where each time I make a request and store the response? Or there is a risk for which the for restart before I get a response from Facebook all gets messed up? In other words: Does the loop wait for the response or do I need a callback function? Here is the loop: def self.import_comments # Access Facebook API facebook = Feed.get_facebook_access # Run 190 queries per cron job for i in 1..190 id_of_latest_feed = Feed.get_latest['fb_id'] id_of_latest_feed_checked = Option.get_feed_needle # Check if there are more recent feeds than the latest checked if id_of_latest_feed != id_of_latest_feed_checked # Get the facebook id of the feed which comes after the latest checked latest_feed_checked = Feed.where( fb_id: id_of_latest_feed_checked ).first this_date = latest_feed_checked['fb_updated_time'] feed_to_check = Feed.get_older_than( this_date ) unless feed_to_check.nil? # Get the ID of the feed to check fb_id = feed_to_check['fb_id'] # Update needle Option.update_feed_needle_to( fb_id ) # -------- REQUEST! --------- # # Get comments from Facebook @comments = facebook.get_object("#{ fb_id }/comments?filter=stream") # Save each comment @comments.each do |comment| if Comment.exists?(fb_id: comment['id']) # don't do anyhting else # save the comment end end end end end end
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| How to Dynamically add attributes from csv file Posted: 01 Nov 2016 05:49 AM PDT I am new to RoR. I want to dynamically add attributes from a csv file so that my code would be able to dynamically read any csv file and build the db (i.e. convert any CSV file into Ruby objects) I was using the below code csv_data = File.read('myData.csv') csv = CSV.parse(csv_data, :headers => true, :header_converters => :symbol) csv.each do |row| MyModel.create!(row.to_hash) end
However it will fail for the following example myData.csv Name,id foo,1 bar,10
myData2.csv Name,value foo,1 bar,10
It will result an error for myData2 because the value is not a parameter in MyModel unknown attribute 'value' for MyModel. I have thought about using send(:attrAccessor, name) but I was not sure how can I integrate it when reading from csv, any ideas ? |
| Creating new Rails project on Ubuntu returning error Posted: 01 Nov 2016 05:04 AM PDT I am currently new to the Linux OS (Ubuntu). I was once learning to develop Rails application on Windows but I found out that it is better to develop Rails applications on Linux since there are some limitations on Windows. I dual booted my computer so I can have Linux and Windows at the same time. So I installed Ruby and Rails using the RVM (I followed this setup: https://www.youtube.com/watch?v=hiPQynmnsiI) and I created a test project named web and placed it on my desktop. There were no errors prior to the creation of the project but when I ran the command rails s it returned the following: /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler /runtime.rb:94:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError) Gem Load Error is: Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. Backtrace for gem load error is: /home/arjay/.rvm/gems/ruby-2.3.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:in `autodetect' /home/arjay/.rvm/gems/ruby-2.3.0/gems/execjs-2.7.0/lib/execjs.rb:5:in `<module:ExecJS>' /home/arjay/.rvm/gems/ruby-2.3.0/gems/execjs-2.7.0/lib/execjs.rb:4:in `<top (required)>' /home/arjay/.rvm/gems/ruby-2.3.0/gems/uglifier-3.0.3/lib/uglifier.rb:5:in `require' /home/arjay/.rvm/gems/ruby-2.3.0/gems/uglifier-3.0.3/lib/uglifier.rb:5:in `<top (required)>' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:91:in `require' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:91:in `block (2 levels) in require' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `each' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `block in require' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `each' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `require' /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler.rb:106:in `require' /home/arjay/Desktop/web/config/application.rb:7:in `<top (required)>' /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `require' /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `block in server' /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap' /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server' /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!' /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>' /home/arjay/Desktop/web/bin/rails:9:in `require' /home/arjay/Desktop/web/bin/rails:9:in `<top (required)>' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `load' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `call' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client/command.rb:7:in `call' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client.rb:30:in `run' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/bin/spring:49:in `<top (required)>' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `load' /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `<top (required)>' /home/arjay/Desktop/web/bin/spring:14:in `require' /home/arjay/Desktop/web/bin/spring:14:in `<top (required)>' bin/rails:3:in `load' bin/rails:3:in `<main>' Bundler Error Backtrace: from /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:90:in `block (2 levels) in require' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `each' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in `block in require' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `each' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in `require' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/bundler-1.13.6/lib/bundler.rb:106:in `require' from /home/arjay/Desktop/web/config/application.rb:7:in `<top (required)>' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `require' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:88:in `block in server' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>' from /home/arjay/Desktop/web/bin/rails:9:in `require' from /home/arjay/Desktop/web/bin/rails:9:in `<top (required)>' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `load' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `call' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client/command.rb:7:in `call' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/client.rb:30:in `run' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/bin/spring:49:in `<top (required)>' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `load' from /home/arjay/.rvm/gems/ruby-2.3.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `<top (required)>' from /home/arjay/Desktop/web/bin/spring:14:in `require' from /home/arjay/Desktop/web/bin/spring:14:in `<top (required)>' from bin/rails:3:in `load' from bin/rails:3:in `<main>'
Thank you for anyone who can help me out! |
| D3 pie chart: Uncaught Type Error - Cannot read property 'pie' of undefined Posted: 01 Nov 2016 03:52 AM PDT I am attempting to create a d3 pie chart based off of this resource. However, I get the following error: Uncaught Type Error - Cannot read property 'pie' of undefined My code: class PieChart extends React.Component { constructor() { super(); // - This is where the error is occuring! this.pie = d3.layout.pie().value((d) => d.value); this.colors = d3.scale.category10(); } arcGenerator(d, i) { return ( <LabeledArc key = {`arc-${i}`} data = {d} innerRadius = {this.props.innerRadius} outerRadius = { this.props.outerRadius } color = {this.colors(i)} /> ); } render() { console.log('Render Method Fires'); let pie = this.pie(this.props.data), translate = `translate(${this.props.x}, ${this.props.y})`; return ( <g transform={translate}> {pie.map((d, i) => this.arcGenerator(d, i))} </g> ); } }
I think I have everything setup correctly. Im using react-rails gem as well as the d3-rails. I had to download the d3.js and put it directly in my js folder to get rid of the 'cannot find d3'. Can anyone point me in the right direction, maybe you have a better resource for adding d3 + react functionality in rails? |
| Adding a remote link to the flash Posted: 01 Nov 2016 03:58 AM PDT Hi so I'm working on a project and I want to be able to have a link in the flash that opens in a modal, so I need the link to be remote. So I have flash[:link] = { text: "Click here", location: new_post_path, remote: true }
but when the flash is loaded, it doesn't actually load as a remote link? Any help fixing this would be greatly appreciated. |
| apache 2.4.18 + passenger 5.0.30 = 403 errors Posted: 01 Nov 2016 02:46 AM PDT I have installed fresh Ubuntu 16.04 server with apache 2.4.18, added passenger 5.0.30, rvm, rails, all following tutorials on their websites like this one: https://www.phusionpassenger.com/library/walkthroughs/deploy/ruby/ownserver/apache/oss/xenial/install_passenger.html I did apt-get dist-upgrade to update all to newest version. This is my second ubuntu install in one week which has the same problem. It runs apache alright, I can get directory file listing, but when accessing rails app public directory, i get 403 errors, although user rights on directory and files are correct. "You don't have permission to access / on this server." Here are my apache settings: <VirtualHost *:80> ServerName daskonzert.org ServerAlias www.daskonzert.org DocumentRoot "/media/i/www/daskonzert.org/public" ErrorLog ${APACHE_LOG_DIR}/das_konzert_error.log CustomLog ${APACHE_LOG_DIR}/das_konzert_access.log combined RailsEnv production RackEnv development PassengerDefaultUser www-data PassengerRuby /usr/local/rvm/gems/ruby-1.8.7-head/wrappers/ruby <directory "/media/i/www/daskonzert.org/public"> Require all granted Options FollowSymLinks AllowOverride None Order allow,deny Allow from all Options -MultiViews </directory> </VirtualHost>
There was a bug in passenger regarding this issue, but was resolved last year supposedly. Already tried this and some other advices for configuration file settings, doesnt help: I'm getting 403 error using passenger for rails in apache Any ideas? |
| Mongoid not persisting array Posted: 01 Nov 2016 02:45 AM PDT Ok, I got an Model like so: Class Campaign include Mongoid::Document ... field :stats, type: Array, default: [] end
And trying to persist changes to the stats property like so: campaign[:stats] += [hash]
When I inspect the object in memory, the changes are visible, however it is not being persisted to the db. I've found this answer which seems to address the issue (and I changed my code accordingly as previously I was trying with this: campaign.stats << hash
And neither approach is working. Any ideas why? |
| undefined method `pathname' for Sprockets::Asset Posted: 01 Nov 2016 03:17 AM PDT I have a problem in loading stylesheets/application and javascripts/applications in my layout/application.haml file. When I type "rails s" and refresh the page I see following error: log from log/development.log file ActionView::Template::Error (undefined method `pathname' for #<Sprockets::Asset:0x00000005375e10>): 5: %meta{ content: 'IE=Edge,chrome=1', 'http-equiv' => 'X-UA-Compatible' }/ 6: %meta{ content: 'width=device-width, initial-scale=1.0', name: 'viewport' }/ 7: = csrf_meta_tags 8: = stylesheet_link_tag 'application', media: 'all' 9: = javascript_include_tag 'application' 10: 11: %body app/views/layouts/application.html.haml:8:in `_app_views_layouts_application_html_haml__541114027848535829_70097966813720'
views/layout/application.haml !!! %html{ lang: 'en' } %head %meta{ charset: 'utf-8' }/ %meta{ content: 'IE=Edge,chrome=1', 'http-equiv' => 'X-UA-Compatible' }/ %meta{ content: 'width=device-width, initial-scale=1.0', name: 'viewport' }/ = csrf_meta_tags = stylesheet_link_tag 'application', media: 'all' = javascript_include_tag 'application' %body %nav.navbar.navbar-default .container-fluid .navbar-header %span.navbar-brand #{AppConfig.workshops_name} %p.navbar-text.navbar-right Links should go here .container-fluid .row .col-lg-12 = yield
gemfile source 'https://rubygems.org' gem 'rails', '4.1.8' gem 'pg' gem 'draper' gem 'decent_exposure' gem 'decent_decoration' gem 'devise' gem 'simple_form', '~> 3.1.0rc' gem 'bootstrap-sass' gem 'haml-rails' gem 'sass-rails', github: 'rails/sass-rails' gem 'coffee-rails' gem 'uglifier' gem 'quiet_assets' gem 'jquery-rails' gem 'therubyracer', platforms: :ruby gem 'travis' gem 'ffaker' gem 'faker' gem 'konf' group :development do gem 'spring' end group :development, :test do gem 'rspec-rails' gem 'factory_girl_rails' gem 'pry' end group :test do gem 'database_cleaner' gem 'shoulda-matchers', require: false end ruby '2.3.1'
assets/stylesheets/application /* *= require_tree . *= require_self */
assets/javascripts/application // //= require jquery //= require jquery_ujs //= require bootstrap-sprockets //= require_tree .
I don't know what else can be helpful. Does anyone knows what's going on here? Thanks in advance! |
| ActionView::Template::Error (PG::UndefinedColumn: ERROR: column does not exist) Posted: 01 Nov 2016 02:56 AM PDT model Attempt 1 def challenge_date deadline || date_started end
Attempt 2 def challenge_date if deadline != date_started [deadline, date_started].reject(&:blank?).join() else date_started end end
Both attempts gave the error. I need the method to iterate through next_user_challenge def next_user_challenge user.challenges.where('challenge_date > ?', challenge_date).order('challenge_date ASC').first end
rails c # some challenges will just have a deadline id: 1, name: "Publish a Novel", deadline: Sat, 26 Nov 2016, date_started: nil, user_id: 117, # some challenges will just have a date_started id: 2, name: "Write a Chp", deadline: nil, date_started: Thu, 20 Oct 2016, user_id: 117, # and some challenges will have both id: 3, name: "Run a Mile", deadline: Thu, 26 Sep 2016, date_started: Thu, 26 Sep 2016, # If challenge has both deadline and date_started then date_started will be the same date as the deadline user_id: 117,
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| the user cannot destroy a record in a rail 5 application after deployment with Capistrano? Posted: 01 Nov 2016 02:11 AM PDT I have developed a very simple apps for trying out deployment on AWS server with Rails 5.0.0.1 and ruby 2.3.1. As a user, I can delete a record without any problems on my localhost:3000. However I cannot delete a record after I have successfully deployed to a AWS amazon server with Nginx, Puma and Capistrano at 35.161.251.52/contacts, if you want to try. The destroy link becomes a show link. I have followed this tutorial at https://www.sitepoint.com/deploy-your-rails-app-to-aws/ Can anyone shine a light on this? Thanks a lot! |
| How to monkey-patch an ActionView module via prepend? Posted: 01 Nov 2016 01:59 AM PDT If you include a module Foo in a class SomeClass, then prepend that module with another module Bar, any method-overwriting inside Bar will not take effect in SomeClass. Example: module Foo def some_method puts 'In Foo' end end class SomeClass include Foo end SomeClass.new.some_method # => 'In Foo' module Bar def some_method puts 'In Bar' super end end Foo.prepend Bar Foo.ancestors # => [Bar, Foo] SomeClass.new.some_method # => 'In Foo' class AnotherClass include Foo end AnotherClass.new.some_method # => # 'In Bar' # 'In Foo'
I am trying to monkey-patch an ActionView helper method the following way: In lib/core_extensions/action_view/helpers/url_helper/secure_link_to: module CoreExtensions module ActionView module Helpers module UrlHelper module SecureLinkTo def link_to(name = nil, options = nil, html_options = nil, &block) html_options ||= {} if html_options[:target].present? html_options[:rel] = 'noopener noreferrer' end super(name, options, html_options, &block) end end end end end end
and then in an initializer: ActionView::Helpers::UrlHelper.prepend CoreExtensions::ActionView::Helpers::UrlHelper::SecureLinkTo
However, this doesn't seem to work. My assumption - by the time the initializer executes, ActionView::Helpers::UrlHelper has already been included (in wherever it is supposed to be included) and thus the prepending doesn't seem to take effect. Does anybody know a solution to this? |
| Rails showing attribute at beginning and end of a date range Posted: 01 Nov 2016 01:24 AM PDT I am creating this report which shows for each product how many units were purchased, sold and returned. These values are already calculated in my controller and shown in my view. I have a database table stockdiaries that contains columns ID, DATENEW, PRODUCT, LOCATION, UNITS, PRICE, REASON, STOCK. STOCK is the current stock after a certain stockdiary. Now I need to add 2 columns. Start Stock and End Stock. And achieve this for each row: Product: Product A Start Stock: 10 Purchased: 5 Sold: -3 Returned: -1 End Stock: 11 Then using ransack I will be able to filter a date range and see how products moved during that period. My controller SummaryConsignor, which refers to Stockdiary Model class SummaryConsignorsController < StockdiariesController def index params.permit! @q = Stockdiary.joins(:product, :location).where('products.CONSIGNOR is not null').group(:PRODUCT).select("SUM(CASE WHEN `REASON`='-1' THEN (UNITS) ELSE 0 END) AS SOLD, SUM(CASE WHEN `REASON`='-7' THEN (UNITS) ELSE 0 END) AS RETURNED, SUM(CASE WHEN `REASON`='6' THEN (1*UNITS) ELSE 0 END) AS RECEIVED, UNITS, DISCOUNT, DISCOUNT_CONSIGNOR, stockdiary.PRODUCT, REASON, STOCK").ransack(params[:q]) @summary_consignors = @q.result.paginate(:page => params[:page], :per_page => 30) @summary_consignorsnp = @q.result @amount_total = @q.result.map(&:total_amount).sum @discount_total = @q.result.map(&:DISCOUNT).sum @total = @q.result.map(&:total).sum @gross_profit_total = @q.result.map(&:gross_profit).sum @consignment_cost_total = @q.result.map(&:consignment_cost).sum @profit_total = @q.result.map(&:profit).sum respond_to do |format| format.html format.pdf do pdf = SummaryConsignorPdf.new(@summary_consignorsnp) pdf.render_file "report.pdf" send_data pdf.render, filename: 'report.pdf', type: 'application/pdf', disposition: 'inline' end end end
My Model Stockdiary class Stockdiary < ActiveRecord::Base include ActionView::Helpers::NumberHelper belongs_to :product, :foreign_key => 'PRODUCT' belongs_to :location, :foreign_key => 'LOCATION' self.table_name = "stockdiary" def total_amount ( price = self.try(:PRICE) || 0 units = self.try(:UNITS) || 0 price * units) end def total ( discount = self.try(:DISCOUNT) || 0 price = self.try(:PRICE) || 0 units = self.try(:UNITS) || 0 (price * units) - discount) end def gross_profit location = product.location.try(:DISCOUNT_CONSIGNOR) location ? (self.total * location) : 0 end def consignment_cost (self.total - self.gross_profit) end def profit (self.total_amount - self.consignment_cost) end def suppliers_name suppliers_name = self.product.suppliers.pluck(:NAME).join(', ') end class SummaryConsignor < Stockdiary end
My view summary_consignors index <% @summary_consignors.each do |summary_consignor| %> <tr class="<%= cycle('odd', 'even') %>"> <td><%= link_to summary_consignor.product.NAME, { controller: :products, action: :edit, ID: summary_consignor.product.ID }, :target => "_blank" %></td> <td><%= summary_consignor.product.extra1_detail.try(:DESCRIPTION) %></td> <td><%= summary_consignor.product.extra2_detail.try(:DESCRIPTION) %></td> <td><%= summary_consignor.product.category.NAME %></td> <td><%= summary_consignor.product.location.try(:NAME) %></td> <td><%= number_to_human summary_consignor.SOLD, precision: 0 %></td> <td><%= number_to_human summary_consignor.RECEIVED, precision: 0 %></td> <td><%= number_to_human summary_consignor.RETURNED, precision: 0 %></td> </tr>
My partial view for ransack filters: <div class="large-4 small-6 columns" > <%= search_form_for @q do |f| %> <div class="large-6 small-6 columns" > <%= f.label :DATENEW, "from date" %> <%= f.text_field :DATENEW_gteq, 'datepicker' => true %> </div> <div class="large-6 small-6 columns" > <%= f.label :DATENEW, class: "to_date" %> <%= f.text_field :DATENEW_lteq, :as => :date_picker, class: "radius" %> </div> </div> <div class="large-12 small-12 columns" %> <%= f.submit "Search", class: " radius button" %> <%= link_to 'Clear Filters', summary_consignors_path, class:"secondary button" %> </div> <% end %>
Now thanks to @SteveTurczyn help I understand that by setting this on my controller: from_date = DateTime.parse('2016-10-01') to_date = DateTime.parse('2016-10-31').end_of_day @stockopenclose = {} products = Stockdiary.where('DATENEW >= ? AND DATENEW <= ?',from_date, to_date).pluck(:product).uniq.sort products.each do |product| movements = Stockdiary.where('DATENEW >= ? AND DATENEW <= ? AND PRODUCT = ?',from_date, to_date, product) opening_value = movements.sort('DATENEW ASC').limit(1).pluck('STOCK').first closing_value = movements.sort('DATENEW DESC').limit(1).pluck('STOCK').first @stockopenclose[product] = [opening_value, closing_value] end
I get an array with the values I'm looking for (although for static dates). So my 2 questions are: 1 What's the right way to show them in view? 2 How do I replace from_date and to_date values to use values entered on ransack search form? |
| Where can I find the document of present? method of ActiveRecord_Relation in Rails? Posted: 01 Nov 2016 01:25 AM PDT I'm new to Rails. When I'm studying Rails, I come across some methods which I don't know how to use. Then I try to Google, but the outcome is not very good.
For example, I defined a model User. In the UsersController, I defined index method. In this method, someone used the @users.present? method. I'm not sure what it is. So I want to know how the official site says about it. Where can I find the explanation of this method.
Could you tell me the way to study methods like this? |
| Rails dependent destroy on non associated objects Posted: 01 Nov 2016 03:23 AM PDT I have two tables. 'articles' and 'bookmarks'. I want to define association between them. the articles table have 'doi' column which is used in bookmarks table. articles: | doi| varchar(255) | YES | MUL | NULL |
bookmarks: +-----------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------------+--------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | user_profile_id | int(11) | NO | MUL | NULL | | | device_id | int(11) | NO | MUL | NULL | | | article_doi | text | NO | | NULL | | | disabled_at | varchar(255) | YES | | NULL | | | created_at | datetime | YES | | NULL | | | updated_at | datetime | YES | | NULL | | +-----------------+--------------+------+-----+---------+----------------+
For some reasons I cannot use article's id to refer the article in bookmarks table. Now I want to add dependant destroy to all bookmarks that has that particular article's doi in the article_doi column (delete all bookmarks when an article is deleted). How can I achieve that? |
| Rails, Simple Form, Cocoon - nested attributes Posted: 01 Nov 2016 12:34 AM PDT I have a model for organisation and another model for ip. Ip is nested under a namespace folder called Stance. The associations are: Organisation has_one :ip, class_name: Stance::Ip accepts_nested_attributes_for :ip, reject_if: :all_blank, allow_destroy: true
IP belongs_to :organisation, inverse_of: :ip
I am using Cocoon to nest attributes from the IP table in the Organisation form. My organisation form is as follows: <%= f.simple_fields_for :ip do |f| %> <%= f.error_notification %> <%= render 'stance/ips/ip_fields', f: f %> <% end %> <% !if @organisation.ip.present? %> <%= link_to_add_association 'Manage Intellectual Property Policy ', f, :ip, partial: 'stance/ips/ip_fields' %> <% end %>
I have an if statement around the add association link because Organisation only has one ip policy. I just tried all of this, but when i click on the remove association at the bottom of the IP form, the record doesnt actually get destroyed. I can see that because the console still shows the record attributes and when I go back to edit the organisation form, I expect to see the option to add another ip instance (which would then be the only ip instance). Instead, I don't get that link. My organisation controller has: def new @organisation = Organisation.new @organisation.build_ip end def edit @organisation.build_ip unless @organisation.ip end def organisation_params params.fetch(:organisation, {}).permit(:title, :logo, :comment, ip_attributes: [:id, :research_access, :teaching_access, :commercial_access, :ip_ownership, :_destroy], ) end
What do I need to do to get the ip record to be destroyed when I click the remove link in the ip form fields? |
| Materialize label gets overlapped in production env Posted: 01 Nov 2016 05:23 AM PDT I'm using materialize for my web page, and the problem is the label gets overlapped with the field over the text, this issue occurs only in the production environment, but works fine in the develop <div class="input-field col s12"> <%= f.text_field :phone, id: "phno", "data-parsley-error-message" => "Please enter your phone number.", required: true %> <label for="phno">Phone</label> </div>
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| Elongated CURL output in rails Posted: 31 Oct 2016 11:09 PM PDT When you run CURL on the commandline, you'll see output similar to the following: macbook:~ user$ curl google.com -o testgoogle.html % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 262 100 262 0 0 10647 0 --:--:-- --:--:-- --:--:-- 10916 macbook:~ user$
I find similar, strange elongated output such as the below, repeated frequently in my rails production.log file [Tue Nov 01 16:37:51.617147 2016] [mpm_prefork:notice] [pid 15243] AH00171: Graceful restart requested, doing restart [Tue Nov 01 16:37:51.767113 2016] [so:warn] [pid 15243] AH01574: module passenger_module is already loaded, skipping [Tue Nov 01 16:37:51.770601 2016] [so:warn] [pid 15243] AH01574: module ssl_module is already loaded, skipping [Tue Nov 01 16:37:51.772164 2016] [so:warn] [pid 15243] AH01574: module ssl_module is already loaded, skipping [Tue Nov 01 16:37:51.772319 2016] [so:warn] [pid 15243] AH01574: module ssl_module is already loaded, skipping [Tue Nov 01 16:37:51.935146 2016] [ssl:warn] [pid 15243] AH02292: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366) [ 2016-11-01 16:37:52.0096 16202/7f00e9003780 agents/Watchdog/Main.cpp:538 ]: Options: { 'analytics_log_user' => 'nobody', 'default_group' => 'nogroup', 'default_python' => 'python', 'default_ruby' => '/home/ubuntu/.rvm/gems/ruby-2.1.4@global/wrappers/ruby', 'default_user' => 'nobody', 'log_level' => '0', 'max_pool_size' => '6'> [ 2016-11-01 16:37:52.0158 16205/7f9c84e5d780 agents/HelperAgent/Main.cpp:650 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.15243/generation-26/request [ 2016-11-01 16:37:52.0233 16211/7f31ba5fd7c0 agents/LoggingAgent/Main.cpp:321 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.15243/generation-26/logging [ 2016-11-01 16:37:52.0235 16202/7f00e9003780 agents/Watchdog/Main.cpp:728 ]: All Phusion Passenger agents started! [Tue Nov 01 16:37:52.024250 2016] [mpm_prefork:notice] [pid 15243] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.20 OpenSSL/1.0.1f Phusion_Passenger/4.0.53 configured -- resuming normal operations [Tue Nov 01 16:37:52.024270 2016] [core:notice] [pid 15243] AH00094: Command line: '/usr/sbin/apache2' App 16230 stderr: App 16230 stderr: App 16230 stderr: % App 16230 stderr: App 16230 stderr: T App 16230 stderr: o App 16230 stderr: t App 16230 stderr: a App 16230 stderr: l App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: % App 16230 stderr: App 16230 stderr: R App 16230 stderr: e App 16230 stderr: c App 16230 stderr: e App 16230 stderr: i App 16230 stderr: v App 16230 stderr: e App 16230 stderr: d App 16230 stderr: App 16230 stderr: % App 16230 stderr: App 16230 stderr: Xferd Averag App 16230 stderr: e Speed Time Time Time Current App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: App 16230 stderr: Dloa App 16230 stderr: d Upload Total Spent Left Speed App 16230 stderr: App 16230 stderr: 0 0 App 16230 stderr: 0 0 0 0 0 0 --:--:-- - App 16230 stderr: -:--:-- --:- App 16230 stderr: -:-- 0 100 242 0 App 16230 stderr: 0 100 242 0 1196 --:--:-- --:--:-- --:--:-- 1192 100 244 100 2 App 16230 stderr: 100 242 5 721 --:--:-- --:--:-- --:--:-- 720 App 16230 stdout: ok [ 2016-11-01 16:37:55.3612 16205/7f9c84da7700 Pool2/SmartSpawner.h:298 ]: Preloader for /var/www/railsapp started on PID 16230, listening on unix:/tmp/passenger.1.0.15243/generation-26/backends/preloader.66bb10
Needless to say, no rails code calls/uses CURL. Has anyone encountered this weird log output before, and what caused it for you? |
| Add attribute to ActiveRecord_Relation results based on existence of relationship? Posted: 31 Oct 2016 11:18 PM PDT I have a users table, a notifications table, and a join table of notification_reads. I'm trying to write a scope for an ActiveRecord query that will return all of the notifications (Notification.all) with an additional field based on whether the user has a correlating notification_read for that notification. I'm imagining it would look something like: class Notification scope :with_reads_by_user, -> (user) { select("*", "[some sql that produces a boolean] as read") .joins(:notification_reads) .where(notification_reads: {user: user}) } end
Nothing I've tried has seemed to come close, though. |
| Making an image cover a whole div of fixed height - Rails Carrierwave CSS Posted: 31 Oct 2016 11:00 PM PDT I'm working in a rails Instagram-like project where users can submit posts, each with a corresponding photo. My objective now is to create a div that contains both a header (with some information) and a photograph. ( So my html.erb is something like this: <div class="post-content"> <div class="header"> <!-- some other code here --> </div> <div class="photo-container"> <%= image_tag(post.image_url, class:'img-responsive') %> </div> </div>
The tricky bit is that: 1. I'd like to make the the "post-content" div of a particular 'fixed' size regardless of the size of image the user uploads. 2. The image to cover the whole "post-content" div without cutting out any overflow. 3. For the image to be responsive - I'm using Bootstrap. So far my relevant scss code is like: .post-content-panel { width: 60%; margin: 0 auto; padding: 0; // height: 300px; I'd like to fix this. } .photo-container img { max-width: 100%; height: auto; }
This works partially. The image is responsive, covers the whole div but unfortunately the height of the parent div expands or retracts according to the image height. I've tried to: 1. Fix the post-content-panel height but this 2. Transform the image with transform: scale(0.5) but although the size is reduced the image doesn't cover the whole container div. 3. Standardise image sizes at upload in Carrierwave (gem I'm using in the backend). I used resize_to_fill and resize_to_fit without success (either the image is cut or it gets deformed. How could I make this work. Is it a Carrierwave issue so I images are not cut when resized or could you see any css solution here regardless the size of the image. Thanks |
| Uncaught ReferenceError: FluxDispatcher is not defined Posted: 31 Oct 2016 11:09 PM PDT This is my first time attempting to use react. I am running into the following error which is being displayed below. Uncaught ReferenceError: FluxDispatcher is not defined. I belive I have required all the correct gems and javascript files but, I can't figure out why FluxDispatcher is not being defined. Below I have listed out some of files, please let me know if I need to provide any more information. 
Gemfile source 'https://rubygems.org' gem 'rails', '4.2.2' gem 'sqlite3' gem 'sass-rails', '~> 5.0' gem 'uglifier', '>= 1.3.0' gem 'jquery-rails' gem 'jbuilder', '~> 2.0' gem 'awesome_print', '~> 1.7' gem 'bootstrap', '~> 4.0.0.alpha5' gem 'ancestry' gem 'rails_admin' gem 'react-rails' gem 'flux-rails-assets' gem 'lodash-rails' source 'https://rails-assets.org' do gem 'rails-assets-tether', '>= 1.1.0' end group :development, :test do gem 'byebug' gem 'web-console', '~> 2.0' gem 'spring' end
appliction.js //= require jquery //= require jquery_ujs //= require tether //= require bootstrap //= require lodash //= require react //= require react_ujs //= require flux //= require eventemitter //= require components //= require app //= require_tree .
app.js // var Constants = { CHANGE_EVENT: 'change', ADD_COMMENT: 'comments.add' }; var Store = new _.extend({}, EventEmitter.prototype, { _comments: [], addComment: function(comment) { this._comments[comment.id] = comment; }, comments: function() { return this._comments; }, addChangeListener: function(callback) { this.on(Constants.CHANGE_EVENT, callback); }, removeChangeListener: function(callback) { this.removeListener(Constants.CHANGE_EVENT, callback); }, emitChange: function() { this.emit(Constants.CHANGE_EVENT); } }); var AppDispatcher = new FluxDispatcher(); AppDispatcher.register(function(payload) { var action = payload.actionType; switch(action) { case Constants.ADD_COMMENT: Store.addComment(payload.comment); Store.emitChange(); break; default: // NO-OP } }); // Actions var Actions = new _.extend({}, { addComment: function(params) { AppDispatcher.dispatch({ actionType: Constants.ADD_COMMENT, comment: params }); } });
comment_list.js.jsx var CommentList = React.createClass({ componentDidMount: function() { Store.addChangeListener(this._onChange); }, componentWillUnmount: function() { Store.removeChangeListener(this._onChange); }, render: function() { console.log('rendering'); return ( <div> {[].map(function(comment) { return <Comment key={comment.id} {... comment} />; })} </div> ); }, _onChange: function() { this.forceUpdate(); } }); //Actions var Actions = new _.extend({}, { addComment: function(params) { AppDispatcher.dispatch({ actionType: Constants.ADD_COMMENT, comment: params }) } });
show.html.erb <div class="row"> <h1>Title: <%= @post.title %></h1> </div> <div class="row"> <div class="col-md-6"> <p> <%= @post.description %> </p> </div> <div class="col-md-6"> <p>Comments:</p> <%= react_component('CommentList') %> </div> </div>
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