| How to add new Ruby environment in URU? Posted: 11 Dec 2016 08:13 AM PST I can register already installed a Ruby environment to URU by following command in terminal: uru admin add c:\ruby-2.2\bin
But, What is the way to install another ruby version in URU along existing one? |
| Rails: Attribute and method for two unrelated classes: Best DRY approach? Posted: 11 Dec 2016 07:53 AM PST This is an almost trivial problem but I want to follow (and learn more about) Rails best practices, in particular the DRY principle. My app handles two unrelated classes, Countries and Places; both have an attribute name. In views, I use their name in titles etc., e.g. "Visit #{@country.name}". In most instances, that works. But some Countries and Places require "the" as a prefix. Example: "Visit Netherlands" sounds clunky and wrong, so it must be "Visit the Netherlands". Yet in lists and search results, it is supposed to be "Netherlands", without "the". If it were only one class that's affected, I would - add a boolean column
prefix to its table - add a method called
name_prefixed(uppercase=false) that would take name and, if prefix is true, prepend "the"/"The" (depending on the value of uppercase) - replace
@country.name with @country.name_prefixed where applicable However, since the issue exists with two unrelated classes, how would I best take care of this without repeating myself? |
| What is the best alternative for an application with multiple accesses to the database in Rails? Posted: 11 Dec 2016 07:20 AM PST I have some client applications that will make several restfull calls per second to my Rails application. My restful service will basically be, find a user by id and update their data. But this will be done many times per second. I am studying sql-caching and background jobs, but as I have little experience I do not know if this would solve my problem. Thanks for the help. |
| Rails - is it possible to redirect to a custom path with params? Posted: 11 Dec 2016 07:35 AM PST So I am making an authorisation system. A new registration page is set to be '/signup'. If registration is invalid (username has already been taken, password too short), I want to show the errors. When I do it like this: @user = User.create(user_params) if @user.save session[:user_id] = @user.id redirect_to stories_path, notice: "Thanks for registration!" else render 'new' end
it works, but it renders in '/users' instead of '/signup'. And when instead of render 'new' I write redirect_to '/signup' it redirects, but errors are not shown. Is it possible to redirect to '/signup' and keep the errors? user.rb: class User < ActiveRecord::Base has_secure_password validates :username, presence: true, :uniqueness => { :case_sensitive => false } validates :password, presence: true, :length => {minimum: 6} end
users_controller.rb: class UsersController < ApplicationController def new @user = User.new end def create @user = User.create(user_params) if @user.save session[:user_id] = @user.id redirect_to stories_path, notice: "Thanks for registration!" else render 'new' end end private def user_params params.require(:user).permit(:username, :password) end end
new.html.erb: <h3>New registration</h3> <%= simple_form_for @user do |f| %> <div> <%= f.input :username %> <%= f.error :username %></div> <div><%= f.input :password %> <%= f.error :password %></div> <%= f.button :submit %> <% end %>
and routes.rb: Rails.application.routes.draw do root 'stories#index' resources :stories resources :users get 'signup' => 'users#new' end
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| Redirect from Rails controller after Angular POST Posted: 11 Dec 2016 07:51 AM PST I have a normal Rails app (no SPA) and on one page only I'm using Angular.
At the end I'm sending a POST to the server with the form data (and it is working) and as the final step of the POST I'd like to redirect to another page. Rails controller is like this: def save data = params[:data] respond_to do |format| format.js { render :js => "window.location.href = '/products';" } end end
But nothing is happening. My Angular post is simple: app.service('httpService', ['$http', function($http) { this.post = function(data) { $http({ method : 'POST', url : '/cart/save', data : { data: data }, headers : {'Content-Type': 'application/json'} }); }; }]);
Calling service just like this, no promises: this.save = function(ids) { httpService.post(ids); };
Any ideas? Thanks. EDIT:
I have tried also change the mime-type to 'application/javascript', but no success: app.service('httpService', ['$http', function($http) { this.post = function(data) { $http({ method : 'POST', url : '/cart/save', data : { data: data }, headers : {'Content-Type': 'application/javascript'} }); }; }]);
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| Strange issue with setting custom foreign_key Posted: 11 Dec 2016 08:02 AM PST From the documentation I read that: class Book < ApplicationRecord belongs_to :author, class_name: "Patron", foreign_key: "patron_id" end
so according to that I'm trying the next: class Choco < ActiveRecord::Base has_many :kinds, inverse_of: :choco, foreign_key: :myhash
and class Kind < ActiveRecord::Base belongs_to :choco, foreign_key: :myhash
But instead it pastes in that column NULL and I cannot understand why. Schema For Choco: — (id, title, myhash)
For Kind: — (id, choco_id, title)
I want to paste myhash on choco_id field on creating a new kind. What is the problem? |
| Cucumber can not find the input or select the dropdown box well Posted: 11 Dec 2016 06:48 AM PST As usual, I use the fire-path to locate the element of my web application. However, my testing framework is cucumber+capybara. My web application is based on ruby on rails. Capybara support some high level keyword to do web application testing like "click_on", "select", "fill_in" and so on. The problems I met are: One drop-down box id is "product_id" and one value is "TEST" However, the code like 'select "TEST", :from => "product_id' can not work. The step is passed, but the selection is not changed as expected. one input '', I try to 'fill_in "clone-input", :with => "hello" but cucumber output one error like no filed 'clone-input' found. some my cucumber & capabara & rails gem versions are: cucumber (2.4.0) cucumber-api-steps (0.13) cucumber-core (1.5.0) cucumber-rails (1.4.5) cucumber-wire (0.0.1) capybara (2.0.3) jquery-rails (3.1.4) pry-rails (0.3.4) rails (3.2.22.2) rails-dom-testing (2.0.1) rails-html-sanitizer (1.0.3) rails-observers (0.1.2) rails_autolink (1.1.4) How to fix the two issues? the fire-path can get the xpath, but the cucumber can not find them? why? |
| Rails 4: how to redirect_to a subdomain action Posted: 11 Dec 2016 06:55 AM PST In my rails 4 application I am trying to redirect to a controller action which is routed to a subdomain while passing some parameters to it. Here is what works, but what needs some improvement: redirect_to "http://subdomain.lvh.me:3000/build"
As you can see, currently no paramters get passed to that url.
I'd like to pass (id: params[:id]).
I am wondering if there is a way to do this with the pathfinder as I am trying to access a subdomain action from my main domain. |
| Rails 5: link value from has_many table to belongs_to by ID Posted: 11 Dec 2016 07:13 AM PST I have has_many / belongs_to relationship: models/media/media.rb module Media class Media < ApplicationRecord has_many :positions, dependent: :destroy, inverse_of: :media, class_name: 'Position::Position' end
In Media::Media I have column name models/position/position.rb module Position class Position < ApplicationRecord belongs_to :media, optional: true, inverse_of: :position, class_name: 'Media::Media', foreign_key: 'media_id' end
In Position::Position I have column media_id. I'm a bit stuck with relatively simple thing: how to show Media name for each position? Thank you for any help! I'm on Rails 5 and Postgresql 9.5. Update In console I try this: Position::Position.joins(:media).where(media_id: :id).select(:name) however I get this error: (Object doesn't support #inspect) |
| Testing mailer/ contact Posted: 11 Dec 2016 06:49 AM PST I created a movie review website which allows a logged in user to add, edit and delete a movie as well as leave reviews for each movie. I have also implemented a mailer for my contact form that sends a 'fake email' (displayed on the console only). This is my first time working with Ruby so I am unsure on how to test my controller and method for contacts. Any form of advice will be much appreciated. contacts_controller.rb: class ContactsController < ApplicationController def new @contact = Contact.new end def create @contact = Contact.new(params[:contact]) @contact.request = request if @contact.deliver flash.now[:notice] = 'Thank you for your message. We will contact you soon!' else flash.now[:error] = 'Cannot send message.' render :new end end end
contact.rb: class Contact < MailForm::Base attribute :name, :validate => true attribute :email, :validate => /\A([\w\.%\+\-]+)@([\w\-]+\. attribute :message attribute :nickname, :captcha => true # Declare the e-mail headers. It accepts anything the mail method # in ActionMailer accepts. def headers { :subject => "My Contact Form", :to => "your_email@example.org", :from => %("#{name}" <#{email}>) } end end
routes: contacts GET /contacts(.:format) contacts#new POST /contacts(.:format) contacts#create new_contact GET /contacts/new(.:format) contacts#new
My testing so far: require 'test_helper' class ContactsControllerTest < ActionController::TestCase include Devise::Test::ControllerHelpers test "should get contact" do get :new assert_response :success end end
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| rails project#index don't display user projects - Many to Many association Posted: 11 Dec 2016 05:53 AM PST I try to create app like this : An user can create a project, and invite many members to this project. Right now, I try to display all projects created by the user with projects#index method on projects_controller.rb. But, on browser, on /projects links, I don't have any errors, and don't have projects. Here is my code, projects_controller.rb : def index @user = current_user @projects = @user.projects end def create @project = Project.new(project_params) @project.user_id = current_user.id if @project.save flash[:success] = "successfully created project" redirect_to projects_path else render 'new' end end
Here is models (user, project, membership, invite) : class Invite < ApplicationRecord belongs_to :project belongs_to :sender, :class_name => 'User' belongs_to :recipient, :class_name => 'User' before_create :generate_token before_save :check_user_existence def generate_token self.token = Digest::SHA1.hexdigest([self.project_id, Time.now, rand].join) end def check_user_existence recipient = User.find_by_email(email) if recipient self.recipient_id = recipient.id end end end class User < ApplicationRecord has_many :memberships has_many :projects, through: :memberships has_many :invitations, :class_name => 'Invite', :foreign_key => 'recipient_id' has_many :sent_invites, :class_name => 'Invite', :foreign_key => 'sender_id' # Include default devise modules. Others available are: # :confirmable, :lockable, :timeoutable and :omniauthable devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable end class Project < ApplicationRecord has_many :memberships has_many :users, through: :memberships has_many :invites end class Membership < ApplicationRecord belongs_to :user belongs_to :project end
And here is the view where I want to display user.projects : <div class="container"> <h3> All your projects </h3> <% @projects.each do |project| %> <div class="project-card"> <div class="card-title"> <%= link_to project.title, project_path(project) %> </div> </div> <% end %> </div>
Maybe you want to see the schema : ActiveRecord::Schema.define(version: 20161211133001) do create_table "invites", force: :cascade do |t| t.string "email" t.integer "project_id" t.integer "sender_id" t.integer "recipient_id" t.string "token" t.datetime "created_at", null: false t.datetime "updated_at", null: false end create_table "memberships", force: :cascade do |t| t.datetime "created_at", null: false t.datetime "updated_at", null: false t.integer "user_id" t.integer "project_id" t.index ["project_id"], name: "index_memberships_on_project_id" t.index ["user_id"], name: "index_memberships_on_user_id" end create_table "projects", force: :cascade do |t| t.string "title" t.integer "nb_team" t.datetime "created_at", null: false t.datetime "updated_at", null: false t.integer "user_id" end create_table "users", force: :cascade do |t| t.string "email", default: "", null: false t.string "encrypted_password", default: "", null: false t.string "reset_password_token" t.datetime "reset_password_sent_at" t.datetime "remember_created_at" t.integer "sign_in_count", default: 0, null: false t.datetime "current_sign_in_at" t.datetime "last_sign_in_at" t.string "current_sign_in_ip" t.string "last_sign_in_ip" t.datetime "created_at", null: false t.datetime "updated_at", null: false t.index ["email"], name: "index_users_on_email", unique: true t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true end end
Thank you ! |
| Devise. List of logged in Posted: 11 Dec 2016 05:43 AM PST Using devise for user login. Need to display list of currently signed in users. Have tried smth like: User.find(0).user_signed_in?
in the loop. Getting errors |
| Grey out div from toggle switch Posted: 11 Dec 2016 06:04 AM PST I am trying to to grey out a div based on whether a toggle is active(checked) or not. The js seems to be triggering when I select the toggle though the div isn't being faded out Slim Template - @products.each do |product| .mdl-cell.mdl-cell--4-col.item-border.mdl-shadow--2dp .mdl-cell.mdl-cell--1-col.mdl-cell--10-offset label.mdl-switch.mdl-js-switch.mdl-js-ripple-effect for=product.name input.mdl-switch__input checked="checked" type="checkbox" id=product.name / span.mdl-switch__label .mdl-cell.mdl-cell--12-col h4.teal-heading= product.name - @properties.each do |property| .mdl-cell.mdl-cell--12-col .mdl-textfield.mdl-js-textfield.mdl-textfield--floating-label.mdl-cell.mdl-cell--12-col input.mdl-textfield__input type="text" id=property.id label.mdl-textfield__label for=property.id = "#{property.name } Price"
Jquery $('.mdl-switch__input').click(function(){ $(this).parent('.mdl-cell--4-col').$(this).fadeTo(500, 0.2); });
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| Showing dynamically content in an efficient way, without using different template for every situation Posted: 11 Dec 2016 05:24 AM PST Best explained with an example: Lets say I have many records, which I want to display in an html table. The columns which are shown are chosen before hand. In this case, user name (if @options[:user_name]) user email (if @options[:user_email]) sms phone (if @options[:user_email]) add new task (only if admin is not spectator) Point is there are many different dynamic variables which decides which columns to show- Now this isn't a problem for the table header thead but It is a waste to ask the same questions and getting the same answers for every record (user)- there must be a better way. I know I need to display the user_name, I don't want to ask if I need to for every user. But I can't make a different template for every combination of options etc'. <table> <thead> <tr> <th>#</th> <%= content_tag :td, 'User Name' if @options[:user_name] %> <%= content_tag :td, 'User Email' if @options[:user_email] %> <%= content_tag :td, 'Sms Phone' if @site.include_phone? %> <% if admin? %> <th>Actions</th> <% end %> </tr> </thead> <tbody> <% @many_users.each.with_index(1) do |user, index| %> <tr> <td><%= index %>. </td> <%= content_tag :td, user.name if @options[:user_name] %> <%= content_tag :td, user.get_email_from_db(@options[:admin]) if @options[:user_name] %> <%= content_tag :td, @site.get_phone(user) if @site.include_phone? %> <td class="actions"> <%= link_to new_task_path(user_id: user.id) do %>new task<% end unless admin_is_spectator? %> </td> </tr> <% end %> </tbody> </table>
To summarize: How do I avoid asking the same ifs questions for which I know the answer before hand for every record? |
| How to format model ID in Rails? Posted: 11 Dec 2016 05:43 AM PST In Rails, How can I format output of model ID(auto increment primary key) from "12" to something like this "INV000012" Thank you in advance. |
| Character count for text_area Posted: 11 Dec 2016 04:58 AM PST As I was trying to include a character count on my up I stumbled into this problem. Whilst I have managed to get it to display on my page I cannot see any number next to Character remaining, why is that happening? Model validates :project_description, presence: true, length: {minimum: 200 ,maximum: 850}
Controller def new @project = Project.new @maximum_length = Project.validators_on( :project_description ).first.options[:maximum] end
Form <%= form_for(@project, html: { multipart: true }) do |f| %> <%= render 'shared/error_messages', object: f.object %> <%= f.text_area :project_description, placeholder: "In between 200 to 850 characters" %> Chars remaining: <span id="counter" data-maximum-length="<%= @maximum_length %>"><%= @maximum_length %></span> <br> <span class="picture"> <%= f.label "Project banner (optional)" %> <%= f.file_field :picture, accept: 'image/jpeg,image/gif,image/png' %> </span> <br> <%= f.submit "Create", class: "btn btn-primary" %> <% end %> </div> </div> <script type="text/javascript"> $('#project_picture').bind('change', function() { var size_in_megabytes = this.files[0].size/1024/1024; if (size_in_megabytes > 5) { alert('Maximum file size is 5MB. Please choose a smaller file.'); } }); $(document).ready(function() { var project_description = $("#project_description"); var counter = $("#counter"); var maximum_length = counter.data("maximum-length"); project_description.keyup(function() { counter.text(maximum_length - $(this).val().length); }); }); </script>
There are no errors on the page and the console appears to render everything okay, any thoughts? Thank you! |
| Rails Source Code - why wrapping class inside a class? Posted: 11 Dec 2016 06:12 AM PST I'm reading rails source code, and I can see in some code, instead of using the class directly, it's creating a sub-class. Example code: # activesupport/lib/active_support/execution_wrapper.rb class RunHook < Struct.new(:hook) # :nodoc: def before(target) hook_state = target.send(:hook_state) hook_state[hook] = hook.run end end # railties/lib/rails/application.rb def initialize # some code.. @executor = Class.new(ActiveSupport::Executor) @reloader = Class.new(ActiveSupport::Reloader) # some more code end
My questions is.. why it's needed use a subclass? Why not just use the class / struct directly? Thanks. Update: I've figured out the reason for the second example, it's because that ActiveSupport::Executor defines inherited methdod: class << self # :nodoc: attr_accessor :active end def self.inherited(other) # :nodoc: super other.active = Concurrent::Hash.new end
so whoever extends the class, would have active attribute defined with a new Concurrent::Hash. However, I still don't quite understand why Struct needs to be extended. |
| Rails, Models, and "Projects" scoping Posted: 11 Dec 2016 06:29 AM PST I'm using Rails 5.0.0.1 and a custom authentication/authorization system (similar to Devise/CanCan). I'm working on a Rails app and I'm looking for some advice on how to show/hide data based on whether or not a user is part of a "group" or "project". The app: basically, users can "highlight" lines of a text article. They are first presented with a view of the article's contents (i.e., an index of its lines). They can select a line to highlight. When a line has been highlighted, any user can click on it to bring up a comments section for that line. Article has_many Lines Line has_many Highlights Highlight has_many Comments User has_many Highlights User has_many Comments Highlight belongs_to User Comments belongs_to Highlight Comments belongs_to User
Now I would like to add "Group Project" functionality. A user selects an article to use in a Group Project. He invites other users to this project. Invited users can highlight and comment, but all the highlights and comments are only visible to users of that project. My idea was to create 'scope'. By default, for all articles, highlights, and comments, the scope is 'public'. Any user can log in and view those articles, highlights, comments. But a user can also access one of his Group Projects and see (possibly the same) articles with 'privately' scoped highlights, comments, etc. This brings up the problem that a single Line can have multiple highlights and comments with different scopes. An article's line's highlights/comments have a single public version and multiple private versions. My question is how can I efficiently deal with these multiple instances? Should I create new instances of the Lines for each project? This seems like unnecessary duplication in the database. Should I put some conditional in the controller or model to scope based on project_id or something similar? I know there are multiple gems for dealing with "user groups", but they are typically used for authorization. I would like for a user to be able to create any number of projects, which each have their own invitees and highlights and comments. |
| save several data with single submit Posted: 11 Dec 2016 04:19 AM PST i have three models: 1) Product class Product < ApplicationRecord has_many :orders end
2) Shop class Shop < ApplicationRecord belongs_to :rayon has_many :orders end
3) Order class Order < ApplicationRecord belongs_to :product belongs_to :shop end
The Product model has these attributes: - product_name
- product_type (With Ketchup / With Mayonnaise)
- product_size (Big / Small)
- expiration_date
Abbreviations for the table (= HTML ) which is used to take orders: - BSM => Big Sandwich with Mayonnaise
- BSK => Big Sandwich with Ketchup
- SSM => Small Sandwich with Mayonnaise
SSK => Small Sandwich with Ketchup **qty => quantity <table border="1"> <tr> <th>Shop List</th> <th>BSM</th> <th>BSK</th> <th>SSM</th> <th>SSK</th> </tr> <tr> <td>Shop Name</td> <td>qty</td> <td>qty</td> <td>qty</td> <td>qty</td> </tr> Next shop, next order Etc... </table>
My question is how can I submit all these orders with single click in rails? I hope, my question is clear. Thanks in advance. |
| No route matches Posted: 11 Dec 2016 05:31 AM PST Background I have created a movie review app that allows a logged in user to add and edit a movie as well as leave a review for each movie. Problem I am working on testing my controllers, however I keep getting: 3) Error: ReviewsControllerTest#test_should_get_edit: ActionController::UrlGenerationError: No route matches {:action=>"edit_movie_review", :controller=>"reviews"} test/controllers/reviews_controller_test.rb:34:in `block in <class:ReviewsControllerTest>' 4) Error: ReviewsControllerTest#test_should_get_new: ActionController::UrlGenerationError: No route matches {:action=>"new", :controller=>"reviews"} test/controllers/reviews_controller_test.rb:17:in `block in <class:ReviewsControllerTest>' 5) Error: ReviewsControllerTest#test_should_show_review: ActionController::UrlGenerationError: No route matches {:action=>"show", :controller=>"reviews", :id=>"1"} test/controllers/reviews_controller_test.rb:29:in `block in <class:ReviewsControllerTest>' 6) Error: ReviewsControllerTest#test_should_create_review: ActionController::UrlGenerationError: No route matches {:action=>"create", :controller=>"reviews", :review=>{:comment=>"MyText", :rating=>"1"}} test/controllers/reviews_controller_test.rb:23:in `block (2 levels) in <class:ReviewsControllerTest>' test/controllers/reviews_controller_test.rb:22:in `block in <class:ReviewsControllerTest>'
Rake routes: POST /movies/:movie_id/reviews(.:format) reviews#create new_movie_review GET /movies/:movie_id/reviews/new(.:format) reviews#new edit_movie_review GET /movies/:movie_id/reviews/:id/edit(.:format) reviews#edit movie_review GET /movies/:movie_id/reviews/:id(.:format) reviews#show PATCH /movies/:movie_id/reviews/:id(.:format) reviews#update PUT /movies/:movie_id/reviews/:id(.:format) reviews#update DELETE /movies/:movie_id/reviews/:id(.:format) reviews#destroy movies GET /movies(.:format) movies#index POST /movies(.:format) movies#create new_movie GET /movies/new(.:format) movies#new edit_movie GET /movies/:id/edit(.:format) movies#edit movie GET /movies/:id(.:format) movies#show PATCH /movies/:id(.:format) movies#update PUT /movies/:id(.:format) movies#update
ReviewsControllerTest: require 'test_helper' class ReviewsControllerTest < ActionController::TestCase setup do @review = reviews(:one) @user = users(:one) end test "should get index" do get :index assert_response :success assert_not_nil assigns(:review) end test "should get new" do get :new assert_response :success end test "should create review" do assert_difference('Review.count') do post :create, review: { comment: @review.comment, rating: @review.rating } end assert_redirected_to review_path(assigns(:review)) end test "should show review" do get :show, id: @review assert_response :success end test "should get edit" do get :edit_movie_review, @review assert_response :success end test "should update review" do put :update assert_redirected_to review_path(assigns(:review)) end test "should destroy review" do assert_difference('Review.count', -1) do delete :destroy, id: @review end assert_redirected_to reviews_path end end
ReviewsController.rb: class ReviewsController < ApplicationController before_action :find_movie before_action :find_review, only: [:edit, :update, :destroy] before_action :authenticate_user!, only: [:new, :edit] def new @review = Review.new end def create @review = Review.new(review_params) @review.user_id = current_user.id @review.movie_id = @movie.id if @review.save #if a review is succesfully saved, redirect user to home redirect_to movie_path(@movie) else render 'new' end end def edit end def update if @review.update(review_params) redirect_to movie_path(@movie) else render 'edit' end end def destroy @review.destroy redirect_to movie_path(@movie) end private def review_params params.require(:review).permit(:rating, :comment) end def find_movie @movie = Movie.find(params[:movie_id]) end def find_review @review = Review.find(params[:id]) end end
I am new to the world of programming therefore any form of advice is much appreciated. Thanks in advance! |
| AWS Rails install fails: activesupport requires Ruby version >= 2.2.2 Posted: 11 Dec 2016 04:08 AM PST I am installing rails 5 on aws. I have installed rvm and ruby. Ruby version I installed is 2.3.1. I have done bundle install. Now I am trying to install rails 5 by using command - 'sudo gem install rails --version 5.0.0' But I am getting error ERROR: Error installing rails: activesupport requires Ruby version >= 2.2.2.
rvm list =* ruby-2.3.1 [ x86_64 ]
Complete log on running command - 'sudo gem install rails --version 5.0.0' Fetching: i18n-0.7.0.gem (100%) Successfully installed i18n-0.7.0 Fetching: thread_safe-0.3.5.gem (100%) Successfully installed thread_safe-0.3.5 Fetching: tzinfo-1.2.2.gem (100%) Successfully installed tzinfo-1.2.2 Fetching: minitest-5.10.1.gem (100%) Successfully installed minitest-5.10.1 Fetching: concurrent-ruby-1.0.2.gem (100%) Successfully installed concurrent-ruby-1.0.2 Fetching: activesupport-5.0.0.gem (100%) ERROR: Error installing rails: activesupport requires Ruby version >= 2.2.2.
Why it is showing ruby version required >= 2.2.2 ? What should I do here? |
| Country code validation with ISO Posted: 11 Dec 2016 08:19 AM PST I have in my model country code field. How can I validate if it is correct with ISO standards ? |
| Ruby on Rails - First argument in form cannot contain nil or be empty in Posts#show Posted: 11 Dec 2016 02:33 AM PST I've been making a blog system in Rails while learning the basics of Rails. However, I have encountered an error: "First argument in form cannot contain nil or be empty" in Posts' "show" view, as I want the comment form to be below the contents of the post. I have tried every solution to the problem including browsing other people's responses on Stack Overflow, however so far to no avail. CommentsController.rb class CommentsController < ApplicationController def index @comments = Comment.all end def new @comment = Comment.new end def create @post = Post.find(params[:comment[:id]) @comments = @post.comments.create(params[:comment]) if @comments.save flash[:success] = "Your comment has been successfully created." redirect_to @post else flash[:danger] = "Oops! Something went wrong!" redirect_to @post end end def edit @comment = Comment.find(params[:id]) end def update @comment = Comment.find(params[:id]) if @comment.update_attributes flash[:success] = "Your comment has been successfully updated." redirect_to user_path else redirect_to user_path end end def destroy @comment = Comment.find(params[:id]) if @comment.destroy flash[:success] = "Your comment has been successfully deleted." redirect_to post_path else flash[:danger] = "Oops! Something went wrong. Try again." end end private def comment_params params.require(:comment).permit(:content) end end
show.html.erb (posts) <div class="show_post"> <div class="container"> <div class="col-lg-9 col-md-9 col-sm-12 col-xs-12 col-lg-offset-3 col-md-offset-3"> <h2 class="heading"> <%= @post.title %> </h2> <%= raw(@post.content) %> </div> <div class="col-lg-9 col-md-9 col-sm-12 col-xs-12 col-lg-offset-3 col-md-offset-3"> <h4> Liked this post? Add a comment below! </h4> <%= form_for(@comment) do |c| %> # Line that raises the error <% if @comment.errors.any? %> <div id="error_explanation"> <h2> <%= "#{pluralize(@comment.errors.count, "error")} errors were detected in your form:" %> </h2> <ul> <% @comment.errors.full_messages.each do |message| %> <li> <%= message %> </li> <% end %> </ul> </div> <% end %> <div class="form-group"> <%= c.label :content, "Your comment goes here: " %> <%= c.cktext_area :content, rows: 10, class: "form-control" %> </div> <div class="form-group"> <%= c.submit "Add Comment", class: "btn btn-primary" %> </div> <% end %> </div> <div class="col-lg-9 col-md-9 col-sm-12 col-xs-12 col-lg-offset-3 col-md-offset-3"> <h3> Comments: </h3> <% if @comments && @comments.any? %> <% @comments.each do |comment| %> <%= raw(comment.content) %> <% end %> <% end %> </div> </div>
routes.rb Rails.application.routes.draw do root 'pages#home' get 'help' => 'pages#help' get 'contact' => 'pages#contact' get '/index' => 'users#index' get '/signup' => 'users#new' post '/users' => 'users#create' get '/show' => 'users#show' get '/login' => 'sessions#new' post '/login' =>'sessions#create' get '/logout' => 'sessions#destroy' get '/new_post' => 'posts#new' post '/new_post' => 'posts#create' get '/show_post' => 'posts#show' get '/delete_post' => 'posts#destroy' resources :users resources :posts resources :comments
I'm still a n00b in Rails, so I need help with solving this issue. Thanks in advance. |
| why is session not being set sometimes? Posted: 11 Dec 2016 06:52 AM PST I have a simple join room code for a multiplayer game. The image below is the index page where the user first needs to type a name and then join the room. 
Here two people join the room. One client is a chrome and another client is firefox. I did it so that two different sessions could be created. 
After clicking join by both clients both click on join and they are taken to startgame page as shown below. The image below is a success scenerio since they both display their respective ids. 
Most of the times, one id is missing. The error view is shown in the following image. I am wondering why is the id missing for one user or in other words why is the session not being set for one user. I have included below all the code of this simple application. I have been stuck on this issue for a while now so i am finally turning to stackoverflow for some directions. I appreciate your help a lot! Thanks! Often times the case is as follows. One id is missing for one client or user.  The code is as follows:
class HelloController < ApplicationController def index end def userCount render plain: User.count end def join n = params[:name] u = User.create(name: n) session[:current_user_id] = u.id render plain: User.count end def startGame @my_id = session[:current_user_id] end end
The view files are as follows: Index page(First page) index.html.erb <label> Status: </label> <span id="status"> </span> <br> <br> <input type="text" id="name"> </input> <button id="join"> Join </button> <br> <button id="enterroom"> Enter Room </button> <script> var refreshId = setInterval(function() { $.get( "/userCount", function( data ) { $('#status').text(data); }); }, 1000); $( "#join" ).click(function() { $.post( "/join", { name: $('#name').val() }) .done(function( data ) { }); }); $( "#enterroom" ).click(function() { window.location.replace("/startGame"); }); </script>
The page after join is complete startGame.html.erb <h1> Ok game has started... </h1> <br> <h1> My id is <%= @my_id %> </h1>
schema.rb ActiveRecord::Schema.define(version: 20161211055722) do create_table "users", force: :cascade do |t| t.string "name" t.datetime "created_at", null: false t.datetime "updated_at", null: false end end
Routes Rails.application.routes.draw do root 'hello#index' get '/userCount' => 'hello#userCount' post '/join' => 'hello#join' get '/startGame' => 'hello#startGame' end
UPDATE: ok if i comment the following code in index.html.erb then the ids are generated everytime for both users. So, looks like the culprit is this section of code but i am confused why this is the case. The following code in index file is responsible for updating the total user count every 1 second. Could it be that when join is clicked a post request is prepared but this get call will intercept that call or void that call? Thanks! /* var refreshId = setInterval(function() { $.get( "/userCount", function( data ) { $('#status').text(data); }); }, 1000); */
UPDATE2: Ok i have verified that the session is being set in the join method but before the startGame method is executed, the session or session[:current_user_id] is being reset. I am wondering why is the session being reset at some point after the session is successfully set. Thanks! UPDATE3: class User < ApplicationRecord end
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| Capybara resets devise session after each request Posted: 11 Dec 2016 12:44 AM PST Code example: login_as(user, scope: :user) visit user_edit_path #this is authorized # some expectations visit user_comments_path #this is not authorized, return 401, why?
But if I add second login_as after first visit - everything works. I don't know why devise session reseted. When I try to login through the login form via fill_in and click_on 'Log in', session reseted after redirect to root_path! So in that case i can't do even basic expectations that user was logged in. I tested on the different drivers. Rspec configuration file: # This file is copied to spec/ when you run 'rails generate rspec:install' ENV['RAILS_ENV'] ||= 'test' require File.expand_path('../../config/environment', __FILE__) # Prevent database truncation if the environment is production abort('The Rails environment is running in production mode!') if Rails.env.production? require 'spec_helper' require 'rspec/rails' require 'capybara/rspec' require 'capybara/poltergeist' # NOTE: For Chrome support Capybara.register_driver :selenium do |app| Capybara::Selenium::Driver.new(app, :browser => :chrome) end # Capybara.register_driver(:poltergeist) { |app| Capybara::Poltergeist::Driver.new(app, js_errors: false) } # Capybara.javascript_driver = :poltergeist Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f } # Checks for pending migration and applies them before tests are run. # If you are not using ActiveRecord, you can remove this line. ActiveRecord::Migration.maintain_test_schema! RSpec.configure do |config| config.include FactoryGirl::Syntax::Methods config.include WaitForAjax config.include FeatureHelpers config.include Devise::TestHelpers, type: :controller config.include Warden::Test::Helpers config.extend ControllerHelpers, type: :controller # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures config.fixture_path = "#{::Rails.root}/spec/fixtures" # If you're not using ActiveRecord, or you'd prefer not to run each of your # examples within a transaction, remove the following line or assign false # instead of true. config.use_transactional_fixtures = false # RSpec Rails can automatically mix in different behaviours to your tests # based on their file location, for example enabling you to call `get` and # `post` in specs under `spec/controllers`. # # You can disable this behaviour by removing the line below, and instead # explicitly tag your specs with their type, e.g.: # # RSpec.describe UsersController, :type => :controller do # # ... # end # # The different available types are documented in the features, such as in # https://relishapp.com/rspec/rspec-rails/docs config.infer_spec_type_from_file_location! # Filter lines from Rails gems in backtraces. config.filter_rails_from_backtrace! # arbitrary gems may also be filtered via: # config.filter_gems_from_backtrace("gem name") config.before :suite do Warden.test_mode! end end
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| How to authorize namespace, model-less controllers using CanCanCan? Posted: 11 Dec 2016 12:17 AM PST What is the correct way to authorize and check abilities for a namespaced, model-less controller using CanCanCan? After much googling and reading the wiki, I currently have #controllers/namespaces/unattacheds_controller.rb def Namespaces::UnattachedsController authorize_resource class: false def create # does some stuff end end #models/ability.rb def admin can [:create], :namespaces_unattacheds end #view/ <%= if can? :create, :namespaces_unattacheds %> # show a create form to authorized users <% end %>
This is not correctly authorizing the controller. Admins can see the conditional create form, but are not authorized to post to the create action. post :create, valid_params Failure/Error: { it { expect( flash ).to have_content "Successfully created" } expected to find text "Successfully created" got: "You are not authorized to access this page."
In one example, the wiki suggests creating a separate Ability class for a namespaced controller. https://github.com/CanCanCommunity/cancancan/wiki/Admin-Namespace Is there a simpler way to achieve this? This app uses many namespaced controllers, I don't really want to create an ability class for each one. Is there correct syntax to refer to the namespaced controller in the Ability class? can [:create], Namespaces::Unattacheds can [:create], :namespaces_unattacheds can [:create], namespaces/unattacheds ????
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| Ruby on Rails: save files in google drive Posted: 10 Dec 2016 11:53 PM PST I have a Ruby on Rail project but i need save files in an other folder, actually it is saving in a project default folder and the source is "app/public/system/.." I'm trying save the files in google drive folder and i use: (this is my gemfile resume) gem 'paperclip', '~> 5.1.0' gem 'paperclip-googledrive-new' gem 'google-api-client', '0.7.1', require: 'google/api_client'
i did the following instructions to save my files: https://github.com/shoaibmalik786/paperclip-googledrive-new My model is some like this: has_attached_file :banner, :storage => :google_drive, :google_drive_credentials => "#{Rails.root}/config/google_drive.yml", :google_drive_options => { :public_folder_id => "0BxckPDmdZqdpYWgzbnVwUEhPVVU", :default_image => "missing.png", :path => proc { |style| "#{style}_#{id}_#{banner.original_filename}" } }
i did the rake google_drive:authorize and didn't have errors and in my google_drive.yml i have the result.. is this : client_id: <%= ENV["154813271628..."] %> client_secret: <%= ENV["mOfV5821kUY..."] %> access_token: <%= ENV["ya29.GlutA7bKMLwkHs6rXFYU92vZG..."] %> refresh_token: <%= ENV["1/rAuECXRz..."] %>
Also i used "active_admin" in my aplication The actually error in the aplication is this: 
Thx for any help or more information |
| Whenever gem with cron or Resque gem for running tasks in rails Posted: 11 Dec 2016 01:33 AM PST I have a stock portfolio app that gets financial data from Yahoo Finance. I want to set up a feature that will calculate the portfolio's value (which will involve sending a get request to yahoo for all of the relevant stock prices and calculating the price * quantity and save that in the amount attribute of a portfolio object). I have a valuation model (that belongs_to a portfolio) that will be used to create valuation instances that will store the portfolio amount and date every day. I will then plot the portfolio's valuations on a graph to track the performance of it's stock picks. I only want to run this once a day at the end of the day. As it stands now, I am thinking of simply using the whenever gem to schedule a task and run the above actions to fetch and calculate prices. Could this be a good use case for a background processing framework like Resque? |
| Heroku ActionController::Routing Error Posted: 10 Dec 2016 11:45 PM PST Im getting a strange routing when on Heroku but not locally, and I have no idea how to proceed with it. this is the error: ActionController::RoutingError (No route matches [GET] "/authors/posts/this-is-just-a-test/publish"): Routes: new_author_session GET /authors/sign_in(.:format) devise/sessions#new author_session POST /authors/sign_in(.:format) devise/sessions#create destroy_author_session DELETE /authors/sign_out(.:format) devise/sessions#destroy author_password POST /authors/password(.:format) devise/passwords#create new_author_password GET /authors/password/new(.:format) devise/passwords#new edit_author_password GET /authors/password/edit(.:format) devise/passwords#edit PATCH /authors/password(.:format) devise/passwords#update PUT /authors/password(.:format) devise/passwords#update root GET / blog/posts#index edit_author GET /author/:id/edit(.:format) author#edit author GET /author/:id(.:format) author#show PATCH /author/:id(.:format) author#update PUT /author/:id(.:format) author#update publish_authors_post PUT /authors/posts/:id/publish(.:format) authors/posts#publish unpublish_authors_post PUT /authors/posts/:id/unpublish(.:format) authors/posts#unpublish authors_posts GET /authors/posts(.:format) authors/posts#index POST /authors/posts(.:format) authors/posts#create new_authors_post GET /authors/posts/new(.:format) authors/posts#new edit_authors_post GET /authors/posts/:id/edit(.:format) authors/posts#edit authors_post GET /authors/posts/:id(.:format) authors/posts#show PATCH /authors/posts/:id(.:format) authors/posts#update PUT /authors/posts/:id(.:format) authors/posts#update DELETE /authors/posts/:id(.:format) authors/posts#destroy about GET /about(.:format) blog/pages#about contact GET /contact(.:format) blog/pages#contact write GET /write(.:format) blog/pages#write posts GET /posts(.:format) blog/posts#index post GET /posts/:id(.:format) blog/posts#show
post.rb class Post < ApplicationRecord extend FriendlyId friendly_id :title, use: :slugged belongs_to :author scope :most_recent, -> {order(published_at: :desc)} scope :published, -> {where(published: true)} def should_generate_new_friendly_id? title_changed? end def published_date "Published on #{created_at.strftime("%-b, %-d, %-Y")}" end end
routes.rb devise_for :authors root to: 'blog/posts#index' resources :author, only: [:show, :edit, :update] namespace :authors do resources :posts do put 'publish' => 'posts#publish', on: :member put 'unpublish' => 'posts#unpublish', on: :member end end scope module: 'blog' do get 'about' => 'pages#about', as: :about get 'contact' => 'pages#contact', as: :contact get 'write' => 'pages#write', as: :write get 'posts' => 'posts#index', as: :posts get 'posts/:id' => 'posts#show', as: :post end
Following this post did not fix it. |
| Ruby on Rails 5: redirect_to giving url and path Posted: 11 Dec 2016 01:04 AM PST I am building a rails 5 web app. Everything is working great on my localhost development environment. I have a Digital Ocean dropplet (running Ubuntu 14.04, nginx/puma, and mySql). As per the normal sequence, after one logs in, I redirect to the root_path. Again on my localhost environment, this works as expected, but on the remote host (still under development environment) the redirect_to function gives both the url and the path. here is my login controller code: class SessionController < ApplicationController def login user = User.find_by_uname params[:uname] if user.present? @user = user.authenticate(params[:password]) if @user.present? puts "@user present" session[:userid] = @user.id session[:uname] = @user.uname @modal = 'login' redirect_to root_path else puts "@user did not authenticate -- wrong password" end else puts "#{params[:uname]} not in database." render partial: 'utility/loginfailure', as: :js end end end
in the log/development.log file I see this: Redirected to http://ruby.morgotha.net, ruby.morgotha.net/ From that it would seem to be coming from the redirect method, but it works fine on localhost dev. I am not sure how to troubleshoot this anymore. So if someone is willing to guide me on digging into this a bit deeper, I sure would appreciate it. Edit I changed the session controller to not need the return statement. The problem is still happening. root_path resolves to just "/". |
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