| Cohort analysis using pgsql/activerecord Posted: 28 Jun 2016 07:57 AM PDT I'm performing a cohort analysis on a single table messages. I need to calculate the retention rates of users that created a message (day_0), also created a message on the following day, day after, etc (day_1, day_2, etc). I was previously doing most of the processing post-query in ruby iterations. Now I have larger tables to deal with. It's way too slow and memory intensive in ruby so I need to offload the heavy lifting to the DB. I've also tried the cohort_me gem and experienced poor performance. I don't have much experience with SQL w/out activerecord. Here's what I have so far: SELECT date_trunc('day', messages.created_at) as day, count(distinct messages.user_id) as day_5_users FROM messages WHERE messages.created_at >= date_trunc('day', now() - interval '5 days') AND messages.created_at < date_trunc('day', now() - interval '4 days') GROUP BY 1 ORDER BY 1;
This returns the count of users who created messages five days ago. Now I need to find the count of THOSE users who created messages the following day, day after that, etc. until the current day. I need to perform this same analysis on different base days. So next instead of 5 days go, it starts the analysis at 4 days ago as the base day. Can this be done with one query? |
| Implementing .each in Wicegrid (Ruby on Rails) Posted: 28 Jun 2016 07:54 AM PDT I have the following column in my Wicegrid table, which iterates through the advisors of a student and lists them in the Wicegrid: g.column name: 'Student Advisor' do |user| res='' if user.advisors user.advisors.each do |advisor| advisor.username end end end
Wicegrid doesn't allow arrays to be returned inside their columns or at least that is what I understood from the error below: "When WiceGrid column block returns an array its second element is expected to be a hash containing HTML attributes for the tag." Is there another way to have the list of advisors in the table? |
| CSS animation not working in Rails app Posted: 28 Jun 2016 07:46 AM PDT So I have a button that I want to auto-hide when the user scrolls down the page and show when the user scrolls up. Below are the codes: application.js // This is a manifest file that'll be compiled into application.js, which will include all the files // listed below. // // Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts, // or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path. // // It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the // compiled file. // // Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details // about supported directives. // //= require jquery //= require jquery_ujs //= require bootstrap-sprockets //= require turbolinks //= require_tree . //= require jquery.infinitescroll
index.html.haml %a.scrollToTop{:href => "#"}
autohide.js $(document).ready(function(){ var prev = 0; var $window = $(window); var bar = $('.scrollToTop'); $window.on('scroll', function(){ var scrollTop = $window.scrollTop(); bar.toggleClass('hidden', scrollTop > prev); prev = scrollTop; }); });
application.css.scss /* *= require_tree . *= require_self */ // "bootstrap-sprockets" must be imported before "bootstrap" and "bootstrap/variables" @import "bootstrap-sprockets"; @import "bootstrap"; .scrollToTop{ width:70px; height:70px; background: #fff; font-weight: bold; position:fixed; bottom:20px; right:20px; border-radius:50%; box-shadow: 0 2px 5px rgba(0,0,0,0.12), 0 2px 4px rgba(0,0,0,0.24); -webkit-transform: translateZ(0); transition: transform 1s } .scrollToTop:hover{ box-shadow: 0 10px 20px rgba(0,0,0,0.25), 0 8px 8px rgba(0,0,0,0.22); -webkit-transition: all 0.4s ease-in-out; -moz-transition: all 0.4s ease-in-out; -o-transition: all 0.4s ease-in-out; transition: all 0.4s ease-in-out; } .scrollToTop.hidden{ transform: translateY(100px); }
The code works fine; the button does hide/show depending on the scroll direction. But the problem is, it doesn't animate i.e. it instantaneously hides and shows instead of sliding up and down. Any idea what's causing this? Thanks in advance! |
| Run a Rails job at precise time (accurate to the second) Posted: 28 Jun 2016 07:40 AM PDT I'm making an application that needs to run a job at extremely precise intervals of time (say 30 seconds, maximum acceptable delay is +-1 second). I'm currently doing so using an external Go application that polls an API endpoint built within my application. Is there a way that I could run the task on a worker machine (eg a Heroku dyno) with delays less than one second? I've investigated Sidekiq and delayed_job, but both have significant lag and therefore are unsuitable for my application. |
| omniauth instagram oauth2 code 400 Posted: 28 Jun 2016 07:34 AM PDT this is my gem file : gem 'omniauth-oauth2', '1.4' gem 'omniauth-instagram', github: 'ropiku/omniauth-instagram'
omniauth.rb file : Rails.application.config.middleware.use OmniAuth::Builder do provider :instagram, ENV['Client ID'], ENV['secret'] end
this is sesstion.rb class SessionsController < ApplicationController def new redirect_to '/auth/instagram/' end def create auth = request.env["omniauth.auth"] user = User.where(:provider => auth['provider'], :uid => auth['uid'].to_s).first || User.create_with_omniauth(auth) reset_session session[:user_id] = user.id redirect_to root_url, :notice => 'Signed in!' end def destroy reset_session redirect_to root_url, :notice => 'Signed out!' end def failure redirect_to root_url, :alert => "Authentication error: #{params[:message].humanize}" end end
but when i click on sign in i face this error {"code": 400, "error_type": "OAuthException", "error_message": "You must include a valid client_id, response_type, and redirect_uri parameters"}
and this is url : https://www.instagram.com/oauth/authorize?client_id&redirect_uri=http://localhost:3000/auth/instagram/callback&response_type=code&scope=basic&state=955173070b58f0de9affcdb30c0da27d836683b922542db1 what is my problem ? |
| fonts and images and not loading Posted: 28 Jun 2016 07:43 AM PDT I have deploy my application on AWS with nginx and passenger .My images, fonts and icons are not loading .I have look for the possible solution on internet like config.assets.compile = true and did RAILS_ENV = 'production' rake assets:precompile but nothing working for me |
| Difference between ActiveRecord::Base.connection and find_by_sql Posted: 28 Jun 2016 07:31 AM PDT I need to perform some custom queries on my rails application and was wondering wich approach is better: results = ActiveRecord::Base.connection.execute(query)
Or Model.find_by_sql(query)
Been reading the documentation but didn't really get how they perform. |
| Ajax request to rails controller is setting the id parameter = "destroy"? Posted: 28 Jun 2016 07:31 AM PDT so I have a weird problem where for some reason the id parameter in my delete request is being set to "destroy". Here is the code for my ajax request function deleteItems(id_data, table){ $.ajax({ url: '/items/destroy', method: 'DELETE', processData: true, data: {ids: id_data }, success: function(){ dropItems(id_data, table) } }); }
And here are the parameters I am getting in the rails controller {"ids"=>["6", "19"], "controller"=>"items", "action"=>"destroy", "id"=>"destroy"}
If I try and set the data key to id (instead of id's) I get this {"id"=>"destroy", "controller"=>"items", "action"=>"destroy"}
Any help in figuring out why id is being set to "destroy" would be awesome. Thanks |
| How to use ruby uniq on nested array/hash Posted: 28 Jun 2016 07:37 AM PDT I am trying to call the uniq method on the follow json so that it would only return unique result base on employee_id # Json array a ={ results: [ { employee: { name: "A", employee_id: "A-00016", title: 1 } },{ employee: { name: "A", employee_id: "A-00016", title: 2 } },{ employee: { name: "C", employee_id: "C-00017", title: 3 } } ] } # Calling uniq on a a.uniq { |p| p.values_at(:employee_id) }
However, I am only getting this result { results: [ { employee: { name: "A", employee_id: "A-00016", title: 1 } } ] }
Instead of what I want { results: [ { employee: { name: "A", employee_id: "A-00016", title: 1 },{ employee: { name: "C", employee_id: "C-00017", title: 3 } } ] }
Am I using the correct method to output the result I want? |
| How to read from Rails cache atomically Posted: 28 Jun 2016 07:17 AM PDT I have 2 processes running. The user action that basically does this: Rails.cache.fetch("items/#{self.id}/default_as_json") do super(root: false, :only => get_only_show, :methods => get_include_methods ) end
On page load Then I have another process, that does not run as often. Maybe once every 2 weeks, but it runs for a couple hours.
This process is doing a lot of data processing and after a lot of testing the best option I came up with was just to clear the entire cache after each step. So the website served the most up to date information. The performance cost of this is not much of an issue.
I am essentially running into a race condition on page load. It seems like it is finding the existence of the key, but by the time it goes to read the key the file has been deleted.
This is the stack trace I am seeing when this happens: ActionView::Template::Error (No such file or directory @ rb_sysopen - [CACHE_LOCATION]/A95/DD0/.permissions_check.70057658850120.4451.366289): 43: <% if object_type == "Item" %> 44: <%= render( 45: partial: 'items/no_table_row', 46: locals: {object: this_object.as_json, 47: singlesearch: true} 48: ) %> 49: <% elsif object_type == "Ability" %> app/models/item.rb:202:in `serializable_hash' app/views/poly_single_searches/_search_list.html.erb:46:in `block in _app_views_poly_single_searches__search_list_html_erb__1164541304050581354_70057643074520' app/views/poly_single_searches/_search_list.html.erb:35:in `_app_views_poly_single_searches__search_list_html_erb__1164541304050581354_70057643074520' app/views/poly_single_searches/fetch_search.html.erb:1:in `_app_views_poly_single_searches_fetch_search_html_erb___2217227932112086773_70057643107440' app/controllers/poly_single_searches_controller.rb:14:in `fetch_search' Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/_trace.text.erb (0.8ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.text.erb (1.0ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/template_error.text.erb (7.5ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/_markup.html.erb (0.6ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/_inner_console_markup.html.erb within layouts/inlined_string (0.5ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/_prompt_box_markup.html.erb within layouts/inlined_string (0.7ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/style.css.erb within layouts/inlined_string (0.5ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/console.js.erb within layouts/javascript (11.0ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/main.js.erb within layouts/javascript (0.3ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/error_page.js.erb within layouts/javascript (0.4ms) Rendered /home/jon/.rvm/gems/ruby-2.1.2/gems/web-console-2.2.1/lib/web_console/templates/index.html.erb (26.0ms)
When this other process is not running, everything works perfectly. I have it as a task to figure out a better way to clear caching, right now not clearing the cache after each step is not an option.
One solution I have is wrapping the Rails.cache.fetch in a rescue for this however that may just keep failing until it manages to run fast enough. |
| Errno::EMFILE (Too many open files - socket(2)) when using RedisStore for caching while running in Passenger Posted: 28 Jun 2016 07:11 AM PDT My application is using the redis store, which works fine locally, but in production, using Phusion Passenger (open source) I run into this error. Errno::EMFILE (Too many open files - socket(2)): vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:24:in `initialize' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:24:in `initialize' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:143:in `new' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:143:in `connect_addrinfo' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:187:in `block in connect' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:185:in `each' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:185:in `each_with_index' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:185:in `connect' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/connection/ruby.rb:260:in `connect' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:336:in `establish_connection' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:101:in `block in connect' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:293:in `with_reconnect' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:100:in `connect' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:364:in `ensure_connected' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:221:in `block in process' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:306:in `logging' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:220:in `process' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis/client.rb:120:in `call' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis.rb:862:in `block in get' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis.rb:58:in `block in synchronize' /usr/local/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis.rb:58:in `synchronize' vendor/bundle/ruby/2.2.0/gems/redis-3.3.0/lib/redis.rb:861:in `get' vendor/bundle/ruby/2.2.0/gems/redis-store-1.1.7/lib/redis/store/interface.rb:5:in `get' vendor/bundle/ruby/2.2.0/gems/redis-store-1.1.7/lib/redis/store/marshalling.rb:17:in `get' vendor/bundle/ruby/2.2.0/gems/redis-activesupport-4.1.5/lib/active_support/cache/redis_store.rb:230:in `block in read_entry' vendor/bundle/ruby/2.2.0/gems/redis-activesupport-4.1.5/lib/active_support/cache/redis_store.rb:212:in `call' vendor/bundle/ruby/2.2.0/gems/redis-activesupport-4.1.5/lib/active_support/cache/redis_store.rb:212:in `with' vendor/bundle/ruby/2.2.0/gems/redis-activesupport-4.1.5/lib/active_support/cache/redis_store.rb:230:in `read_entry' vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.6/lib/active_support/cache.rb:413:in `block in exist?' vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.6/lib/active_support/cache.rb:547:in `block in instrument' vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.6/lib/active_support/notifications.rb:166:in `instrument' vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.6/lib/active_support/cache.rb:547:in `instrument' vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.6/lib/active_support/cache.rb:412:in `exist?' vendor/bundle/ruby/2.2.0/gems/redis-activesupport-4.1.5/lib/active_support/cache/redis_store.rb:200:in `exist?'
My cache initialization code is Rails.application.configure do Rack::MiniProfiler.config.storage_options = { host: 'redis.local.com', port: 6379 } Rack::MiniProfiler.config.storage = Rack::MiniProfiler::RedisStore config.cache_store = :redis_store, http://redis.local.com:6379, { expires_in: 5.minutes } Rails.cache = ActiveSupport::Cache::RedisStore.new end
Having searched all over the redis-rb and redis-store gems, hasn't turned up anything at all. How do I ensure passenger does not create multiple connections to Redis when using it as cache store? |
| Multisearch pg_search with Rails Posted: 28 Jun 2016 07:29 AM PDT I have a question about multi field search using pg_search gem. What I want to do is make a query in multiples fields, so I have the following code in my Client model: pg_search_scope :search, :against => [:name, :email], :using => [:trigram, :tsearch], :ignoring => :accents
For testing I have: Client 1 name: "Anna" email: "mycompany@foo.com" Then I searched with Client.search("anna") and no results are returned. Or Client.search("nna") also no results found. Any suggestion here ? Thanks in advance. Update 1 I set the threshold manually and it works: pg_search_scope :search, :against => [:name, :email], using: { tsearch: {}, trigram: {threshold: 0.1} }
|
| Authenticating on two different backend servers Posted: 28 Jun 2016 07:15 AM PDT Due to requirement changes we need to add a node server to our already existing system. We will be using sails.js for the realtime communication part of the app and redis store for session management. But the confusion now is what is the best way to authenticate the client app/user on both servers with one login form. Any help will be much appreciated. |
| Ruby on Rails: is there an ideal app directory structure in Windows Posted: 28 Jun 2016 06:59 AM PDT Just a quick question from a Rails learner. As I understand it, it is not necessary to place a new Rails app inside the directory where Ruby and Rails are installed. But, is there an ideal place for apps? What are experienced developers using? I ask this, because I may have misplaced a previous app, hidden somewhere deep in a directory structure; and, strange as it might seem to most of you, I cannot find where the older app is. I have quite some problems searching in Windows 10; it is a nightmare, compared to how it was in Windows XP. |
| Setting default value for Rails select helper block Posted: 28 Jun 2016 07:27 AM PDT How can I set default value in Rails select helper block? <div class="field"> <label>Gender</label> <%= f.select :gender, [], { prompt: 'Select gender', selected: 'Female' }, { :class => 'ui selection dropdown' } do %> <% Subject.genders.keys.each do |c| %> <%= content_tag(:option, value: c, class: 'item') do %> <%= content_tag(:i, '', class: "#{c.downcase} icon") %> <%= content_tag(:span, c) %> <% end %> <% end %> <% end %> </div>
I tried setting it with :selected option but it doesn't work. |
| Convert String to DateTime Ruby Posted: 28 Jun 2016 07:27 AM PDT I have a string "2015-11-01T10:00:00.00+08:00" extracted from json response. How can convert it to Time or DateTime? I tried Time.new("2015-11-01T10:00:00.00+08:00") its returning 2015-01-01 00:00:00 +0530, clearly the date is changed here and time too. |
| Rails/AJAX cached form submission - 422 unprocessable entity Posted: 28 Jun 2016 06:14 AM PDT My Rails app features a public-facing form that passes user input to the controller as a stringified JSON via AJAX. The form is designed for offline use, and so every visit to the form page other than the first is served from the browser cache (using the cache manifest). I am having an issue where the form submission returns a 422 unprocessable entity error unless the browser history has been cleared before navigating to the form page... that is to say that a user can only make one form submission, all subsequent submissions are 422 unless they clear the history and return to the form to refresh the cache. Unfortunately, that's not going to fly. I am not tremendously experienced with Rails security, but I am under the impression that this has to do with CSRF protection and the fact that, for any visit to the form page other than the first, a stale CSRF token is being passed. My AJAX request appears like so: $.ajax({ url: "post/submission", type: "POST", dataType: "json", beforeSend: function(xhr) {xhr.setRequestHeader("X-CSRF-Token", $("meta[name='csrf-token']").attr("content"))}, data: {"post" : postParameter}, success: function(response){ window.location = '/post/approval'; } });
At the moment, the layout page includes the <%= csrf_meta_tags %>, and I have the standard protect_from_forgery with: :exception in the application controller. The final structural element to note about this form is that, although the form itself is public-facing, it requires a user login after the submit button is clicked - so a submission will not be successful without a valid login. Is there a safe way that I can get around this problem? I'm sure it goes without saying, but I can't have my users clearing their history and re-caching the form after every submission. |
| Rails, rollback on trying to create an instance of a model with multiple belongs_to Posted: 28 Jun 2016 06:13 AM PDT I have a class "Localization". "Articles" have many localizations. This worked perfectly until I created a model Event and tried to add localizations to that too. My localization class class Localization < ApplicationRecord belongs_to :event belongs_to :article belongs_to :language end
My article class class Article < ApplicationRecord has_many :localizations, dependent: :destroy mount_uploader :image, ImageUploader enum article_type: [:news, :catalog, :notifs] end
My event class class Event < ApplicationRecord has_many :localizations, dependent: :destroy mount_uploader :image, ImageUploader end
My localizations table creation create_table :localizations do |t| t.integer :article_id t.integer :event_id t.integer :language_id t.string :title t.text :text t.timestamps end
When I try to create an item of either Article or Event I get a rollback: SQL (1.3ms) INSERT INTO "articles" ("created_at", "updated_at", "article_type") VALUES ($1, $2, $3) RETURNING "id" [["created_at", 2016-06-28 13:08:36 UTC], ["updated_at", 2016-06-28 13:08:36 UTC], ["article_type", 0]] (11.5ms) COMMIT Localization Load (0.8ms) SELECT "localizations".* FROM "localizations" WHERE "localizations"."article_id" = $1 AND "localizations"."language_id" = $2 LIMIT $3 [["article_id", 4], ["language_id", 1], ["LIMIT", 1]] (0.2ms) BEGIN Language Load (0.3ms) SELECT "languages".* FROM "languages" WHERE "languages"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]] (0.3ms) ROLLBACK
What am I doing wrong? |
| How to import a postgis db on heroku with rails Posted: 28 Jun 2016 06:11 AM PDT How to correctly import a postgres 9.4 + postgis 2.1 database on Heroku with rails ? They have beta support for postgis, however I tried using pg:push as they documented, but it throws a warning about needing to be a sudo user to create postgres operators. Moreover I can't be sure the complex data I have (multipolygons) is correctly copied during the process. Is there a specific process to follow for postgis ? Thanks. |
| How to keep same order on each session? Posted: 28 Jun 2016 06:15 AM PDT I'm working on a store in rails. As I'm new to Rails I was following some tutorial on how to create a shopping cart and ordering system. So right now orders with unique ids are being created and saved by a user, automatically, upon addition of a order_item to a cart on each new session. And this is the issue. I want order to persist until 30 days passes (the one order that is created first, that is, when first order_item has been added by a user). The problem is next: So if user adds order_items, he creates an order and then logs out and comes back and adds a new order_item to his cart, new order is being created even though there is already his older order saved to database. I want to retrieve that first order. Can you please tell me how to achieve this? class OrderItemsController < ApplicationController def create @order = current_order @order_item = @order.order_items.new(order_item_params) @order.user_id = current_user.id @order.save session[:order_id] = @order.id respond_to do |format| format.js { flash[:notice] = "ORDER ITEM HAS BEEN ADDED." } end end
order_item.rb class OrderItem < ActiveRecord::Base belongs_to :product belongs_to :order validates_associated :order validates :quantity, presence: true, numericality: { only_integer: true, greater_than: 0 } validate :product_present validate :order_present before_save :finalize def unit_price if persisted? self[:unit_price] else product.price end end def total_price unit_price * quantity end private def product_present if product.nil? errors.add(:product, "is not valid or is not active.") end end def order_present if order.nil? errors.add(:order, "is not a valid order.") end end def finalize self[:unit_price] = unit_price self[:total_price] = quantity * self[:unit_price] end end
order.rb class Order < ActiveRecord::Base belongs_to :order_status belongs_to :user has_many :order_items validates_length_of :order_items, maximum: 3 before_create :set_order_status before_save :update_subtotal def subtotal order_items.collect { |oi| oi.valid? ? (oi.quantity * oi.unit_price) : 0 }.sum end private def set_order_status self.order_status_id = 1 end def update_subtotal self[:subtotal] = subtotal end end
user.rb has_many :order
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| Initialize Ruby codes error Posted: 28 Jun 2016 06:33 AM PDT I tried to run these codes: class Dog def set_name(name) @dogname = name end def get_name return @dogname end def talk return "awww" end def initialize(title, description) @title = title @description = description end end doggy = Dog.new doggy.set_name('Sam') puts doggy.get_name puts doggy.talk bogart = Dog.new('The Book', 'The road not taken') puts bogart.to_s puts bogart.inspect
I did make sure every argument is correct. However, I got the following errors. C:\Ruby200\bin\ruby.exe -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) C:/Users/Todd/RubymineProjects/untitled1/test.rb C:/Users/Todd/RubymineProjects/untitled1/test.rb:15:in `initialize': wrong number of arguments (0 for 2) (ArgumentError) from C:/Users/Todd/RubymineProjects/untitled1/test.rb:22:in `new' from C:/Users/Todd/RubymineProjects/untitled1/test.rb:22:in `<top (required)>' from -e:1:in `load' from -e:1:in `<main>' Process finished with exit code 1
Tried my best can't find the issue. Any idea where I miss? |
| Webmock stub request not working Posted: 28 Jun 2016 06:16 AM PDT I need to make a request to facebook throw an error, so that I can ensure my circuit breaker is working. My test is this context 'when Facebook API is not responding' do before(:each) do stub_request(:get, 'facebook.com/*') .with(headers: { 'Accept' => '*/*', 'Content-Type' => 'application/json', 'User-Agent' => 'Faraday v0.9.2' }) .to_raise(StandardError) end it 'should return error code 40' do 3.times { post :create, valid_params } expect(Oj.load(response.body)['code']).to be_eql '40' end it 'message should say that Facebook is not answering' do 3.times { post :create, valid_params } expect(Oj.load(response.body)['error']) =~ 'not answering' end end
If I configure VCR like this: c.allow_http_connections_when_no_cassette = true
the tests does not pass, and I see even with the stub_request, the app calls Facebook endpoints. If I change allow_http_connections_when_no_cassette to false, it throws an error and trips my circuit breaker Switching facebook_user_data from green to red because VCR::Errors::UnhandledHTTPRequestError
Although with the circuit tripped the tests pass, it is not the correct exception thrown. |
| Testing Angular CoffeeScript with vanilla JS? Posted: 28 Jun 2016 05:03 AM PDT I'm about to inherit a somewhat mature Rails monolith for work. The previous maintainers chose to write Angular JS controllers and whatnot in CoffeeScript, served through the Rails asset pipeline. I prefer regular old JS because I hate having to 'translate' documentation just to hope that it compiles to the right JS. I also lack tests. No mocha, no jasmine, no capybara, nada. Before I jump in and start converting the Coffee to JS file by file, I would like some tests so I know that my preference for JavaScript doesn't completely wreck everything. Does anyone have experience writing tests for Coffee-Angular in vanilla JS? |
| Show Results Based on experiment_type Posted: 28 Jun 2016 07:24 AM PDT I have a table experiments in my database that is populated by filling out a form. One of the fields in the form is experiment_type, which is a drop down option to select between either AOV or Conversion. In my show.html.erb I'd like to display the AOV experiments and the Conversion experiments seperately. I'm kinda stuck on where to begin with this. I thought I could do something in my show action like @aov_experiment = Experiment.where(:experiment_type => "AOV").order("created_at DESC") @conversion_experiment = Experiment.where(:experiment_type => "Conversion").order("created_at DESC")
Then loop through and show the results in my show.html.erb I think I am way off here. Hoping someone can point me in the right direction. |
| Can I find the key an embedded document is embedded under in MongoMapper? Posted: 28 Jun 2016 04:53 AM PDT Say I have a document like this: { one: {name: "John"}, two: {name: "Paul"}, three: {name: "George"}, four: {name: "Ringo"} }
I've ended up with the three subdocument as a MongoMapper object. I know I can find the parent document, I can read the name attrib on the object I have, but is there an easy way to find the fact that it's embedded as three in the parent document? I have two potential solutions, but both strike me as flaky. One is to get the class name of the object (which I'd then have to mess with since these classes are all subclasses of another class) and another would be some sort of match on all the embedded documents in the parent (which seems very non-optimal). |
| getting latitude and longitude values from controller in rails-geocoder gem Posted: 28 Jun 2016 05:03 AM PDT Is it possible to get latitude and longitude values in the controller when using geocoder gem in rails? What am currently doing for getting all nearby location is pass the location name like below. event_address = Event.near(location, 15, order: 'distance')
So is there a way to fetch the lat and lng which was used for the above requested location for using later in subsequent requests for same location? @latitude= #some method @longitude= #some_method |
| Migration for changing belongs_to association Posted: 28 Jun 2016 05:14 AM PDT I have a model called categories currently they belong to product but I'd like them to belong to store instead. I have several thousand of these so what I'd like to do is create a migration that adds a store_id to categories and then, gets the associated product.store.id from it's current association and adds that to the store_id. After that I'd like to remove the product association. Does anybody know how to easily and safely achieve that? |
| delete dash character which is at the end of the string Posted: 28 Jun 2016 05:13 AM PDT So I have table items in my db. I want in Item.name replace - character which is at the end of the Item.name So I try to do it like this: items = Item.all items.each do |it| it.name=it.name.gsub('/\-$/','') it.save end
But it doesn't work. What do I do? upd: I managed to do it like this: i = Item.all i.each do |it| it.name=it.name.chomp('-') it.save end
But still don't get why first variant didn't work |
| Correct s3 region not setting with paperclip Posted: 28 Jun 2016 04:55 AM PDT Using these two gems, I had no issues: gem 'aws-sdk', '< 2.0' gem "paperclip", "~> 4.3"
When now using: gem "paperclip", "~> 5.0.0.beta1" gem 'aws-sdk', '>= 2.0.34'
I have region issues in development.rb: config.paperclip_defaults = { :s3_region => ENV['S3_REGION'], # us-west-2 :storage => :s3, :s3_credentials => { :bucket => ENV['S3_BUCKET_NAME'], :access_key_id => ENV['AMAZON_ACCESS_KEY_ID'], :secret_access_key => ENV['AMAZON_SECRET_ACCESS_KEY'] } }
I see no documentation on this. The url I'm after is https://s3-us-west-2.amazonaws.com<bucken-name>.... but I'm getting: https://s3.amazonaws.com/... |
| Parse Postgres date stored as string including offset timezone Posted: 28 Jun 2016 07:07 AM PDT I have some dates stored as strings in a postgresdb "Fri, 24 Jun 2016 04:13:26 -0700"
I want to treat those dates as dates. I can use to_timestamp(date,'Dy, DD Mon YYYY HH24:MI:SS')
But I can't work out how to deal with the timezone. there appears to be OF as the parameter for the offset. If I use to_timestamp(date, 'Dy, DD Mon YYYY HH24:MI:SS OF')
The query hangs. I can't work out what I'm doing wrong there. Note: I'm using activerecord and rails. so the query is actually Model.all.order("to_timestamp(date,'Dy, DD Mon YYYY HH24:MI:SS OF') DESC")
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