similar to: where condition having no association

Rails 3.1.3 I have a model ''Airline'', whose STRING column is ''company'' only. Also, another model ''Plan'' has an INTEGER column ''airline_id''. I would like to show the ''company'' name (string) in a template like <% @plans.each do |plan| %> Airline: <%=

Rails 3.1.3 rspec-rails (2.11.4) rspec 2.11.1 I am new to rspec. I don''t quite understand tests for POST create part. I have generated scaffold, and simultaneously it generated controller_spec.rb as well. it "assigns a newly created plan as @plan" do post :create, {:plan => valid_attributes}, valid_session assigns(:plan).should be_a(Plan)

rails 3.2.11 My app has User model, its one of the fields is entrepreneur:boolean. So users have two types; one is normal users, the other is professional users. For normal users, only emails and usernames are required and other fields are optional. For professional users, in addition to above, addresses and real names are required. Is there any Ruby way to set the requirement depending on the

Rails 3.1.3 Hi. I''m a little confused with Devise and ActionMailer. It seems that Devise has its own way of sending mails through ActionMailer. Does it generate Mailer class when "rails g devise..." command is executed? Or do I need to do some special command in order to generate Mailer? I have certainly set up a devise User table but there is no Mailer class for it,

Rails 3.2.11 Sidekiq latest My app continues background jobs that generate texts as the output. class ProcessText include Sidekiq::Worker def perform(name, count) puts "executing..." @feed = Feed.first @feed.process # here it returns String results! end end What I want is basically how to send (or push?) the result texts to a particular web

I trying to create a select using Arel but I''m passing three parameters, I want to include the parameters only if they are different to nil or blank. Here is my method: def self.advsearch(summary_description, specialties, place) User.joins(:experience,:summary,:information) .where(Information.arel_table[:business].eq(false))

Rails 3.1.3 After watching http://railscasts.com/episodes/258-token-fields?autoplay=true I have installed the similar functionality to my app. However, def index @cities = City.all ... does in fact give the list of all cities in the text field, but def index @cities = City.where("name like ?", "%#{params[:q]}%") ... does NOT

Rails 3.1.3 I have tables, Video and Script having association, Video 1 --- n Script So, every Script needs the parent id, in this case, video_id. If I simply create a new Script instance, the view renders as follows. <%= render :partial => "new_script", :locals => { :script => Script.new(:video_id => @video.id)} %> which works fine. Now I would like to

Rails 3.1.3 Hi. I have designed the database used for my travel plan application. You should be able to look at the diagram in the link below, hopefully. https://cacoo.com/diagrams/biDSyxh8yzk2kIeg ("belongs_to" is omitted since it''s obvious) Basically, the application can list the destinations from a choice of the departure. Not mention that the departure_id (integer) and

Hi all I want to make copy of current scoped object, then change some stuff in arel_table(i need to change table_alias, because i have complicated query) and arel(SelectManager) def self.do_smth query = scoped.dup puts query.arel_table.object_id == scoped.arel_table.object_id # true end Theoretically i can dup arel(SelectManager) but i can not find how to add table alias to that instance

Rails3.1.3 I have db type, startp:integer I need to change it to float. More specifically, 1.2, 45.1, 143.8 ... I have two questions: 1. Is removing and adding the field through migration the only way? in other words, is there a single command to change the type? 2. Is there anyway to limit the decimal place to only one? 56.3, 34.2... are acceptable, but 23.112, 77.34, ... are

Rails 3.1.3 I believe this is a very very fundamental question, but since I am new to Rails, it''s more productive to ask someone to point out what I need to do. Say, I have a search method that generates a list of youtube videos. I have completed this part. And also, I have set up a database, Video, whose fields are video_title and URL. I need to place a button to each of these video

ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux] rails 3.1.3 Ubuntu 10.04 LTS I have another environment with MacOSX Snow Leopard, and am sharing the Rails project files through Dropbox. When I chose to develop a project further in this Ubuntu machine, I have executed ''bundle install'' which gave an error #--------- Gem::Installer::ExtensionBuildError: ERROR: Failed to

say I have a matrix and lists like x <- matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) x.list <- lapply(seq_len(nrow(x)), function(i) x[i,]) if I want a column of the matrix x, I write x[, 2] for example. But how can I do something similar for a set of lists, x.list, above? > x.list [[1]] [1] 12.1 0.1 12.0 1.1 [[2]] [1] 3.44 3.00 33.10 23.00 unlist(x.list)[,2] does

Rails 3.1.3 I have changed a regular scaffold action a bit so that it can save using ajax. All I needed to do was adding ":remote => true" in <div id="script_new"> <%= form_for script, :remote => true do |f| %> <!-- HERE!!! --> <%= f.hidden_field :video_id %> <%= f.text_field :text %> <%= f.submit "save" %>

Has anyone plotted or is it possible to plot CIE *xy* chromaticity diagram http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg I need this plot in color. ishida [[alternative HTML version deleted]]

I''m trying to figure out how to use ActiveRecord in conjunction with ARel. In particular, I''d like to replace my residual literal SQL with ARel, if only I could see how. Let''s take Article with multiple Versions as an example. With ARel alone, I can find articles with their latest versions like this articles = Article.arel_table versions = Article.arel_table

What is the recommended way to use table aliases with ActiveRecord::Relation these days? In prior versions of Rails, this would work: assume (pseudo code): model A has_many b''s model B ,,, at = B.arel_table atalias = at.alias(at.name + "_1") A.join(:b).join(atalias).where(atalias[:a_id].eq(at[:a_id]).where("b.widget =

I need to develop a simple list manipulation. Although it seems easier to do it in matrix form, but I need it in list form. I have a matrix x <- matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) for list form example, the conversion is x.list <- lapply(seq_len(nrow(x)), function(i) x[i,]) ### list version calcnorm=function(a, b){ diff <- mapply("-", a, b)

Hello all, I''ve recently been on a project where somewhere needs using case insensitive search(using UPPER(name) LIKE '''') and LIKE condition, I want to use arel and don''t use the old style string concatenation, can arel handle this? But I check on arel documentation, doesn''t seems have any upper/like operator, and check on arel source, under