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• Multiple row insertion in a faster way

  - by Cyborgo

  Hi, I am using rails and I am trying to insert new rows into the table. The data comes from a text file and I created hash with one of the attribute as key. Then I find all the keys that are currently not in the table. Then I need to insert all of them into the table with all the attributes that I saved in hash. newvals.each{ |x| author = Author.create(:first => x, :second => hash[x][0], :third => hash[x][1]) author.save } This has lot of overhead as it makes an SQL update one at time. The newals array is usually quite big around the size of 20-30k. I know create can insert multiple objects at once, but I cant seem to figure out how. Is there any way to get this done. Thanks.

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• Check if a layout exists in Rails?

  - by viatropos

  Is there a standard way to check if a view layout exists from within a Controller in Rails? I'm trying to allow the user to determine the layout, but it needs to exist first.

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• Rails query to find other likes based on category

  - by Mik

  I need to do something like the following: Find other categories people like based on the categories you like. I have a likes table, which is joined to users and categories. I need to do an efficient query to find out what other categories people who liked a given category also like. Any thoughts on this would be appreciated. Thanks in advance.

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• map.resources, :as => root?

  - by Newy

  I'd like to map my Users to root - so '/:id'. I do the following now map.connect ':id', :controller = 'users', :action = 'show' ... but I'd also like the links that are generated by Rails to have this format. Can I do a map.resources ... :as = :root or something similar?

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• rails active record - Advanced find

  - by par

  I have the following model setup - a User is interested in projects in many project Categories. Each Project has many categories. Like so: class User has_many :projects has_and_belongs_to_many :project_categories class Project belongs_to :user has_and_belongs_to_many :project_categories class ProjectCategory has_and_belongs_to_many :projects has_and_belongs_to_many :users Now, I'd like to do a find for projects with any of the catogories that a certain user are interested in, i.e. if a user is interested in project categories A,B,C then I'd like to find projects which are part of one or more of those project categories. Anyone?

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• rails log rotation behaves weird (rails version 2.3.5)

  - by robodo

  I'm trying to setup log rotation in rails. I have put this in my environment/development.rb: config.logger = Logger.new("#{RAILS_ROOT}/log/#{ENV['RAILS_ENV']}.log", 1, 5*1048576) 2 files are created :-) but it looks like rails is writing to them randomly and at the same time as well. This creates messy log files :-( what am I missing?

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• rspec nested ( has many resource ) no route found error

  - by Surya

  My calendar resource is a nested resource under profile map.resources :profiles, :has_many=>[:calendar] I am trying to write a rspec spec for calendarcontroller it "should use supplied date" do get :show , :month = '09' , :year = '2010' end But i get an error stating No route matches {:month="09", :year="2010", :controller="calendar", :action="show"} Any idea how i could get around this ?

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• Rails Functional test assert_select javascript respond_to

  - by Macint

  Hello, I am currently trying to write functional tests for a charging form which gets loaded on to the page via AJAX(jQuery). It loads the form from the charge_form action which returns the consult_form.js.erb view. This all works, but I am having trouble with my testing. In the functional I can go to the action but I cannot use assert_select to find a an element and verify that the form is in fact there. Error: 1) Failure: test_should_create_new_consult(ConsultsControllerTest) [/test/functional/consults_controller_test.rb:8]: Expected at least 1 element matching "h4", found 0. <false> is not true. This is the view. consult_form.js.erb: <div id="charging_form"> <h4>Charging form</h4> <div class="left" id="charge_selection"> <%= select_tag("select_category", options_from_collection_for_select(@categories, :id, :name)) %><br/> ... consults_controller_test.rb: require 'test_helper' class ConsultsControllerTest < ActionController::TestCase def test_should_create_new_consult get_with_user :charge_form, :animal_id => animals(:one), :id => consults(:one), :format => 'js' assert_response :success assert_select 'h4', "Charging form" #can't find h4 end end Is there a problem with using assert_select with types other than html? Thank you for any help!

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• Contents of a node in Nokogiri

  - by Styggentorsken

  Is there a way to select all the contents of a node in Nokogiri? <root> <element>this is <hi>the content</hi> of my æøå element</element> </root> The result of getting the content of /root/element should be this is <hi>the content</hi> of my æøå element Edit: It seems like the solution is simply to use myElement.inner_html(). The problem I had was in fact that I was relying on an old version of libxml2, which escaped all the special characters.

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• rails, accepts_nested and has_many :through is creating duplicate entries

  - by Sam

  Hi, I have a store model that has many products with a has_many :through relationship. I have this working with accepts_nested_attributes, but the result is that rails is making duplicate associates. I don't have anything special going on it is a very simple app. Any ideas on why duplicates associates are getting created?

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• How can you identify all events before and after a today in IRB?

  - by Trip

  I for the life of me can't figure out the correct syntax to show the count of events before and after today. Here's my awful and disgusting attempt: Events.find(:all).select {|e| e.date Time.now}.size The trouble is the or < operators don't work with Time.. :D

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• Is it possible to enforce a controller method to work only for specific HTTP methods?

  - by Shay Friedman

  I was wondering if there was a way to make controller methods in rails available only for specific HTTP methods (GET, POST, etc.). I guess I can create a filter to do that but it seems to me that it is something that is available out-of-the-box in rails. Is it?

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• Is it possible to have variable find conditions for both the key and value?

  - by DarrenD

  I'm trying to pass in both the field and the value in a find call: @employee = Employee.find(:all, :conditions => [ '? = ?', params[:key], params[:value].to_i) The output is SELECT * FROM `employees` WHERE ('is_manager' = 1) Which returns no results, however when I try this directly in mysqsl using the same call without the '' around is_manager, it works fine. How do I convert my params[:key] value to a symbol so that the resulting SQL call looks like: SELECT * FROM `employees` WHERE (is_manager = 1) Thanks, D

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• How to override 'where' in rails 3

  - by Zakwan Alhajjar

  I have upgraded my application from rails 2.3.8 to 3.0.3 . But I'm facing a problem. I was using 'find' but the overriding doesn't work in rails 3: # override activerecord's find to allow us to find by name or id transparently def self.find(*args) if args.is_a?(Array) and args.first.is_a?(String) and (args.first.index(/[a-zA-Z\-_]+/) or args.first.to_i.eql?(0) ) find_by_login_slug(args) else super end end I'm wondering if there is a way to make this work in rails 3 or even by using where instead. thanks

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• validates_associated not honoring :if

  - by James Ferguson

  I'm totally blocked on this. See this pastie for sample code: http://pastie.org/990040 The first test will fail. The user model validates an associated address model, but is only supposed to do it if a flag is true. In practice it does it all the time. What is going on?

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• Rails - single ID for multiple models

  - by user352351

  I'm building an app which will allow a user to scan the barcode on a 'shelf', 'box' or 'product' which will then bring up that particular item or all the associated items. As these are all separate models with their own ID's, I need a global ID table. I was thinking of a polymorphic table called 'barcodes' barcodes id barcode_number barcodable Is there an easy way to do this? Or is polymorphic the best way?

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• session[:key] = value doesn't work

  - by Bill Leeper

  I am trying to make use of session data in my application and for some reason I don't have something setup right. The code: session[:key] = some_value Generates the following error: The error occurred while evaluating nil.[] Other controllers don't have an issue with the session, so I am guessing I missed some basic configuration thing somewhere.

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• What is Active Record - design pattern or module?

  - by piemesons

  Basically what's the difference between design pattern, module and some other terms we use.

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• Rails: validation that spans multiple models, where to put it?

  - by randombits

  I have a custom validation method that is exactly the same for two or more models. Where's the best place to put this validation method so that both models can access it and keep things DRY? If the validation fails, I also want to use errors.add_to_base, so wherever this method is put, I should be able to accommodate for that.

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• Problem building relationships between models

  - by Brian Roisentul

  Until now, I've been using acts_as_taggable_on plugin for tagging announcements. That plugin creates the following tables: taggings: relates tags and announcements table(for the tagged item, it has a field called taggable_id, which I rename to "announcement_id" for what I'll explain below). tags: has the tag ids and names. The other day, I discovered that I had no way of getting the announcements tagged with a certain tag, but doing Announcement.tagged_with(tag_name), and I don't want to search by name, but for id. So, as I'm using almost nothing of the functionality in that plugin, I decided to create the models for taggings and tags tables, to accomplish this: Announcement.tags. The models' relationships look as following: class Tagging < ActiveRecord::Base belongs_to :announcement belongs_to :tag end class Tag < ActiveRecord::Base has_many :announcements, :through => :taggings end class Announcement < ActiveRecord::Base has_many :tags, :through => :taggings Why can't I execute the command Announcement.tags? Because when I try, I get undefined method `tags'

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• Controller path for nested resource - undefined method `<controller>_path'

  - by owilde1900

  I'm having trouble displaying my form at /users/2/friends/new. I'm receiving undefined method `friends_path' for #<#<Class:0x21f0c14>:0x21ef364> Here is the beginning of the form <% form_for(@friend) do |f| %> And the friends controller def new @user = User.find(params[:user_id]) @friend = @user.friends.build end This is the route resources :users do resources :friends end And the relevant path from "rake routes" users/:user_id/friends/new(.:format) {:controller=>"friends", :action=>"new"} Any help or insight is greatly appreciated. This is my first rails 3 app.

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• Multiple controllers with a single model

  - by Eric K

  I'm setting up a directory application for which I need to have two separate interfaces for the same Users table. Basically, administrators use the Users controller and views to list, edit, and add users, while non-admins need a separate interface which lists users in a completely different manner. To do this, would I be able to just set up another controller with different views but which accesses the Users model? Sorry if this is a simple question, but I've had a hard time finding how to do this.

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• No route matches - after login attempt - even though the route exists?

  - by datorum

  I am working on a rails application and added a simple login system according to a book. I created the controller admin: rails generate controller admin login logout index It added the following routes to routes.db get "admin/login" get "admin/logout" get "admin/index" I can got to http://localhost:3000/admin/login there is no problem at all. But when I try to login I get: No route matches "/admin/login"! Now, the first confusing part is that the "login" method of my AdminController is not executed at all. The second confusing part is that this code works like a charm - redirects everything to /admin/login: def authorize unless User.find_by_id(session[:user_id]) flash[:notice] = "you need to login" redirect_to :controller => 'admin', :action => 'login' end end Sidenotes: I restarted the server several times. I tried a different browser - to be sure there is no caching problem.

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• Rails 3 does not render HTML as markup

  - by suebphatt

  Hello, Stackoverflow. I submitted a form, to create single row in SQL database table, as a blog entry: <p>This is a paragraph.</p> And the result, when I query it out for display, via Rails's ActiveRecord, it rendered like this, : <p>This is a paragraph.</p> and here's the code, when I view source in browser: &lt;p&gt;This is a paragraph.&lt;/p&gt; How do I solve this? Or I just have to convert the < and > by Javascript? Thank you :)

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• Order records from multiple models by attribute

  - by Labuschin

  Given the three models “message”, “profile” and “comment” i want to merge them into one list, ordered by their common attribute “created_at”. I want to accomplish something like the project overview in Basecamp - see 3) here: http://basecamphq.com/tour#overview

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