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• Rails: find_by, conserving leading whitespaces

  - by peppermonkey

  Hi, when I do the following def somefunction @texts = A.find_all_by_someid(someid) respond_to do |format| format.xml { render :xml => @texts } end end it gets the string from the db correctly, except if the string has leading whitespaces, it seems they are trimmed. Note: the whitespaces are there in the db correctly What can I do to conserve those whitespaces? Thanks

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• advise the decision to build a survey

  - by manzhikov

  advise the decision to build a survey for users on RoR or PHP

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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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• Rails valiation among a three model relationship

  - by Andrew

  I'm working on a three model relationship with one aspect that I'm not sure how to approach. Here's the basic relationship: class Taxonomy has_many :terms # attribute: `inclusive`, default => false end class Term belongs_to :taxonomy has_and_belongs_to_many :photos end class Photo has_and_belongs_to_many :terms end This is pretty straightforward stuff except for one thing: A Taxonomy can be either 'Inclusive' or 'Exclusive'. Exclusive means the terms are mutually exclusive, Inclusive means they're not. So, if a Taxonomy is exclusive ie. taxonomy.inclusive = false, then there can only be one term from that taxonomy attached to a given photo. Now, I can handle this on the client-side without a problem, but I am not quite sure how to set up a validation on Photos (or somewhere else) that says basically: "validate that no more than one term from an exclusive taxonomy is associated with this record." Any ideas on how to do that?

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• Rails layouts per action?

  - by mrbrdo

  I use a different layout for some actions (mostly for the new action in most of the controllers). I am wondering what the best way to specify the layout would be? (Consider like I am using 3 or more different layouts in the same controller) I don't like using render :layout = 'name' that much. I did like doing layout 'name', :only = [:new] but it turns out I can't use that to specify 2 different layouts (e.g. if I call layout 2 times in the same controller, with different layout names and different only options, the first one gets ignored - those actions don't display in the layout i specified). I'm using Rails 2.

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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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• Calling to_xml on an Array of ROXML objects results in an empty collection

  - by findchris

  Hi there. I have a ROXML object that looks like: class Activity include ROXML xml_accessor :id end If I have an array of these objects and call .to_xml on the array, I receive an empty xml collection: "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<activities type=\"array\">\n</activities>\n" Any idea why or how to fix this? I'm running Rails 2.3.5 with the newest version of ROXML. Thanks

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• Test Redirection with RSpec and Capybara (Rails)

  - by balanv

  I just have learnt how cool RSpec and Cabybara is, and now working around it to learn writing actual test. I am trying to check if after clicking a link, there is a redirection to a specific page. Below is the scenario 1) I have a page /projects/list - I have an anchor with html "Back" and it links to /projects/show Below is the test i wrote in rspec describe "Sample" do describe "GET /projects/list" do it "sample test" do visit "/projects/list" click_link "Back" assert_redirected_to "/projects/show" end end end The test fails with a failure message like below Failure/Error: assert_redirected_to "/projects/show" ArgumentError: @request must be an ActionDispatch::Request Please suggest me on how i should test the redirection and what am i doing wrong?

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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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• Can't grab foreign key during after_create callback because it doesn't exist yet!

  - by Randy

  I have some models all linked together in memory (parent:child:child:child) and saved at the same time by saving the top-most parent. This works fine. I'd like to tap into the after_create callback of one of the children to populate a changelog table. One of the attributes I need to copy/push into the changelog table is the child's foreign_key to it's direct parent, but it doesn't exist at the time after_create fires!?! Without the after_create callback, I can look in the log and see that the child is being saved before it's parent (foreign key blank) then the parent is inserted... then the child is updated with the id from the parent. The child's after_create is firing at the right time, but it happens before Rails has had a chance to update the child with the foreign_key. Is there any way to force Rails to save such a linkage of models in a certain order? ie.parent, then child (parent foreign_key exists), then that child's child (again, foreign_key is accessible) etc. ?? If not, how would I have my routine fire after a record is created AND get the foreign_key? Seems a callback like this would be helpful: after_create_with_foreign_keys

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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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• How to trace Bouncing E-mails in Action mailer (Rails)

  - by Hikoo

  Hi, I am using Active mailer to sending Emails, I want to trace the mail ids which are bounced when i am sending the mails to the user. Please give your valuable comments guys. Thanks in Advance. *HIKKU

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• ImageMagick is not processing images, but gives no errors.

  - by Trip

  My problem is is that paperclip saves the attachments appropriately, and I assume imagemagick is doing something right. With no errors returning, the images never finish processing. Does anyone know a way to see what's backgrounding? Or specifically a way to review imagemagick's processes?

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• Pushing to an array not working as expected

  - by Ross Attrill

  When I execute the code below, my array 'tasks' ends up with the same last row from the dbi call repeated for each row in the database. require 'dbi' require 'PP' dbh = DBI.connect('DBI:ODBC:Driver={SQL Server Native Client 10.0};Server=localhost,1433;Database=db;Uid=db;Pwd=mypass', 'db', 'mypass') sth = dbh.prepare('select * from TASK') sth.execute tasks = Array.new while row=sth.fetch do p row tasks.push(row) end pp(tasks) sth.finish So if I have two rows in my TASK table, then instead of getting this in the tasks array: [[1, "Task 1"], [2, "Task 2"]] I get this [[2, "Task 2"], [2, "Task 2"]] What am I doing wrong?

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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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• What is Rails way to DRY up the controller pattern of verifying :id is for a valid object (else redirect to error page)

  - by jpwynn

  One of my controllers has close to 100 methods (eg routes) and nearly every one starts out the same code to redirect to an error page if the id param is invalid, followed by a similar check if the user that id doesn't belong in the user's account: def something @foo = Foo.find_by_guid(params[:id]) unless @foo @msg ||= { :title => 'No such page!', :desc => "There is no such page!" } render :action => "error" and return end unless @foo.owner_id == current_user.id @msg ||= { :title => 'Really?', :desc => "There is no such page." } render :action => "error" and return end What is the best way to DRY up that sort of page id and owner id validation, given the code is doing a render ... and return? What I don't want to do at this point is offload it to a blackbox roles and permissions library like CanCan... my goal is simply to have the in-app code to handle this be as clean as possible.

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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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• 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 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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• 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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• 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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• New to Git. Made a big mistake with git commit and ended up at an older commit

  - by Ramario Depass

  I'm new to Git and I've made a huge mistake. Git kept prompting me with git - rejected master -> master (non-fast-forward). But, I still committed by using: --force This was disastrous, the whole project changed back to the stage it was at about a week ago. I've lost so many changes. I seem to have been pushed back to an earlier commit. Is there anyway I can get back to one of my newer commits? As I have made an enormous amount of changes and need to get them back. Thanks.

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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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• HABTM checking for match of latest 3

  - by user333614

  Here's an interesting one for you folks... I have a HABTM (has_and_belongs_to_many) relationship between "Dogs" and "Trips". My goal is to find two result sets: 1) Dogs that have been on at least 1 of the last 3 trips and call that @dogs_current 2) Dogs that have NOT been on any of the last 3 trips and call that @dogs_old I found that I can find what the last 3 trips are by doing this in the Trip model: named_scope :last3, :order => 'date DESC', :limit => 3 But not sure how to use that list get 1 and 2. This hack works, but it seems ugly. There must be a better way! :) @dogs_current = [] @dogs_old = [] @dogs.each do |dog| if (Trip.last3 - dog.trips).size < 3 then @dogs_current << dog else @dogs_old << dog end end Any ideas? Thanks! -Cam

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• (Rails) How do I reference resources from non-restful views...?

  - by humble_coder

  Hi All, How do you ensure that your javascript includes get included properly for all files everywhere using a particular layout? Basically I have some non-restful actions that I've added. I haven't added any ROUTES for them, however, using normal text rendering works fine. It's when I start requiring different "swf" and "js" files (files which are properly placed in PUBLIC) that things get hairy. I start receiving "406 Not Acceptable" errors telling me that it's looking for the files in a subdirectory of the current controller. As it stands I'm in including the JS in "application" layout file. It works for the INDEX action, but doesn't seem to work for any of the non-restful actions. Thoughts?

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