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• Convert the code from PHP to Ruby on rails

  - by theband

  public function getFtime() { $records=array(); $sql="SELECT * FROM `finishedtime`"; $result=mysql_query($sql); if(!$result){throw new Exception(mysql_error());} if(mysql_num_rows($result)==0){return $records;} while($row=mysql_fetch_assoc($result)){$records[]=$row;} return $records; } I am in the process of learning Ruby, can anyone convert this code into Ruby. This will make me construe on how to run a query and thrown the fetched result back.

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• Rails 3: habtm migration, primary key issue

  - by Brian Wigginton

  I'm trying to setup a migration file for a habtm relationship, however when I run the migration I'm getting the following error: Primary key is not allowed in a has_and_belongs_to_many join table (parts_vehicles). Here is my migration file (20110111035950_create_parts_vehicles.rb): class CreatePartsVehiclesJoinTable < ActiveRecord::Migration def self.up create_table :parts_vehicles, :id => false do |t| t.integer :part_id t.integer :vehicle_id end end def self.down drop_table :parts_vehicles end end The documentation example states to use :id => false to disable a primary key from being generated, but I'm still getting the error.

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• Ruby on Rails : How can i display data for the current view from a different table

  - by krishkule

  This might be a easy-to-answer question, but its a pain in the bum for me.... So... I have two tables - Chords - |id|chord|name|rating|artist_id| Artists - |id|artist| (the relations : chords : belongs_to :artist artists : has_many :chords ) And in the index page for "chords" i want to display chord,name,rating from Chords table AND artist from the Artists table this is the code for the chrod's index.html.erb : <table border="1"> <%@chords.each do |chord|%> <tr> <td><%=chord.artist.artist%></td> <td><%= link_to chord.name, chord %></td> <td><%=chord.rating%></td> <td><%= chord.created_at %></td> </tr> <%end%> </table> The error message is : undefined method `artist' for nil:NilClass Actually, at first it worked, but when i started to create the "new.html.erb" page and the create,new controllers, it stopped working - thats why this is so confusing for me! I will be glad to hear any critique and suggestions! Thank you

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• rails: undefined method and form_tags

  - by SuperString

  I have this in courses.html.erb under app/views/students <% if @student.courses.count < Course.count then%> <% form_tag(course_add_student_path(@student)) do%> <%= select_tag(:course, options_from_collection_for_select(@student.unenrolled_courses, :id, :name))%> <%= submit_tag 'Enroll'%> <%end%> <%else%> <p><%=h @student.name%> is enrolled in every course. </p> <%end%> I have this in my students_controller.rb under app/controllers: def course_add @student = Student.find(params[:id]) @course = Course.find(params[:course]) unless @student.enrolled_in?(@course) @student.coursess << @course flash[:notice] = 'course added' else flash[:error] = 'course already enrolled' end redirect_to :action => courses, :id => @student end And in my routes.rb, I have: resources :students, :has_many => [:awards], :member => {:courses => :get, :course_add => :post, :course_remove => :post} However, I am getting this error: undefined method `course_add_student_path' for #<#<Class:0x105321d78>:0x1053200e0> What am I missing here? Rake routes output: students GET /students(.:format) {:action=>"index", :controller=>"students"} POST /students(.:format) {:action=>"create", :controller=>"students"} new_student GET /students/new(.:format) {:action=>"new", :controller=>"students"} edit_student GET /students/:id/edit(.:format) {:action=>"edit", :controller=>"students"} student GET /students/:id(.:format) {:action=>"show", :controller=>"students"} PUT /students/:id(.:format) {:action=>"update", :controller=>"students"} DELETE /students/:id(.:format) {:action=>"destroy", :controller=>"students"} courses GET /courses(.:format) {:action=>"index", :controller=>"courses"} POST /courses(.:format) {:action=>"create", :controller=>"courses"} new_course GET /courses/new(.:format) {:action=>"new", :controller=>"courses"} edit_course GET /courses/:id/edit(.:format) {:action=>"edit", :controller=>"courses"} course GET /courses/:id(.:format) {:action=>"show", :controller=>"courses"} PUT /courses/:id(.:format) {:action=>"update", :controller=>"courses"} DELETE /courses/:id(.:format) {:action=>"destroy", :controller=>"courses"} student_awards GET /students/:student_id/awards(.:format) {:action=>"index", :controller=>"awards"} POST /students/:student_id/awards(.:format) {:action=>"create", :controller=>"awards"} new_student_award GET /students/:student_id/awards/new(.:format) {:action=>"new", :controller=>"awards"} edit_student_award GET /students/:student_id/awards/:id/edit(.:format) {:action=>"edit", :controller=>"awards"} student_award GET /students/:student_id/awards/:id(.:format) {:action=>"show", :controller=>"awards"} PUT /students/:student_id/awards/:id(.:format) {:action=>"update", :controller=>"awards"} DELETE /students/:student_id/awards/:id(.:format) {:action=>"destroy", :controller=>"awards"} courses_student GET /students/:id/courses(.:format) {:action=>"courses", :controller=>"students"} GET /students(.:format) {:action=>"index", :controller=>"students"} POST /students(.:format) {:action=>"create", :controller=>"students"} GET /students/new(.:format) {:action=>"new", :controller=>"students"} GET /students/:id/edit(.:format) {:action=>"edit", :controller=>"students"} GET /students/:id(.:format) {:action=>"show", :controller=>"students"} PUT /students/:id(.:format) {:action=>"update", :controller=>"students"} DELETE /students/:id(.:format) {:action=>"destroy", :controller=>"students"}

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• Specing remember_me feature in rails + restful_authentication

  - by Thiago

  Hi there, I want to run a the following example in cucumber: Scenario: Anonymous user can log in and be remembered Given I am logged in with reminder When I navigate away And I go to the list of cornetas Then I should be logged in But I don't know how to write the "And I navigate away" step. I already tried to "visit stackoverflow.com" or "visit http://stackoverflow.com", but with no success. Any suggestions? I guess I could also destroy the webrat session, but I don't know how to do it, neither if it would work.

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• Ruby on Rails AJAX call affects only the first element in collection

  - by pruett

  I'm iterating over a collection of elements and trying to get AJAX to work properly on a specific element within the collection. I'm nesting a few partials in order to iterate over these items and use a js.erb call like this: $('#favorite_form').html("<%=j render partial: 'shared/unfavorite', locals: { mission: @mission } %>"); This only seems to change the 1st item in the collection even though I could be clicking the 5th item down the list, for example. Question: How can I specify (via .js and AJAX) which element to update? Is this jQuery call not specific enough to the individual element? The code works in regular HTTP requests, so I'm wondering if there is a way to specify the individual element, but I thought that's what partials did :/ Example View ( _favorites.html.erb ) <div id="favorite_form"> <% if you_favorited_this?(current_user, mission) %> <%= render partial: 'shared/unfavorite', locals: { mission: mission } %> <% else %> <%= render partial: 'shared/favorite', locals: { mission: mission } %> <% end %> </div>

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• Rails 3 ActiveRecord group_by sort by count

  - by Craig

  The following view code generates a series of links with totals (as expected): <% @jobs.group_by(&:employer_name).sort.each do |employer, jobs| %> <%= link_to employer, jobs_path() %> <%= "(#{jobs.length})" %> <% end %> However, when I refactor the view's code and move the logic to a helper, the code doesn't work as expect. view: <%= employer_filter(@jobs_clone) %> helper: def employer_filter(jobs) jobs.group_by(&:employer_name).sort.each do |employer,jobs| link_to employer, jobs_path() end end The following output is generated: <Job:0x10342e628>#<Job:0x10342e588>#<Job:0x10342e2e0>Employer A#<Job:0x10342e1c8>Employer B#<Job:0x10342e0d8>Employer C#<Job:0x10342ded0>Employer D# What am I not understanding? At first blush, the code seems to be equivalent.

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• Rails- MiniMagick commands not working

  - by digitalWestie

  I'm running windows xp and I've got MiniMagick and ImageMagick installed (latest versions). I'm now using the console to test out that everything works. Using the ms command prompt image magick works no problem. I'm testing this by using the identify command. Now, when I try to use MiniMagick from the console by entering image = MiniMagick::Image.new('image.jpg') It returns MiniMagickError, "ImageMagick command ("identify \"input.jpg\"") failed: {:status_code = #"'identify' is not recognized as an internal or external command,\noperable program or batch file.\n"} Can anybody help?

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• Ruby On Rails: Ask for Confirmation When Table Entry Associated With Another Is Destroyed

  - by Train Main

  Hi all, I would like some assistance with the following problem: I have a table of groups that is self-associated with itself, so each group is (optionally) linked to another in a hierarchical fashion. I want to write some code that will somehow check before the destruction of a group entry, if it has any children, and ask the user for confirmation, or whether they wish to delete the child groups as well. I've looked at callbacks, but I don't know how to get the confirmation request to the end user in the view, and then get the response back to the model's callback. Thanks

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• Rails 3 refactoring issue

  - by Craig

  The following view code generates a series of links with totals (as expected): <% @jobs.group_by(&:employer_name).sort.each do |employer, jobs| %> <%= link_to employer, jobs_path() %> <%= "(#{jobs.length})" %> <% end %> However, when I refactor the view's code and move the logic to a helper, the code doesn't work as expect. view: <%= employer_filter(@jobs_clone) %> helper: def employer_filter(jobs) jobs.group_by(&:employer_name).sort.each do |employer,jobs| link_to employer, jobs_path() end end The following output is generated: <Job:0x10342e628>#<Job:0x10342e588>#<Job:0x10342e2e0>Employer A#<Job:0x10342e1c8>Employer B#<Job:0x10342e0d8>Employer C#<Job:0x10342ded0>Employer D# What am I not understanding? At first blush, the code seems to be equivalent.

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• cattr_accessor outside of rails

  - by JP

  I'm trying to use the google_search ruby library (code follows) but it complains that 'cattr_accessor is an undefined method' - any ideas why this might be or how I could fix it? require 'rubygems' require 'google_search' GoogleSearch.web :q => "pink floyd"

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• Rails 3.0 method_missing: undefined method in validator

  - by user567592

  == Schema Information Schema version: 20110111000403 # Table name: places # id :integer not null, primary key name :string(255) latitude :float longitude :float a place can be defined by latitude and longitude or by name # class Place < ActiveRecord::Base validates_precence_of :name, :if = lat_long_not_def? def lat_long_not_def? latitude.blank? || longitude.blank? end end

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• Space (and pipe sign) works on occasion only

  - by Timo Riikonen

  I have an issue that when I try to write pipe sign "|" and space after that, I sometimes get wrong type of space (\240) and my command fails. This issue persists on different shells. How could I fix this? I am using Finnish keyboard layout. timo@timo-i7-ubuntu:~$ ps -ef | grep ruby timo 7169 2633 0 12:12 pts/2 00:00:00 ruby1.9.1 /usr/local/bin/rails new admin4 timo 8736 26515 0 14:22 pts/4 00:00:00 grep --color=auto ruby timo@timo-i7-ubuntu:~$ ps -ef | grep ruby No command ' grep' found, did you mean: Command 'igrep' from package 'openimageio-tools' (universe) Command 'dgrep' from package 'debian-goodies' (main) Command 'rgrep' from package 'grep' (main) Command 'zgrep' from package 'gzip' (main) Command 'zgrep' from package 'zutils' (universe) Command 'sgrep' from package 'sgrep' (universe) Command 'lgrep' from package 'lv' (universe) Command 'egrep' from package 'grep' (main) Command 'ngrep' from package 'ngrep' (universe) Command 'grep' from package 'grep' (main) Command 'agrep' from package 'agrep' (multiverse) Command 'pgrep' from package 'procps' (main) Command 'xgrep' from package 'xgrep' (universe) Command 'vgrep' from package 'atfs' (universe) Command 'fgrep' from package 'grep' (main)  grep: command not found timo@timo-i7-ubuntu:~$ cat pipecom ps -ef | grep rails timo@timo-i7-ubuntu:~$ cat pipecom2 ps -ef | grep rails timo@timo-i7-ubuntu:~$ ./pipecom timo 7169 2633 0 12:12 pts/2 00:00:00 ruby1.9.1 /usr/local/bin/rails new admin4 timo 8777 8775 0 14:26 pts/4 00:00:00 grep rails timo@timo-i7-ubuntu:~$ ./pipecom2 ./pipecom2: line 1: $'\302\240grep': command not found timo@timo-i7-ubuntu:~$ diff -w pipecom pipecom2 1c1 < ps -ef | grep rails --- > ps -ef | grep rails

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• Cisco 877 as PPPoA/PPPoE bridge (no routing) - how to make it listen to IP for management?

  - by Ingmar Hupp

  I have a Cisco 877 configured to bridge ADSL with PPPoA to PPPoE on Vlan1. This works fine, but in this mode the only way I can configure the Cisco is via the serial console. I'd like to have the Cisco also listen on an IP address so I can telnet/ssh into it. I think the right way to go about this would be via bridge irb, but I'm not sure exactly how (or if that's even the right direction). IOS is 12.4T and my current config (cut down to essentials) is: no ip routing no ip cef ! ! interface ATM0 no ip address no ip route-cache no atm ilmi-keepalive pvc 0/38 encapsulation aal5snap ! dsl operating-mode auto bridge-group 1 ! ! interface Vlan1 no ip address no ip route-cache bridge-group 1 Just setting an IP address on Vlan1 didn't have the desired effect, but surely this must be possible somehow (the Draytek Vigor 120 even does it by default).

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• How to configure ARR - Application Request Routing - to run both as web server and as as a gateway or proxy?

  - by Different111222

  I have this IIS7.5 with ARR installed and configured to reverse proxy to another server which is running IIS7. On that IIS7.5 I have applications and simple websites installed. Since configuring a farm, the local application doesn't run with this error message: 502 - Web server received an invalid response while acting as a gateway or proxy server. There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server. Is it even possible to run both application and routing (reverse proxy) at the same time?

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• Can I use static routing to allow me to use my public IP from my LAN?

  - by jnm2

  I would like to be able to use the same hostname to connect to my computer from my phone whether I'm at home or away. Currently I have to maintain duplicate entries for remote desktop, for instance. My router doesn't seem to have a NAT loopback option. I have two routers in fact, a cable modem which goes straight to my main router which does wireless. I can add to the static routing tables on each. Can I use this to loopback the public IP or do I need different routers?

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• How failover should work in IIS cluster with Application Request Routing?

  - by username

  I have set up several servers with IIS and connected them to the load balancer - server with installed IIS Application Request Routing. I have created a server farm and added two servers. Then I stopped IIS on the first server and tried to open my web site. It returned me an error: 502 - Web server received an invalid response while acting as a gateway or proxy server. But if instead of stopping IIS I shut down the first server, I'm getting a response from the next server which is online. The question is, what the expected behaviour should be for failover with ARR, should it switch me to the next server if IIS is stopped and server is online?

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• « Le TDD est mort » pour le créateur de Ruby on rails, une position qui divise la communauté agile

  Le TDD est mort ? Non, pas vraiment, peut-être que oui La communauté agile taraudée par un débat autour du TDD« Le TDD est mort ? Ou pas ? » Telle est la question qui taraude l'esprit de la communauté agile en ce moment, vu l'importance du TDD (Test Driven Development ? Développement piloté par les tests) dans l'une des méthodes agiles les plus réputées : la méthode XP.À l'origine de ce débat houleux, David Heinemeier Hansson (DHH) auteur de Ruby on rails et fondateur du Basecamp et ses deux posts...

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• Are Ruby on Rails / Grails the fastest frameworks for getting sites up quickly?

  - by Jon

  I'm considering using Grails for a new website, but am open to other/new programming languages and frameworks. I have done development using J2EE/JSF2, ASP.NET, and PHP. Is Grails or Ruby on Rails pretty much the best way to get functionality up and running quickly? Some initial thoughts: DJango looks similar to RoR/Grails and I'd consider it GWT is an interesting concept but it doesn't seem like turnaround time is quite as fast Thanks, -Jon

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• Is it possible to make/translate a 3d engine to ruby on rails?

  - by user20529

  I am looking to make a 3D FPS that runs inside web browsers. I looked into using WebGL, but it didn't seem far enough along into development. I decided on using RoR because Ruby was a language I knew. I realize this may seem like a ridiculous question, but is there any way I can port/rewrite/whatever a game engine(Say for instance IrrLicht) to run inside Rails? Or for that matter, any other language on the web.

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• Le kit du bon développeur Rails, partie 3. Par l'équipe de Synbioz

  Dernière partie de notre série d'articles sur les gems à connaitre par un développeur Rails. Dans le premier article, nous nous étions attardés sur l'authentification, la recherche et la pagination. Dans la deuxième partie, ce fut au tour de l'internationalisation et de la gestion de fichiers. Dans ce dernier article, les gems concernant les tests et la gestion des tâches annexes seront à leur tour abordées.

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• Which server software and configuration to retrieve from multiple POP servers, routing by address to correct user

  - by rolinger

  I am setting up a small email server on a Debian machine, which needs to pick up mail from a variety of POP servers and figure out who to send it to from the address, but I'm not clear what software will do what I need, although it seems like a very simple question! For example, I have 2 users, Alice and Bob. Any email to [email protected] ([email protected] etc) should go to Alice, all other mail to domain.example.com should go to Bob. Any email to [email protected] should go to Bob, and [email protected] should go to Alice Anything to *@bobs.place.com should go to Bob And so on... The idea is to pull together a load of mail addresses that have built up over the years and present them all as a single mailbox for Bob and another one for Alice. I'm expecting something like Postfix + Dovecot + Amavis + Spamassassin + Squirrelmail to fit the bill, but I'm not sure where the above comes in, can Postfix deal with it as a set of defined regular expressions, or is it a job for Amavis, or something else entirely? Do I need fetchmail in this mix, or is its role now included in one of the other components above. I think of it as content-filtering, but everything I read about content-filtering is focussed on detecting spam rather than routing email.

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• RRAS Problem routing to central site from RRAS server only?

  - by TomTom

  Given is an office connected to headquarters using a RRAS bridge (2 virtual machines using RRAS to route between the two networks). Naming: The office is A, the RRAS on A is a-lnk. THe headquartters is B, b-lnk the RRAS machine there. The VPN works perfectly - machines can ping and work between the sites. Domain controllers on both ends replicating, DFS working, remote desktop working. All in all... everything is fine. EXCEPT: a-lnk itself can not reach any machine in B. This would normally not be troublesome (noone ever does anything on a-lnk), but there are two exceptions: * a-lnk is supposed to get it's license from a KMS in B, so not being able to reach B means it is not prolonging. * a-lnk is supposed to pull updates from a WSUS in B - and not being able to reach B means - no updates. Given that thigns work (and security is a minor issue - A-lnk is not reachable from the internet as it is behing a NAT hardware anyway) this got not handled for months. I just wan to get this item ticked off now. Anyone an idea what this is? It definitely is not a "dns does not work" or "routing in general is bad" item, as any computer in A can connect to any computer in B, and the other way arount - only the RRAS computer itself seems to do something really awkward. Platform for both: 2008 R2 standard.

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• How to configure DD-WRT routing table when creating an isolated network segment for PCI C VT compliance

  - by tetranz

  I'm the volunteer support and system admin person at a small private school. We need to setup a PCI compliant Windows PC as a virtual terminal for credit card processing. I've read questionnaire SAQ C-VT and, to quote, this computer needs to be accessed: "via a computer that is isolated in a single location, and is not connected to other locations or systems within your environment (this can be achieved via a firewall or network segmentation to isolate the computer from other systems)" Our setup is as follows: DSL modem from ISP is setup to be a "transparent pipe" with no extra services. That goes into the WAN port of Linksys WRT54-GL running a DD-WRT. The LAN is 192.168.1.x. There are a couple of other WRT54-GL / DD-WRT devices. One is used as a wireless AP and another is a client bridge. To isolate the VT (virtual terminal) machine, I have another DD-WRT device. Its WAN is connected to a port on the 192.168.1.x LAN. The virtual terminal machine is connected to its LAN which is at 192.168.10.x. The SPI Firewall etc is turned on. It's basically the default DD-WRT gateway setup where the "ISP" is our own LAN. That's working. All incoming traffic to the VT machine is blocked, including from our own LAN. The VT can access the internet BUT, and here's the problem, it can also ping any of the computers on the 192.168.1.x LAN. I think I need to stop that. I'm guessing that I could do something with the Static Routing table in the VT machine's DD-WRT device. I need to route anything going to 192.168.1.x other than the gateway which is 192.168.1.1 to 0.0.0.0 or something like that. That's where I'm stuck at the end of my knowledge. Or ... do I need to get yet another DD-WRT so the network is "balanced". Maybe I need to have the internet from the DSL going into a DD-WRT which has only two devices on its LAN i.e., two other DD-WRTs, one for the main LAN and one for the VT. I think that would do but I'd like to avoid the extra cost and complexity if I don't need it. Thanks

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• How do I correctly set up Application Request Routing in IIS7 to route SSL requests?

  - by Matthew Belk

  I have a 3-node web farm being managed by IIS7 and Application Request Routing. I have a folder hierarchy in my web app that needs to be secured via SSL. What is the best practice for getting ARR to correctly route these SSL requests? I have installed the same certificate on all web farm servers and the server running ARR. I have tried enabling and disabling the SSL Off-loading feature Thanks, Matthew

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