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• How to get array with clear data from Active Record query without using map

  - by Suborx

  Hi I would like to ask if its possible get array with clear data from ActiveRecord query without using map, collect or each. names = User.find(:all, :select => "name") return names == [#<User name:"Peter">,#<User name:"Martin">] and I want names == ["Peter", "Martin"] without using map, collect or each. Thanks for your answers.

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• How can I save an entire list of items true or false?

  - by JZ

  I'm following Ryan Bates, Railscast episode 52 and I've translated relevant parts of the code to work with Rails 3.0.0.beta2. In Ryan's case, he simply marks items incomplete and saves a timestamp. If an Item contains a timestamp the model returns the item in the completed list. I'm attempting to save ALL values true or false, depending on whether the check_box_tag is selected or not (using boolean). I am able to save ONLY selected items, true or false. How can I save an entire list of items true or false, depending on whether the checkbox is selected? The following is my attempt: controller logic: def yardsign Add.update_all(["yardsign=?", true], :id => params[:yard_ids]) redirect_to adds_path end html.erb: <%= form_tag yardsign_adds_path, :method => :put do %> <% @adds.each do |add| %> <td><%= check_box_tag "yard_ids[]", add.id %></td> <% end %> <% end %> routes.rb resources :adds do collection do put :yardsign end end Terminal Started POST "/adds/yardsign" for 127.0.0.1 at 2010-04-15 19:22:49 Processing by AddsController#yardsign as HTML Parameters: {"commit"=>"Update", "yardsigntakers"=>["1", "2"], "authenticity_token"=>"3arhsxg/Ky+0W7RNM2T3QditMTJmOnLR5CqmMYWN4Qw="} User Load (0.3ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 1) LIMIT 1 SQL (1.8ms) UPDATE "adds" SET yardsign='t' WHERE ("adds"."id" IN (1, 2)) Redirected to http://localhost:3000/adds

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• Resources for widget creation

  - by Kenji Crosland

  My rails app is about to go live and I'm trying to figure out how to create a widget based on data on the site. My Javascript is not too hot--limited to the O'reilly head first book on JS. I can read simple Javascript okay but when it comes to writing it I'm a little lost. That said, I hope to roll out a widget, maybe a wordpress plugin too soon after my app is launched. Does anyone know of any rails plugins, javascript templates, tutorials or books that can get me going? I did ask a similar question before here: But my limited knowledge of JS kept me from implementing the suggested answer properly.

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• ActiveScaffold custom action_link that should respond like update

  - by doug316

  I have a custom action link which is :inline and :post. It's a quick-link to update an attribute, and that part works just fine. After the action, my intent is to respond just like it was an update, so the row is re-rendered in the index. After the record is updated in my controller action, I call respond_to_action(:create) Just like in the create method in active scaffold. It seems like the content of the javascript response is returned correctly to the client, however, the problem: The content-type of the response header is "text/html" instead of "text/javascript", unlike with an actual update. So the JS is not executed and the row doesn't update. I can't figure out what the difference could possibly be here, I've traced extensively and even have replaced the respond_to_action with: respond_to do |format| format.js do render ... end end And it still won't set the content-type like every other action in the app. Anybody have a clue here? Something in active scaffold must be overriding the content-type and I can't figure out what it might be. Surprising this isn't documented, this doesn't seem like an unusual use-case, making an action a slave to the update re-render.

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• Rails fields_for parameters for a has_many relation don't yield an Array in params

  - by user1289061

  I have a model Sensor with has_many and accepts_nested_attributes_for relationships to another model Watch. In a form to update a Sensor, I have something like the following <%= sensor_form.fields_for :watches do |watches_form| %> <%= watches_form.label :label %><br /> <%= watches_form.text_field :label %> <% end %> This is indended to allow editting of the already-created Watches belonging to a Sensor. This call spits form inputs as so: <input name="sensor[watches_attributes][0][label]" ... /> <input name="sensor[watches_attributes][0][id]" ... /> When this gets submitted, the params object in the Sensor controller gets an assoc like "sensor" => { "id"=>"1", "watches_attributes"=> { "0"=>{"id" => "1", "label" => "foo"}, "1"=>{"id" => "2", "label" => "bar"} } } For a has_many, accepts_nested_attributes_for update to work upon the @sensor.update_attributes call, it seems that that attributes key really must map to an Array. From what I've seen in the examples, the combination of has_many, accepts_nested_attributes_for, and sensor_form.fields_for should allow me to pass the resulting params object directly to @sensor.update_attributes and update each related object as intended. Instead the Sensor takes place, with no errors, but the Watch objects are not updated (since "watches_attributes" maps to a Hash instead of an Array?) Have I missed something?

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• SyntaxError: Parse Error only happens in safari

  - by Josh Crowder

  Im getting SyntaxError: Parse Error, only on safari. Here is the code in question. <script type="text/javascript"> // I am using transloadit a jquery plugin. which works on every other page and is loading fine on safari by the looks of it. The errors is on line 44 which is export: { Can anyone see anything wrong with that page?

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• Appending empty query string param to the URL in Rails

  - by Termopetteri

  Is there a way to append something to the query string with no value set? I would like to see this kind of URL being generated: http://local/things?magic. What I'm looking for is when the user goes to http://local/other?magic then every URL in the generated page would contain magic in the end. Following code is almost a solution but it gives me http://local/things?magic=. There is an extra = that I don't want there. def default_url_options(options) if params.has_key?("magic") { :magic => "" } end end Setting { :magic => nil } will remove the magic entirely from the generated URLs.

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• Rails requires RubyGems >= 1.3.2. Please install RubyGems and try again (I have rubygems 1.3.6!)

  - by iambatman

  I'm running rails version 2.3.5 and rubygems version 1.3.6, when I script/server I get this error Rails requires RubyGems = 1.3.2. Please install RubyGems and try again:http://rubygems.rubyforge.org any ideas how to fix this?

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• Can you let users upload Sinatra apps and run them inside Rails as middleware?

  - by Brian Armstrong

  I want to let users write small custom apps (think themes or plugins on Wordpress) and upload/run them on my site. I'm thinking about using Sinatra apps for this since it would give the users a lot of flexibility, and then running them as middleware inside my rails app. But I can't figure out the security implications of this. I tried creating a simple sinatra app as middleware, and it has access to all the rails models and everything - so that is bad. Is there a way for rack to keep these separate so that the sinatra apps are effectively sandboxed and can't do any bad things (outside of an API or some specific way I setup for them to communicate)? There may be an easier way to accomplish this that I haven't thought of too, so ideas welcome. Thanks!

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• UUIDs in Rails3

  - by Rob Wilkerson

  I'm trying to setup my first Rails3 project and, early on, I'm running into problems with either uuidtools, my UUIDHelper or perhaps callbacks. I'm obviously trying to use UUIDs and (I think) I've set things up as described in Ariejan de Vroom's article. I've tried using the UUID as a primary key and also as simply a supplemental field, but it seems like the UUIDHelper is never being called. I've read many mentions of callbacks and/or helpers changing in Rails3, but I can't find any specifics that would tell me how to adjust. Here's my setup as it stands at this moment (there have been a few iterations): # migration class CreateImages < ActiveRecord::Migration def self.up create_table :images do |t| t.string :uuid, :limit => 36 t.string :title t.text :description t.timestamps end end ... end # lib/uuid_helper.rb require 'rubygems' require 'uuidtools' module UUIDHelper def before_create() self.uuid = UUID.timestamp_create.to_s end end # models/image.rb class Image < ActiveRecord::Base include UUIDHelper ... end Any insight would be much appreciated. Thanks.

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• Rails Dreamhost Cron Job

  - by Sam

  I'm trying to get some cron jobs going through Dreamost using their panel. I'm also using rake to execute these jobs My rake files are located in app/lib/tasks/example.rake But I don't know what code to give the panel to execute them

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• rails HABTM versus view (formtastic)

  - by VP

  I have two models: The model NetworkObject try to describe "hosts". I want to have a rule with source and destination, so i'm trying to use both objects from the same class since it dont makes sense to create two different classes. class NetworkObject < ActiveRecord::Base attr_accessible :ip, :netmask, :name has_many :statements has_many :rules, :through =>:statements end class Rule < ActiveRecord::Base attr_accessible :active, :destination_ids, :source_ids has_many :statements has_many :sources, :through=> :statements, :source=> :network_object has_many :destinations, :through => :statements, :source=> :network_object end To build the HABTM i did choose the Model JOIN. so in this case i created a model named Statement with: class Statement < ActiveRecord::Base attr_accessible :source_id, :rule_id, :destination_id belongs_to :network_object, :foreign_key => :source_id belongs_to :network_object, :foreign_key => :destination_id belongs_to :rule end The problem is: is right to add two belongs_to to the same class using different foreign_keys? I tried all combinations like: belongs_to :sources, :class_name => :network_object, :foreign_key => :source_id but no success.. anything that i am doing wrong?

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• Why does a JRuby application on App Engine take so long to start?

  - by Major Tom

  I'm considering using JRuby on App Engine but have heard that Juby app on App Engine have a long startup lag. Why is this? Is it because the JRuby jar files are so large that a cold startup requires them to be loaded into memory before the app can start serving? That would be my guess but I'm not sure if that's a precise technical explanation.

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• Dynamic find methods Vs conditional statements in rails

  - by piemesons

  Hello Student.find_all_by_name_and_status(‘mohit’, 1) As this will create a exception 'No method exception' first then it will be handled by dynamic Method handler and this will not Student.find(:all, :conditions => [‘name = ? and status = ?’ ‘mohit’, 1]) Does Student.find(1) Will generate method missing exception and will it prevent SQL injection?

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• Using JSON Data to Populate a Google Map with Database Objects

  - by MikeH

  I'm revising this question after reading the resources mentioned in the original answers and working through implementing it. I'm using the google maps api to integrate a map into my Rails site. I have a markets model with the following columns: ID, name, address, lat, lng. On my markets/index view, I want to populate a map with all the markets in my markets table. I'm trying to output @markets as json data, and that's where I'm running into problems. I have the basic map displaying, but right now it's just a blank map. I'm following the tutorials very closely, but I can't get the markers to generate dynamically from the json. Any help is much appreciated! Here's my setup: Markets Controller: def index @markets = Market.filter_city(params[:filter]) respond_to do |format| format.html # index.html.erb format.json { render :json => @market} format.xml { render :xml => @market } end end Markets/index view: <head> <script type="text/javascript" src="http://www.google.com/jsapi?key=GOOGLE KEY REDACTED, BUT IT'S THERE" > </script> <script type="text/javascript"> var markets = <%= @markets.to_json %>; </script> <script type="text/javascript" charset="utf-8"> google.load("maps", "2.x"); google.load("jquery", "1.3.2"); </script> </head> <body> <div id="map" style="width:400px; height:300px;"></div> </body> Public/javascripts/application.js: function initialize() { if (GBrowserIsCompatible() && typeof markets != 'undefined') { var map = new GMap2(document.getElementById("map")); map.setCenter(new GLatLng(40.7371, -73.9903), 13); map.addControl(new GLargeMapControl()); function createMarker(latlng, market) { var marker = new GMarker(latlng); var html="<strong>"+market.name+"</strong><br />"+market.address; GEvent.addListener(marker,"click", function() { map.openInfoWindowHtml(latlng, html); }); return marker; } var bounds = new GLatLngBounds; for (var i = 0; i < markets.length; i++) { var latlng=new GLatLng(markets[i].lat,markets[i].lng) bounds.extend(latlng); map.addOverlay(createMarker(latlng, markets[i])); } } } window.onload=initialize; window.onunload=GUnload;

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• Sending data remotely from iPhone native apps to Rails apps

  - by jpartogi

  Dear all, I have decided to develop a native iPhone apps as a compliment to our webapps. Now I am wondering what are my options to send data remotely from the iPhone apps - since the database is online - to our online database. What I can think of on top of my head - since I come from web dev background - is JSON. My webapps is built using Rails, so I figure it would not be difficult to accept JSON request from the iPhone apps. But the next question is, is it difficult to send JSON data remotely from the iPhone apps? If JSON is not recommendable, what are my other options? Thank you so much for the assistance. Really appreciate it.

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• Is there any web service for getting tidal information?

  - by thor

  Has anyone come across a web service or plugin/code/calculation for getting information on tides - namely high and low tide times? I only need this information for one location (outwith the US) but I need it on an ongoing basis so a web service that I can hit once a day or something would be ideal.

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• Showing response time in a rails app.

  - by anshul

  I want to display a This page took x seconds widget at the bottom of every page in my rails application. I would like x to reflect the approximate amount of time the request spent on my server. What is the usual way this is done in Rails?

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• Trouble with authlogic_rpx

  - by Andrei

  Hi, I'm trying to run http://github.com/tardate/rails-authlogic-rpx-sample (only rails version was changed) but get error message http://gist.github.com/385696, when RPX returns information after successful authentication via Google Account. What is wrong here? And how I can fix it? The code was successfully tested with rails 2.3.3 by its author: http://rails-authlogic-rpx-sample.heroku.com/ I run on Windows with cygwin and rails (2.3.5), rpx_now (0.6.20), authlogic_rpx (1.1.1). Update In several hours RPX rejected my app http://img96.imageshack.us/img96/2508/14128362.png

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• Rails show latest entry

  - by Danny McClelland

  Hi Everyone, I have a working Rails application on version 2.3.5 - I am using many to many model relations and have got almost everything working. What I would like to do is on my new kase page show the most recent kase job ref at the top. So for example, if I created a new kase with a job ref of "001", if I then went to create a new kase it would show at the top "Your previous kases reference was 001". I have the field of jobref in the new kase form, so I am trying to workout what I need to do to output only the last jobref. If that makes sense! Thanks, Danny

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• a better way to initialize database ONCE when rail server starts

  - by Hadi

  i would like to initialize database the first time the server is started, that involve calling a class method. Given the class name is: Product At first i put an .rb file config\initializers\init.rb as it gets automatically called. Everything works ok, until the database is deleted, and i am trying to do rake db:migrate. rake db:migrate fails saying that cannot find 'product' table. inside init.rb = Product.populate_db The solution i came up is: I took out init.rb do rake db:migrate put back init.rb run the server. My rails application is mainly for reporting and the data is seeded from other application, so i have to do the above step everyday Is there a better way to do the initialization?

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• ActiveMerchant - Optimal method of sending money to user? PayPal account or Credit

  - by Kevin

  I have a website that will take payments from user A, hold them in our escrow account, then transfer the money minus a fee to user B. I have the first part figured out, in terms of taking credit card payments from user A, but I'm trying to figure out the optimal method of taking that money and sending it to user B. I'm not storing credit card info due to privacy and I don't mind requiring user B to sign up for a PayPal account if they're going to use the system but I don't know how to directly send payments to a PayPal account. I'm using ActiveMerchant and the PayPal gateway on Rails 2.3.5. I'm also open to any suggestions as to what the optimal method is to take money from user A, hold it for 1-60 days, then transfer it to user B while incurring minimal fees and something I can implement in Rails hopefully that won't cause me to have an aneurysm.

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• Save has_and_belongs_to_many link in basic RoR app

  - by Stéphane V

  I try to learn the has_and_belongs_to_many relationship between my 2 fresh new and simple models Product and Author, where a Product can have many authors and where author can have a lots of products. I wrote this : class Author < ActiveRecord::Base has_and_belongs_to_many :products end class Product < ActiveRecord::Base has_and_belongs_to_many :authors end In the partial form of view for the products, I have : <p>Products</p> <%= collection_select(:product, :author_ids, @authors, :id, :name, :prompt => " ", :multiple => true) %> but when I hit the update button, I get this strange message I can't resolve myself : NoMethodError in ProductsController#update undefined method `reject' for "1":String Rails.root: /home/stephane/www/HABTM Application Trace | Framework Trace | Full Trace app/controllers/products_controller.rb:63:in block in update' app/controllers/products_controller.rb:62:inupdate' Request Parameters: {"utf8"="✓", "_method"="put", "authenticity_token"="2GlTssOFjTVZ9BikrIFgx22cdTOIJuAB70liYhhLf+4=", "product"={"title"="Le trésor des Templiers", "original_title"="", "number"="1", "added_by"="", "author_ids"="1"}, "commit"="Update Product", "id"="1"} What's wrong ? Is there a problem with :product_ids... I saw on internet I had to pu a "s" but I'm not sure of what it represents.... How can I link the table authors_products to the key which is given back by the drop-down menu ? (here "author_ids"="1") Thx !

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• Rails 3.1 assets not recognizing new images uploaded by rmagick until server restart

  - by Mr_Nizzle

  I have my Rails 3.1.0 application running with passenger in production environment and I have a section where the application allows the user to change his profile picture so I upload the image using an ajax uploader and in my controller I upload the file and generate different sizes for the image with rmagick then I render the new image with an image_tag but the application won't show the image till I restart the server. What I get is No route matches [GET] "assets/path/to/image.png" If I restart the server It will show the image, but obviously I can't be restarting the server every once a user uploads a new image. How can I solve the keeping the assets working the right way?

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• Merging Passed Parameters

  - by Josh Crowder

  I have a two data arrays sent in from a form, one called transloaded and the other video which is the actual form for the model. I need to get [:video_encoded][:url] and save that to [:video][:flash_url] This is the passed arguments or transloaded, when I try and access [:transload][:results][:video_encode] I get nil. print params[:transload] { "assembly_id":"d59b4293b3d79d2ccd1948c02421c6a6", "status":"success", "uploads":{ "video":{ "name":"bbc_one.mp4", "mime":"video/mp4", "ext":"mp4", "size":601104, "meta":{ "width":720, "height":404, "video_fps":25, "video_bitrate":null, "video_format":"avc1", "video_codec":"ffh264", "audio_bitrate":"128k", "audio_codec":"faad", "duration":3.07, "device_vendor":null, "device_name":null, "device_software":null, "latitude":null, "longitude":null }, "url":"http://tmp.transloadit.com/" } }, "results":{ "video_encode":{ "name":"bbc_one.flv", "mime":"video/x-flv", "steps":["encode","export"], "ext":"flv", "size":388317, "meta":{ "width":480, "height":320, "video_fps":25, "video_bitrate":"512k", "video_format":"FLV1", "video_codec":"ffflv", "audio_bitrate":"64k", "audio_codec":"mp3", "duration":3.11, "device_vendor":null, "device_name":null, "device_software":null, "latitude":null, "longitude":null }, "url":"http://s3.transloadit.com/b7deac9c96af6c745e914e25d0350baa/7a/2b09e822265ac2328789b40dcc02ae/bbc_one.flv" }, "video_encode_iphone":{ "name":"bbc_one.qt", "mime":"video/quicktime", "steps":["encode_iphone","export"], "ext":"qt", "size":218236, "meta":{ "width":480, "height":320, "video_fps":25, "video_bitrate":null, "video_format":"avc1", "video_codec":"ffh264", "audio_bitrate":"128k", "audio_codec":"faad", "duration":3.04, "device_vendor":null, "device_name":null, "device_software":null, "latitude":null, "longitude":null }, "url":"http://s3.transloadit.com/31/58bcc80d5345e52a42c9773125e8f0/bbc_one.qt" } } } Here is what I am trying to use video_links = { :flash_url => params[:transload][:results][:video_encode][:url], :mp4_url => params[:transload][:results][:video_encode_iphone][:url] } params[:video].merge(video_links)

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