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  • Is there a way to create a step chart using the Google Charts API?

    - by Nathan
    I'd like to use the google charts API to create a step chart for my Rails application. Preferably using the annotated timeline Google has (since it has a nice wrapper plugin for rails): http://code.google.com/apis/visualization/documentation/gallery/annotatedtimeline.html However, there doesn't seem to be a way to create a step chart using the annotated timeline or any other chart in the Google API. I'm looking to make a plot like this: If there is no way to do this with the google API, is there an alternative graphing library that can handle such a task?

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  • vestal_versions and htmldiff question of reversion...

    - by holden
    I'm guessing there's probably an easier way to do what I'm doing so that the code is less unwieldy. I had trouble understanding how to use the revert_to method... i wanted something where i could call up two different versions at the same time, but this doesn't seem to be the way that vestal_versions works. This code works, but I'm wondering if I'm making something harder than it needs to be and I'd like to find out before I delve deeper. @article = Article.find(params[:id]) if params[:versions] v = params[:versions].split(',') @article.revert_to(v.first.to_i) @content1 = @article.content @article.revert_to(v.last.to_i) @content2 = @article.content end In case you're wondering, I'm using this in conjunction with HTMLDIFF to get the version changes. <div id="content"> <% if params[:versions] %> <%= Article.diff(@content1, @content2) %> <% else %> <%= @article.content %> <% end %> </div>

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  • Backslashes in gsub (escaping and backreferencing)

    - by polygenelubricants
    Consider the following snippet: puts 'hello'.gsub(/.+/, '\0 \\0 \\\0 \\\\0') This prints (as seen on ideone.com): hello hello \0 \0 This was very surprising, because I'd expect to see something like this instead: hello \0 \hello \\0 My argument is that \ is an escape character, so you write \\ to get a literal backslash, thus \\0 is a literal backslash \ followed by 0, etc. Obviously this is not how gsub is interpreting it, so can someone explain what's going on? And what do I have to do to get the replacement I want above?

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  • Associate new Authlogic Model to existing Models

    - by BriteLite
    Hello, While playing around with Rails (since I am a newbie) while reading Agile Rails book I came across an issue using the Gem Authlogic that I don't know how to address. I have a simple business Model. The tables store the following information: Name, Address, Latitude, and Longitude. The above approach has been working fine, because using the console I can enter the information and it shows up, where I need it to. My issue now is that I want to add authentication to it. As in assign those records in the table, to individual accounts. Since Authlogic is an authentication gem, can this be done? What I am trying to get to here is that, I enter a few records and leave it at that. Few days later, I want to assign those individual rows in the table to an authlogic model so the person to whom the record should belong can authenticate to it and make changes. Any code samples, blog posts to better help me understand would be great! Thank You.

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  • How would I detect horizontal-black lines using ImageMagick?

    - by Zando
    So I have what is essentially a spreadsheet in TIFF format. There is some uniformity to it...for example, all the column widths are the same. I want to de-limit this sheet by those known-column widths and basically create lots of little graphic files, one for each cell, and run OCR on them and store it into a database. The problem is that the horizontal lines are not all the same height, so I need to use some kind of graphics library command to check if every pixel across is the same color (i.e. black). And if so, then I know I've reached the height-delimiter for a cell. How would I go about doing that? (I'm using RMagick)

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  • code to ping websites works sometimes ...

    - by trustfundbaby
    I'm testing out a piece of code to ping a bunch of websites I own on a regular basis, to make sure they're up. I'm using rails and so far I have this hideous test action that I'm using to try it out (see below). The problem though, is that sometimes it works, and other times it won't ... sometimes it runs through the code just fine, other times, it seems to completely ignore the begin/rescue block ... a. I need help figuring out what the problem is b. And refactoring this to make it look respectable. Your help is much appreciated. require 'net/http' require 'uri' def ping @sites = NewsSource.all @sites.each do |site| if site.uri and !site.uri.empty? uri = URI.parse(site.uri) response = nil path = uri.path.blank? ? '/' : uri.path path = uri.query.blank? ? path : "#{path}?#{uri.query}" begin Net::HTTP.start(uri.host, uri.port) {|http| http.open_timeout = 30 http.read_timeout = 30 response = http.head(path) } if response.code.eql?('200') or response.code.eql?('301') or response.code.eql?('302') site.up = true else site.up = false end site.up_check_msg = response.message site.up_check_code = response.code rescue Errno::EBADF rescue Timeout::Error site.up = false site.up_check_msg = 'timeout' site.up_check_code = '408' end site.up_check_time = 0.seconds.ago site.save end end end

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  • Trouble sending html in email with Pony gem

    - by Gearóid
    Hi, I've found this gem to be a great and easy way to send mail but I can't seem to send any html in it. If I write the following: Pony.mail( :to => message[:to], :from => @account[:from], :subject => message[:subject], :content_type => 'text/html', :html_body => "<h1>hey there!</h1>", :via => :smtp, :smtp => { :host => MY_HOST, :port => PORT, :auth => AUTH, :user => MY_USER, :password => MY_PASSWORD, :tls => true } ) The code above send a mail but the message appears to be empty in gmail. Any help would be greatly appreciated on this. Thanks.

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  • Rails - CSV export: prompt for file download

    - by Pierre
    Hello, I want to give my users the ability to export a table to CSV. So in my controller, I've added on top of the file: respond_to :html, :js, :csv I'm also setting the headers if the requested format is csv: if params[:format] == 'csv' generate_csv_headers("negotiations-#{Time.now.strftime("%Y%m%d")}") end Code for generate_csv_headers(in application_controller) is: def generate_csv_headers(filename) headers.merge!({ 'Cache-Control' => 'must-revalidate, post-check=0, pre-check=0', 'Content-Type' => 'text/csv', 'Content-Disposition' => "attachment; filename=\"#{filename}\"", 'Content-Transfer-Encoding' => 'binary' }) end I've also created a view named index.csv.erb to generate my file: <%- headers = ["Id", "Name"] -%> <%= CSV.generate_line headers %> <%- @negotiations.each do |n| -%> <%- row = [ n.id, n.name ] -%> <%= CSV.generate_line row %> <%- end -%> I don't have any error, but it simply displays the content of the CSV file, while I'd expect a prompt from the browser to download the file. I've read a lot, but could not find anything that'd work. Do you have an idea? thanks, p.

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  • executing named_scoped only when there are present params

    - by Luca Romagnoli
    Hi have a model like this: class EventDate < ActiveRecord::Base belongs_to :event named_scope :named, lambda { | name | { :joins => { :event => :core}, :conditions => ["name like ?", "%#{ name }%"] }} named_scope :date_range, lambda { | start, length | { :conditions => ["day >= ? AND day <= ?", start, date + (length || 30) ] }} it works correctly if i launch name = "ba" start = Date.today EventDate.named(name).date_range(start , start + 2) But if the name or the start is nil i don't want execute the named_scope like name = nil EventDate.named(name).date_range(start , start + 2) Is possible to set a condition inner the named_scope ? thanks

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  • Associating Models with Polymorphic

    - by Josh Crowder
    I am trying to associate Contacts with Classes but as two different types. Current_classes and Interested_classes. I know I need to enable polymorphic but I am not sure as to where it needs to be enabled. This is what I have at the moment class CreateClasses < ActiveRecord::Migration def self.up create_table :classes do |t| t.string :class_type t.string :class_name t.string :date t.timestamps end end def self.down drop_table :classes end end class CreateContactsInterestedClassesJoin < ActiveRecord::Migration def self.up create_table 'contacts_interested_classes', :id => false do |t| t.column 'class_id', :integer t.column 'contact_id', :integer end end def self.down drop_table 'contacts_interested_classes' end end class CreateContactsCurrentClassesJoin < ActiveRecord::Migration def self.up create_table 'contacts_current_classes', :id => false do |t| t.column 'class_id', :integer t.column 'contact_id', :integer end end def self.down drop_table 'contacts_current_classes' end end And then inside of my Contacts Model I want to have something like this. class Contact < ActiveRecord::Base has_and_belongs_to_many :classes, :join_table => "contacts_interested_classes", :foreign_key => "class_id" :as => 'interested_classes' has_and_belongs_to_many :classes, :join_table => "contacts_current_classes", :foreign_key => "class_id" :as => 'current_classes' end What am I doing wrong?

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  • How to get Nokogiri to ignore HTML elements that doesn't exist

    - by user296507
    any idea how i can get the code below to produce this output? 1 - 2 - B i'm getting this error "undefined method `text' for nil:NilClass (NoMethodError)", because i think table 1 does not have the element 'td class=r2' in it. require 'rubygems' require 'nokogiri' require 'open-uri' doc = Nokogiri::HTML.parse(<<-eohtml) <table class="t1"> <tbody> <tr> <td class="r1">1</td> </tr> </tbody> </table> <table class="t2"> <tbody> <tr> <td class="r1">2</td> <td class="r2">B</td> </tr> </tbody> </table> eohtml doc.css('tbody > tr').each do |n| r1 = n.at_css(".r1").text r2 = n.at_css(".r2").text puts "#{r1} - #{r2}" end

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  • Multiple Rails versions for multiple projects

    - by mathee
    I'd like to use Rails 2.2.2 for one project and Rails 2.3.2 for another. Both are installed. What is rails _2.2.2_ --version supposed to do? I've read that it makes 2.2.2 the working version -- that is, the version that will be used from that point on. But when I check rails --version, I get Rails 2.3.2. So, I also want to know what rails --version tells me; is it just the latest version of Rails that I have or is it the version that will be used for rakes? I know about RVM. Is that the best way to use different versions of Rails on different projects?

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  • 'script/console test' with spork and rspec not loading the whole environment?

    - by TheDeeno
    I'm trying to load up console to interact with some of my rspec mocking helpers. I expected that running script/console test would load an env similar to when I run spec. However, this doesn't appear to be the case. It looks like spec_helper is never loaded. Or, if it is, it's not actually running through the logic because spork has polluted it a bit. In short, is there a quick and easy way to get an interactive rspec party going?

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  • ActiveMerchant Integration usage example?

    - by giorgian
    Where can I find a complete example of ActiveMerchant Integrations usage? I can see tons of examples of Gateways' usage, but couldn't see how an Integration should be used (e.g. what do you do in the return_url and cancel_return_url controller actions?)

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  • Rmagick Fails To Manipulate PNG

    - by Tyler DeWitt
    Following the Railscast episode on CarrierWave: I installed ImageMagick on Mountain Lion via homebrew, exported the following path: export PKG_CONFIG_PATH="/opt/local/lib/pkgconfig:$PKG_CONFIG_PATH" Symlinked the following: ln -s /usr/local/include/ImageMagick/wand /usr/local/include/wand ln -s /usr/local/include/ImageMagick/magick /usr/local/include/magick And installed rmagick via bundler. In my uploader I have the following: include CarrierWave::RMagick version :thumb do process :resize_to_limit => [85, 85] end Which creates thumbnails just fine, but not for png files. I've tried a handful of png images and it always fails with this error: Failed to manipulate with rmagick, maybe it is not an image? Original Error: no decode delegate for this image format `<path>/public/uploads/tmp/20121022-2133-9885-3333/thumb_cat_vs_internet.png' @ error/constitute.c/ReadImage/544 jpeg images work just fine. EDIT identify -list format | grep -i png returns nothing, indicating the png decode delegate is probably missing. Now what?

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  • ActionView::MissingTemplate after Rails 3.1 upgrade

    - by jonallard
    After upgrading to Rails 3.1.0 and following David Rice's instructions, all of my controllers strangely can't find their views anymore. # rails s # Started GET "/units" for 127.0.0.1 at 2011-09-04 07:52:23 -0400 Unit Load (0.1ms) SELECT "units".* FROM "units" ActionView::MissingTemplate (Missing template units/index, application/index with {:handlers=>[:erb, :builder], :formats=>[:html], :locale=>[:en, :en]}. Searched in: ): app/controllers/units_controller.rb:9:in `index' units_controller.rb: # GET /units # GET /units.xml def index @units = Unit.all respond_to do |format| format.html # index.html.erb format.xml { render :xml => @units } end end Of course, the view is there (/app/views/units/index.html.erb; it was working before the upgrade). I feel this is a stupid error, what am I missing here?

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  • add method to reflection-object and named-scopes

    - by toy
    I Like to add a method to my has_many relation in the way that it is applyed on the relation object. I got an Order wich :has_many line_items I like to write things like order.line_items.calculate_total # returns the sum of line_items this I could do with: :has_many line_items do def calculate_total ... end end but this would not be applyed to named_scopes like payalbes_only: order.line_items.payables_only.calculate_total here calculate total would receive all line_items of order and not the scoped ones from payables_only-scope. My log tells me that the paybles_only scope is even not applied to the sql.

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  • Sinatra Title Slugs

    - by Ethan Turkeltaub
    I'm trying to create a slug helper in Sinatra. Here's the code (as seen here): helpers do def sluggify(title) accents = { ['á','à','â','ä','ã'] => 'a', ['Ã','Ä','Â','À'] => 'A', ['é','è','ê','ë'] => 'e', ['Ë','É','È','Ê'] => 'E', ['í','ì','î','ï'] => 'i', ['Î','Ì'] => 'I', ['ó','ò','ô','ö','õ'] => 'o', ['Õ','Ö','Ô','Ò','Ó'] => 'O', ['ú','ù','û','ü'] => 'u', ['Ú','Û','Ù','Ü'] => 'U', ['ç'] => 'c', ['Ç'] => 'C', ['ñ'] => 'n', ['Ñ'] => 'N' } accents.each do |ac,rep| ac.each do |s| title = title.gsub(s, rep) end end title = title.gsub(/[^a-zA-Z0-9 ]/,"") title = title.gsub(/[ ]+/," ") title = title.gsub(/ /,"-") title = title.downcase end end I keep getting this error: private method `gsub' called for nil:NilClass What exactly is going wrong?

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  • Rails - building an absolute url in a model's virtual attribute without url helper

    - by Nick
    I have a model that has paperclip attachments. The model might be used in multiple rails apps I need to return a full (non-relative) url to the attachment as part of a JSON API being consumed elsewhere. I'd like to abstract the paperclip aspect and have a simple virtual attribute like this: def thumbnail_url self.photo.url(:thumb) end This however only gives me the relative path. Since it's in the model I can't use the URL helper methods, right? What would be a good approach to prepending the application root url since I don't have helper support? I would like to avoid hardcoding something or adding code to the controller method that assembles my JSON. Thank you

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