Recent questions tagged ruby

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I have read the documentation at http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html, but don't understand when the around_* callbacks are ... after_*. Any help much appreciated. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - rails4 unknown encoding name - CP720

I got now this error When I want to run any gem commands such as gem install rubygems-update the error while executing gem ... (ArgumentError) unknown encoding name ... ????? Note : I'm using windows 7 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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367 views

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ruby on rails - Named routes _path vs _url

Rails provides named routes. Routes helper can be called using path or url eg from docs: # and provide these named routes root_url # => 'http://www ... with explanations when to use what would be great. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - How to use bundler behind a proxy?

I get the following output from the sudo bundle install command: Fetching source index for `http://rubygems.org/` Could not reach rubygems repository `http:// ... app (which I wouldn't mind doing...) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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355 views

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ruby on rails - ActionController::InvalidAuthenticityToken in RegistrationsController#create

Hi I am using Devise for my user authentication suddenly my new user registration was not working. this was error I am getting. ActionController::InvalidAuthenticityToken Rails ... </div> </div> <% end %> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby - Using Rails Migration on different database than standard "production" or "development"

I have a rails project running that defines the standard production:, :development and :test DB-connections in config/database.yml In addition I have ... use that other database definition? Thanks, Frank See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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265 views

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ruby - How does Array#sort work when a block is passed?

I am having a problem understanding how array.sort{ |x,y| block } works exactly, hence how to use it? An example from Ruby documentation: a = [ "d", "a", "e", "c", "b" ... } #=> ["e", "d", "c", "b", "a"] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - gem install permission problem

[email protected]:~> gem install hpricot ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /opt/ruby-enterprise-1. ... -enterprise-1.8.7/lib/ruby/gems/1.8 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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494 views

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ruby on rails - Using send_file to download a file from Amazon S3?

I have a download link in my app from which users should be able to download files which are stored on s3. These files will be publicly accessible on urls ... . How do I allow users to download S3 files? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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311 views

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ruby - Why are all Rails helpers available to all views, all the time? Is there a way to disable this?

Why can I access helper methods for one controller in the views for a different controller? Is there a way to disable this without hacking/patching Rails? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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357 views

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ruby - Convert Time from one time zone to another in Rails

My created_at timestamps are stored in UTC: >> Annotation.last.created_at => Sat, 29 Aug 2009 23:30:09 UTC +00:00 How do I ... savings)? Something like: Annotation.last.created_at.in_eastern_time See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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526 views

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ruby on rails - A migration to add unique constraint to a combination of columns

What I need is a migration to apply unique constraint to a combination of columns. i.e. for a people table, a combination of first_name, last_Name and Dob should be unique. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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291 views

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ruby - Installing Nokogiri on OSX 10.10 Yosemite

I recently upgrade to the 10.10 Yosemite beta, but I'm having trouble getting Nokogiri installed. I'm using RVM and Ruby 1.9.3. I've also followed ... updated in order to work in the 10.10 environment. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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504 views

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ruby - find_spec_for_exe': can't find gem bundler (>= 0.a) (Gem::GemNotFoundException)

I used sudo bundle install and that might be the cause of the issue? Now I have: gem -v 2.6.14 ruby -v ruby 2.3.5p376 (2017-09-14 revision ... Ruby, Gem or Bundle :) So I would appreciate some insights! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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362 views

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ruby - Why can't I install Rails on Lion using RVM?

I'm running into issues trying to install Rails on OS X Lion using RVM. So far, I have done the following: Installed Mac OS X Lion ... and https://github.com/carlhuda/bundler/issues/1058 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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260 views

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ruby on rails - How do I "activate" a different version of a particular gem?

I want to switch between rails 2.3.10 as the "active" gem for my OS, so that I can invoke it at the command line. Is it possible to do this ... any precise control over gems at the OS level until now) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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355 views

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ruby - How do you downgrade rubygems?

I have rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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260 views

1 answer

ruby on rails - Nokogiri 'Failed to build gem native extension' when I run bundle install

I'm running bundle install and I'm getting this error: Building nokogiri using system libraries. Gem::Ext::BuildError: ERROR: Failed to build gem ... when running bundle install it displays the error. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

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ruby - Unresolved specs during Gem::Specification.reset:

When launching Guard, I'm getting this output: $ guard WARN: Unresolved specs during Gem::Specification.reset: lumberjack (>= 1.0.2) ffi (>= 0.5.0) ... :style => :compressed, :extension => '.min.css' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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304 views

1 answer

ruby - Pass a variable into a partial, rails 3?

I have a loop like such: <% @posts.each do |post| %> <% render middle %> <% end %> Then in my middle partial, how do I access the current post? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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364 views

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ruby on rails - Can I get the name of the current controller in the view?

Is there a way to figure out what the current controller is from within the view? For an example of why I would want to know this: if several controllers ... m just wondering if there's a built-in way.) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

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ruby - Serving static files with Sinatra

I have one page website only using HTML, CSS and JavaScript. I want to deploy the app to Heroku, but I cannot find a way to do it. I am now trying ... should I write here to point to the `index.html` end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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361 views

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ruby on rails - How to check for a JSON response using RSpec?

I have the following code in my controller: format.json { render :json => { :flashcard => @flashcard, :lesson => @lesson, :success => true } ... received: 0 times Am I checking the response incorrectly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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499 views

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ruby on rails - belongs_to through associations

Given the following associations, I need to reference the Question that a Choice is attached through from the Choice model. I have been attempting to ... something simple. Any help would be appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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296 views

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ruby on rails 3 - Thin web server: `start_tcp_server': no acceptor (RuntimeError) after git branch checkout

A Rails 3.2.0 app, working fine with Thin web server, both locally and on Heroku cedar stack. After: $ git branch work $ git checkout work $ rails ... and installed it. Nothing seems to work. Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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332 views

1 answer

ruby - Rails 4: assets not loading in production

I'm trying to put my app into production and image and css asset paths aren't working. Here's what I'm currently doing: Image assets live in /app/ ... for javascripts (notice the /assets/****.js path). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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417 views

1 answer

ruby - Rails update_attributes without save?

Is there an alternative to update_attributes that does not save the record? So I could do something like: @car = Car.new(:make => 'GMC') #other processing ... but I want to update them all on one line. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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311 views

1 answer

ruby on rails 3 - rmagick gem install "Can't find Magick-config"

I get the error shown below when attempting to install the rmagick gem. I am on Snowleopard 10.6 using RVM, Ruby 1.9.2-head and Rails 3.05. ... of packages, and updates/uninstalls are a cinch as well! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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