Recent questions tagged Ruby

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ruby - How to get a particular line from a file

Is it possible to extract a particular line from a file knowing its line number? For example, just get the contents ... from file "text.txt"? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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604 views

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ruby on rails - Shorten long numbers to include K/M/B/T

I've checked out Rails number_to_human but it's not exactly what i want. I'd like to shorten long numbers ... a good helper method for this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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530 views

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ruby on rails - Why do I get an error installing the JSON gem in Ubuntu?

Using Ubuntu, when I run "bundle install" to set up my Rails environment, it throws an error during the JSON gem ... 't it install the JSON gem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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674 views

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ruby on rails - Where do I put helper methods for ActionMailer views?

I have a method that takes an array of strings and joins them so they do something like this: >> my_arr => [" ... it there. Where should it go? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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510 views

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ruby - Difference between Integer(value) and value.to_i

Given a string object like this: twohundred = "200" What is the difference between doing: Integer(twohundred) #=> ... one among the other one? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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391 views

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ruby on rails - Index the results of a method in ElasticSearch (Tire + ActiveRecord)

I'm indexing a data set for elasticsearch using Tire and ActiveRecord. I have an Artist model, which has_many : ... . Thanks for your ideas! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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627 views

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ruby on rails - Sass with erb won't compile

In Rails, file file.css.sass.erb: .class-name width: <%= "10px" %> Is throwing the error: Invalid ... issue on SASS files remained untouched. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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613 views

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ruby - How to generate links with trailing slash in Rails 3?

I'm porting the existing website from PHP to Ruby on Rails 3 and I have to keep the urls unchanged. I have the ... of the url. Is it possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

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ruby on rails 3.1 - How do I associate a CoffeeScript file with a view?

Just installed rails 3.1 rc1 and am trying to grok the best way to manage javascript with the new asset ... with Rails 3.1 and Coffeescript See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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ruby on rails - How to use deactivate Webrick's SSL

Last week I tried to debug with SSL activated in webbrick, but I forget how to restore the settings to default(without ... ???98?5EDf32?A/??'. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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749 views

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ruby on rails - Skip email validation for omniauth-twitter on devise 2.0

I'm using devise 2.0 and gem omniauth-twitter The problem is that twitter does not send an email in response, ... fix this problem? Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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411 views

1 answer

ruby - Why doesn't "rails s" work from the app directory?

I'm in my app folder, but the command rails s is not working. I read through quite a few posts on Stack Overflow, and ... gem 'pg', '0.12.2' end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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519 views

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ruby on rails - expected true to respond to true?

I upgraded my rspec-rails to 3.0.1 and now I'm seeing this error on all of my tests Failure/Error: ... the solution nor what I'm missing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

1 answer

ruby - How to write Rake task to import data to Rails app?

Goal: Using a CRON task (or other scheduled event) to update database with nightly export of data from an ... will be implemented on EngineYard See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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ruby on rails - ActiveRecord::ReadOnlyRecord when using ActiveAdmin and Friendly_id

I started using ActiveAdmin recently in a project and almost everything works great but I'm having a problem when using ... -- HABTM --> Spaces? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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697 views

1 answer

ruby on rails - How to avoid adding the default Locale in generated URLs?

If you follow the I18N Rails Guide, all generated links contain the locale parameter (localhost/en/about, localhost/ ... :to => 'search#index' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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466 views

1 answer

ruby - How do I easily parse a URL with parameters in a Rails test?

I have a some code that embeds a return_to URL into a redirect (like OpenID) that I want to test: def ... can't find it. Thanks :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

1 answer

ruby on rails - How to add to a serialized array

I have an existing user which has a serialized field and I want to be able to add recent messages to the array / ... on where I'm going wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

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ruby - Add nullable foreign key in Rails

Referencing to Rails 4.2 add_foreign_key support: # add a foreign key to `articles.author_id` referencing `authors. ... can be sometimes null? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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492 views

1 answer

ruby on rails - Capistrano + Git : repository local to production server

I am trying to do 'deploy:cold' for my app. The git repo is local to my deployment server (i.e ... Connection refused Any ideas are appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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629 views

1 answer

ruby on rails - Nested resources in namespace form_for

Problem The form_for helper incorrectly determines the path to my nested resource inside of a namespace. The models ... in _form.html.haml See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

442 views

1 answer

ruby - Using implicit `subject` with `expect` in RSpec-2.11

With the new expect syntax in rspec-2.11, how is it possible to use the implicit subject? Is there a better ... `subject` be implicit? end end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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972 views

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ruby on rails - Validation failed Class must exist

I have been (hours) trouble with associations in Rails. I found a lot of similar problems, but I couldn't ... failed City must exist". Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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464 views

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ruby - OS X Mountain Lion: gcc-4.2 No such file or directory

Tried to install a gem on Mountain Lion and make couldn't find gcc-4.2: kamil$ gem install posix-spawn -v '0.3. ... *** [posix-spawn.o] Error 1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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423 views

1 answer

ruby on rails 3 - Capybara tests with :js=>true... Routing Error: No route matches [GET] "/assets"

I'm getting a similar error in a number of tests when I add ":js => true" to them. eg: An error ... server.rb:191:in `block in start_thread' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

389 views

1 answer

ruby - Are the Date, Time, and DateTime classes necessary?

What is the purpose of having Date and Time classes when there is a DateTime class that can handle both? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

506 views

1 answer

ruby - How do I extract a sub-hash from a hash?

I have a hash: h1 = {:a => :A, :b => :B, :c => :C, :d => :D} What is the best way to extract a sub-hash like ... } h1 #=> {:a => :A, :c => :C} See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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386 views

1 answer

ruby - Rails - The system cannot find the path specified

I have installed Rails and Ruby on Windows with railsinstaller. The problem is, when I run the rails command, it ... but rails -v= dont work. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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