Recent questions tagged ruby

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ruby - Regex to split BBCode into pieces

I have this: str = "some html code [img]......[/img] some html code [img]......[/img]" and I want to get this: ... .[/img]","[img]......[/img]"] See Question&Answers more detail:os...

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

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433 views

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ruby on rails - Heroku deployment failed because of sqlite3 gem error

I just started the ruby.railstutorial.org book by Michael Hartl and have been working through the first chapter ... be most 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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411 views

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ruby on rails - Using Process.spawn as a replacement for Process.fork

My development environment is a Windows machine running ruby 1.9.3p125 (RubyInstaller) and rails 3.2.8. ... go about making the transformation? 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 test for (ActiveRecord) object equality

In Ruby 1.9.2 on Rails 3.0.3, I'm attempting to test for object equality between two Friend (class ... assert those two objects are equal? 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 do you POST to a URL in Capybara?

Just switched from Cucumber+Webrat to Cucumber+Capybara and I am wondering how you can POST content to a URL in Capybara ... a POST to the URL? 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 - Why doesn't `config.time_zone` seem to do anything?

In application.rb, it says: Set Time.zone default to the specified zone and make Active Record auto-convert to this ... ) What's going on here? 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 - Find indices of elements that match a given condition

Given an array, how can I find all indices of elements those match a given condition? For example, if I have: ... a nicer way to achieve this? 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 - What is the replacement for ActionController::Base.relative_url_root?

I am porting a 2.x rails app to rails3; we'll call it foo-app. Foo-app is one section of a ... not reflecting the relative_url_root value I set? See Question&Answers more detail:os...

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

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393 views

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ruby - Sort an array according to the elements of another array

I have an array of ids a1 = [1, 2, 3, 4, 5] and I have another array of objects with ids in random ... me the most efficient way of sorting a2? See Question&Answers more detail:os...

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

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395 views

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ruby on rails - Regular expressions with validations in RoR 4

There is the following code: class Product < ActiveRecord::Base validates :title, :description, :image_url, presence: true ... How can I fix it? See Question&Answers more detail:os...

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

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493 views

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ruby - Rails: ActiveRecord query based on association value

I have 2 models. Report and Server that have a belongs_to and has_many relationship. I created an accessor ... :company_id has_many :reports 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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915 views

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ruby - How do I 'validate' on destroy in rails

On destruction of a restful resource, I want to guarantee a few things before I allow a destroy operation ... operation should be accepted? See Question&Answers more detail:os...

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

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513 views

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ruby on rails - How do I force RAILS_ENV in a rake task?

I have this little rake task: namespace :db do namespace :test do task :reset do ENV['RAILS_ENV'] = "test" ... I make this task work as expected See Question&Answers more detail:os...

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

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335 views

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ruby - Rails Model has_many with multiple foreign_keys

Relatively new to rails and trying to model a very simple family "tree" with a single Person model that has ... /better way altogether? 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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549 views

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ruby on rails - Overriding id on create in ActiveRecord

Is there any way of overriding a model's id value on create? Something like: Post.create(:id => 10, :title ... ideal, but obviously won't work. See Question&Answers more detail:os...

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

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647 views

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ruby on rails - Run rake task in controller

I'd like to run a rake task in my controller. Is there any way to do this? See Question&Answers more detail:os...

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

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379 views

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ruby on rails - Use YAML with variables

Are variables within YAML files possible? For example: theme: name: default css_path: compiled/themes/$theme.name ... What is the syntax? See Question&Answers more detail:os...

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

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479 views

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ruby - How to set default values in Rails?

I'm trying to find the best way to set default values for objects in Rails. The best I can think of is to set ... 's a better way to do it? See Question&Answers more detail:os...

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

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627 views

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ruby on rails - Storing arrays in database : JSON vs. serialized array

With ruby-on-rails, I want to store an array of 3 elements: the last 3 comments of a post. I know I ... serialized array or in a JSON object ? See Question&Answers more detail:os...

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

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428 views

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ruby on rails - How to use Active Support core extensions

I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7. When I try to use 1.week.ago I ... What gives? All of this is in IRB. See Question&Answers more detail:os...

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

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389 views

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ruby on rails - Redis + ActionController::Live threads not dying

Background: We've built a chat feature in to one of our existing Rails applications. We're using the new ... obtrusive and goofy as heck. See Question&Answers more detail:os...

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

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561 views

1 answer

ruby on rails - has_and_belongs_to_many vs has_many through

Please explain the difference between has_and_belongs_to_many and has_many through relationship. When and where to use which one? See Question&Answers more detail:os...

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

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467 views

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ruby - How to check if a URL is valid

How can I check if a string is a valid URL? For example: http://hello.it => yes http:||bra.ziz, => no ... if this is relative to a image file? See Question&Answers more detail:os...

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

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324 views

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ruby on rails - MySQL Install: ERROR: Failed to build gem native extension

I'm trying to get MySQL installed to the latest version due to some installation going wrong somewhere along the line ... mac-os-x-snow-leopard/ See Question&Answers more detail:os...

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

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537 views

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ruby on rails - Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:host]

I am trying to push my app on heroku. I am still in dev. I use devise with the confirmable module. When I try ... 1.8/timeout.rb:62:in `timeout' See Question&Answers more detail:os...

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

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776 views

1 answer

ruby on rails - curl : (1) Protocol https not supported or disabled in libcurl

I'm trying to install the Rails environments on Ubuntu 11.04. When I launch the command rvm install 1.9.2 ... libcurl How can this be resolved? See Question&Answers more detail:os...

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

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565 views

1 answer

ruby - How do I run a rake task from Capistrano?

I already have a deploy.rb that can deploy my app on my production server. My app contains a custom rake ... will remotely run that rake task. See Question&Answers more detail:os...

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

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625 views

1 answer

ruby on rails - find vs find_by vs where

I am new to rails. What I see that there are a lot of ways to find a record: find_by_<columnname>(< ... recommendation on which one to use? See Question&Answers more detail:os...

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

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