Recent questions tagged Ruby

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In config/routes.rb, I tried both: root :to => 'things#index', :as => 'things' and root :to => ' ... What is the :as option used for? See Question&Answers more detail:os...

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

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760 views

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ruby on rails - Does rake db:schema:dump recreate schema.rb from migrations or the database itself?

Does rake db:schema:dump recreate schema.rb from migrations or the database itself? See Question&Answers more detail:os...

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

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286 views

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ruby - Time difference in hours

I am trying to get the difference in hours for two different Time instances. I get these values from the DB as ... there a function 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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681 views

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ruby on rails - warning: constant ::Fixnum is deprecated When generating new model

I've tried to find some solution for this, but I really couldn't find anything related with the errors that ... may be causing these errors? 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 difference between `after_create` and `after_save` and when to use which?

Are after_create and after_save the same as per functionality? I want to do an operation with the email of ... use: after_create or after_save? See Question&Answers more detail:os...

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

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376 views

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ruby - Can't install mysql gem on OS X

I'm doing a sudo gem install mysql on OS X to install the mysql gem. This fails with the following ... homebrew if that makes a difference. See Question&Answers more detail:os...

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

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660 views

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ruby - Warning! PATH is not properly set up, usually this is caused by shell initialization files

Whenever I go to a folder with a .rvmrc file, there is a warning: Warning! PATH is not properly set up, ... warning is very annoying. 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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ruby - Best way to highlight current page in Rails 3? -- apply a css class to links conditionally

For the following code: <%= link_to "Some Page", some_path %> How do I apply a css class current using ... some other better way is available? See Question&Answers more detail:os...

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

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578 views

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ruby on rails - ActiveRecord - querying polymorphic associations

I am using polymorphic associations to track Comments in my project. All very straight forward stuff. The problem I ... ? Anything I am missing? 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 - Difference between $Bundle install and $Bundle update

Could you tell me, whats the difference between: $Bundle update and $Bundle install See Question&Answers more detail:os...

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

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398 views

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ruby - Adding a directory to the load path in Rails?

As of Rails 2.3, what's the right way to add a directory to the load path so that it hooks into ... method that I'm looking for. 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 - convert String to DateTime

I need to parse following String into a DateTime Object: 30/Nov/2009:16:29:30 +0100 Is there an easy way to ... problem with Ruby and not RoR. See Question&Answers more detail:os...

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

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1.2k views

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ruby on rails - How to set a default value for a datetime column to record creation time in a migration?

Consider the table creation script below: create_table :foo do |t| t.datetime :starts_at, :null => false ... start_at DATETIME DEFAULT 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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689 views

1 answer

ruby on rails - Relationship like Twitter followers/followed in ActiveRecord

I'm trying to represent a relationship between users in my application where a user can have many followers ... this using ActiveRecord? 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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583 views

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ruby - Rails 3. How to display two decimal places in edit form?

I have this edit form. But when I store something such as 1.5, I would like to display it as 1.50. How could I ... :cost, :class => 'cost' %> See Question&Answers more detail:os...

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

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451 views

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ruby - How to serve static files via Rack?

I am currently developing a Rack-based application and want to redirect all file requests (e.g. filename.filetype ... of-the-box solution exist? See Question&Answers more detail:os...

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

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381 views

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ruby on rails - Failing to access environment variables within `database.yml` file

I have the following developement section of my development.yml file: development: adapter: postgresql host: localhost ... file is being loaded? See Question&Answers more detail:os...

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

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527 views

1 answer

ruby - How to Implement a Friendship Model in Rails 3 for a Social Networking Application?

I'm currently working on a small social networking application and right now I'm trying to create a model that represents ... 2 | 1 | true | See Question&Answers more detail:os...

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

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410 views

1 answer

ruby - Rails 3. Creating a production database

How can I create a production database in Rails 3 and load a schema to it? I tried the following approaches... I. rake ... 3.0.0; Sqlite3 3.7.2. See Question&Answers more detail:os...

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

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531 views

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ruby on rails - Nested models and parent validation

I've got two models. - Parent has_many Children; - Parent accepts_nested_attributes_for Children; class Parent < ... makes system complicated. See Question&Answers more detail:os...

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

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981 views

1 answer

ruby - Bundler not working with rbenv, could not find [gem]

I've just made the switch from rvm to rbenv and I'm trying to use bundler for gem management. After running ... this as being a viable solution. See Question&Answers more detail:os...

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

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370 views

1 answer

ruby on rails - "rake assets:precompile" gives punc error

I'm trying to precompile my assets for production, but rails doesn't seem to be cooperating. $ bundle exec rake assets:precompile ... /gems/ruby-1.9.3-p194@global/gems/rake-0.9.2....

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

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546 views

1 answer

ruby - Dynamic Class Definition WITH a Class Name

How do I dynamically define a class in Ruby WITH a name? I know how to create a class dynamically without a name ... ) puts "dummy2: #{dummy2}" See Question&Answers more detail:os...

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

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371 views

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ruby on rails 3 - Global access to Rake DSL methods is deprecated

I am working through the Ruby on Rails 3 tutorial book and typed the following on the command line: rake db: ... How can I fix this problem? See Question&Answers more detail:os...

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

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600 views

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ruby - How to swap keys and values in a hash

How do I swap keys and values in a Hash? I have the following Hash: {:a=>:one, :b=>:two, :c=> ... rather tedious. Is there a shorter solution? See Question&Answers more detail:os...

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

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920 views

1 answer

ruby on rails - Cron job not working in Whenever gem

I have an application that contains a bunch of tasks, and every day I want to run a cron job that creates a ... time I want to test run 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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658 views

1 answer

ruby - rails respond_to format.js API

I am an experienced JAVA and C++ developer and I am trying to understand how rails works. I got this code ... the http://api.rubyonrails.org/ See Question&Answers more detail:os...

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

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329 views

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ruby - Rails: An elegant way to display a message when there are no elements in database

I realized that I'm writing a lot of code similar to this one: <% unless @messages.blank? %> <% @messages.each ... have no messages. <% 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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