Recent questions tagged ruby

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ruby on rails - Could not load 'active_record/connection_adapters/sqlite3_adapter'

I'm trying to install ROR on my notebook (Debian Wheezy 64 bit). On first I had this issue (enter link description here ... 4.0.0 sqlite 1.3.7 See Question&Answers more detail:os...

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

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404 views

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ruby - Chaining & to_proc on symbol

It's well known to Rubyist & will call to_proc on a symbol, so [:a, :b, :c].map(&:to_s) is equivalent to [ ... b, :c].map(&:to_s:upcase) 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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436 views

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ruby hash autovivification (facets)

Here is a clever trick to enable hash autovivification in ruby (taken from facets): # File lib/core/facets ... ? Especially with two parameters? See Question&Answers more detail:os...

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

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590 views

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ruby - Can I use RSpec to mock stdin/stdout to test console reads & writes?

My Ruby program reads lines from stdin and uses puts to print to stdout (the terminal). Can I use ... subject.read_in and subject.write_out? See Question&Answers more detail:os...

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

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631 views

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ruby on rails - ActiveRecord find all parents that have associated children

I don't know why I can't figure this out, I think it should be fairly simple. I have two models ( ... Supplier < AR belongs_to :supplier 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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674 views

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ruby on rails - How to fix the [unixODBC][Driver Manager]Data source name not found, and no default driver specified (ODBC::Error)

/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-sqlserver-adapter-3.2.12/lib/active_record/connection_adapters/ ... fix this one please? See Question&Answers more detail:os...

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

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690 views

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ruby on rails - Detect if application was started as HTTP server or not (rake task, rconsole etc)

I'm using EventMachine and Monetarily to start e TCP server along with my rails application. This is started from ... not desirable for my case. See Question&Answers more detail:os...

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

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483 views

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ruby on rails - Have to_json return a mongoid as a string

In my Rails API, I'd like a Mongo object to return as a JSON string with the Mongo UID as an "id" ... _id #%w(_id) super(options) 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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377 views

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ruby on rails - How to insert a string into a textfile

I have a configuration file to which I want to add a string, that looks e.g. like that: line1 line2 line3 ... line4 How can this be achieved? See Question&Answers more detail:os...

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

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323 views

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ruby - Deadlock in ThreadPool

I couldn't find a decent ThreadPool implementation for Ruby, so I wrote mine (based partly on code from here: ... << worker worker 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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519 views

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ruby - How to format irb command prompt

Previously I was using Ruby 1.8 and my irb command prompt used to look like this: Air ~: irb >> a = 1 => ... .2-p180 :001 from the command line? See Question&Answers more detail:os...

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

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373 views

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ruby - Calling Sinatra from within Sinatra

I have a Sinatra based REST service app and I would like to call one of the resources from within one of ... within Sinatra using their DSL. See Question&Answers more detail:os...

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

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844 views

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ruby on rails - Disable Sprockets asset caching in development

I'm using Rails 3.2.13 and the Rails Asset Pipeline. I want to use the Asset Pipeline so I can use SASS ... on demand but not cache the results? See Question&Answers more detail:os...

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

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533 views

1 answer

ruby - to_specs': Could not find chef (>= 0) amongst [] (Gem::LoadError)

I am trying to install chef and knife ec2 plugin on my laptop to set up the workstation. Initially I use ... ruby_noexec_wrapper:14:in `<main>' See Question&Answers more detail:os...

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

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590 views

1 answer

ruby on rails - How do you change the Active Storage Service url_expires_in timeout?

When Active Storage creates a signed variant URL, it sets a default timeout of 5.minutes. I really want to ... appreciated. 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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588 views

1 answer

ruby - How to run raw SQL queries with Sequel

I am not clear yet on the proper way to run raw SQL queries with Sequel. Currently I am trying this: DB.fetch ... ? if @zonename.name = "UK" See Question&Answers more detail:os...

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

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564 views

1 answer

ruby on rails - yield and provide() inside template

Could anyone give clear explanation on how provide() works inside the view ? I have read official documentation but ... block in this context? See Question&Answers more detail:os...

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

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611 views

1 answer

ruby - Override rails helpers with access to original

I want to use rails' familiar helpers, but with slightly altered functionality. The way I see it, I want to ... adds nothing to the question.) See Question&Answers more detail:os...

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

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533 views

1 answer

ruby on rails - Postgres permission denied on MAC OS X

I was following the ruby on rails tutorial to run with postgres but when I try the "rake db:create" I get the ... shows me no errors on path. See Question&Answers more detail:os...

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

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486 views

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ruby - Rails 3 install error: "invalid value for @cert_chain"

I'm trying to install Rails 3 on a new OS X Snow Leopard machine (with dev tools installed), and when I sudo gem ... 8.7 OS X 10.6.6 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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709 views

1 answer

ruby on rails - Webpacker can't find application

I'm creating a new rails application according to "Getting Started with Rails". The application starts normally in step ... /head> 11 <body> 12 See Question&Answers more detail:os...

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

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567 views

1 answer

ruby on rails 3 - What is the purpose of config.assets.precompile?

In Rails 3.1, you must whitelist files that you want included in asset precompilation. You must open up ... Anyone else share these feelings? See Question&Answers more detail:os...

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

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557 views

1 answer

ruby on rails - Require statement in application.css.scss

I want to use a lightbox gem such as fancybox or color box. Both gems ask to add this line in the ... "users"; *= require colorbox-rails See Question&Answers more detail:os...

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

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524 views

1 answer

ruby - How is each_with_object supposed to work?

I'm trying to figure out how each_with_object is supposed to be used. I have a sum example that doesn't work: > ( ... 6 ! Where is my mistake ? See Question&Answers more detail:os...

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

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436 views

1 answer

ruby - Putting the results of pp (or anything outputted to console) into a string

We know require 'pp' a=["value1", "value2", "value3"] pp a pretty prints the array as an output to ... return that pretty string from a method. See Question&Answers more detail:os...

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

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581 views

1 answer

ruby on rails - HTML code inside buttons with simple_form

I'm new to rails, and just found the simple_form gem. I installed it with bootstrap suport, but now I ... the button with simple_form 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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801 views

1 answer

ruby on rails - How to change DATABASE_URL for a heroku application

I wanted to use an external Database with my heroku application. But I'm unable to edit the configuration cariables ... is not a heroku command. See Question&Answers more detail:os...

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

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846 views

1 answer

ruby on rails 4 - "undefined method `env' for nil:NilClass" in 'setup_controller_for_warden' error when testing Devise using Rspec

I'm trying to create a spec for a sign out flow by using factorygirl to create a user and then use ... I miss some configuration? 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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