Recent questions tagged ruby

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ruby - How to change all the keys of a hash by a new set of given keys

How do I change all the keys of a hash by a new set of given keys? Is there a way to do that elegantly? 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 - PG::ConnectionBad: fe_sendauth: no password supplied

When I attempt to run "rake test" on a local postgres database, it throws the above exception. Here is my ... What else am I missing 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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360 views

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ruby - Error: SASS installation for windows

am trying to install sass after installing ruby, but iam getting following error, please help me to fix this ... org/latest_specs.4.8.gz) 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 - PG::UndefinedTable: ERROR: missing FROM-clause entry for table when using joins and where

I have two models, Courier and Order. I have the following query below: active_couriers = Courier. ... I doing incorrectly 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 - What's the difference between GEM_HOME and GEM_PATH?

RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing ... GEM_HOME and GEM_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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ruby on rails - How can I check if a value is a number?

I want to simply check if a returned value from a form text field is a number i.e.: 12 , 12.5 or 12.75. ... if the value is pulled as a param? 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 - Geocoder, how to test locally when ip is 127.0.0.1?

I can't get geocoder to work correct as my local ip address is 127.0.0.1 so it can't located where I ... it will bring break more relevant data? 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 - FactoryGirl screws up rake db:migrate process

I am doing TDD/BDD in Ruby on Rails 3 with Rspec (2.11.0) and FactoryGirl (4.0.0). I have a ... the FactoryGirl stage in the db:migration 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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ruby on rails - Calling a method from another controller

If I've got a method in a different controller to the one I'm writing in, and I want to call that ... consider moving that method to a helper? 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 on rails - OS X Lion, Attempting Nokogiri install - libxml2 is missing

sudo gem install nokogiri Building native extensions. This could take a while... ERROR: Error installing nokogiri: ERROR: ... a clue how to fix. See Question&Answers more detail:os...

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

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426 views

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ruby on rails - ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead

Seems the last post for this problem was closed for one reason or another so I'll try my luck... I'm trying to ... ', '< 0.3' Any thoughts? 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 - Is it possible to output the SQL change scripts that 'rake db:migrate' produces?

Is it possible to output the SQL change scripts that 'rake db:migrate' produces? See Question&Answers more detail:os...

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

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465 views

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ruby on rails - database configuration does not specify adapter

I'm getting this error when I'm trying to connect to a mysql database. The problem is that the application works ... idea on what is going on? See Question&Answers more detail:os...

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

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354 views

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ruby on rails 4 - RoR nested attributes produces duplicates when edit

I'm trying to follow Ryan Bates RailsCast #196: Nested model form part 1. There're two apparent differences ... Any help is greatly 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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446 views

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ruby on rails - How do you add a custom http header?

I'm looking to add custom http headers to a Ruby on Rails app that is currently hosted on Heroku. 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 - How do I print out the contents of an object in Rails for easy debugging?

I think I'm trying to get the PHP equivalent of print_r() (print human-readable); at present the raw ... Relation:0x10355d1c0 What should I do? See Question&Answers more detail:os...

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

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547 views

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ruby - How to compare strings ignoring the case

I want apple and Apple comparison to be true. Currently "Apple" == "Apple" # returns TRUE "Apple" == "APPLE" # returns FALSE See Question&Answers more detail:os...

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

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453 views

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ruby - What's the difference between gets.chomp() vs. STDIN.gets.chomp()?

Are they the same, or are there subtle differences between the two commands? See Question&Answers more detail:os...

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

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444 views

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ruby - Can't start foreman in Heroku Tutorial using Python

I have been attempting to complete this tutorial, but have run into a problem with the foreman start line. I ... to my problem currently exists. See Question&Answers more detail:os...

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

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443 views

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ruby on rails - How to disable HTTP Strict Transport Security?

I had a Rails application with config.force_ssl = true, but now I dont want SSL encryption, but my app is still ... . How can I disable 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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336 views

1 answer

ruby - Batch insertion in rails 3

I want to do a batch insert of few thousand records into the database (POSTGRES in my case) from within my ... but I want a better approach. See Question&Answers more detail:os...

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

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409 views

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ruby - Rails 3 - no such file to load -- openssl

when running a Rails server, I get the following error: no such file to load -- openssl I try a solution ... cannot use make nor make 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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737 views

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ruby on rails - Devise logging out automatically after password change

In Devise, if I change user's password and after it gets updated in the db, the site immediately logs out the ... do i do that. please help. 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 - Get the value of an instance variable given its name

In general, how can I get a reference to an object whose name I have in a string? More specifically, I ... }" field_ref.from_s(param) end 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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556 views

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ruby on rails - problem implementing wicked pdf on heroku

I am using this guide for integrating wicked_pdf on heroku. But somehow it doesn't seem to work. I got the ... ? for #<Pathname:0x2b7112392480>) See Question&Answers more detail:os...

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

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512 views

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ruby on rails 3 - How do I create a Mailer Observer

I'd like to run some code whenever an email is sent on my app. As ActionMailer doesn't support ... however does not elaborate. 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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837 views

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ruby - Rails: Postgres permission denied to create database on rake db:create:all

I am trying to create postgres databases for development and tests. I'm using: OSX Yosemite Rails version ... PostgreSQL during development too. See Question&Answers more detail:os...

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

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319 views

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ruby on rails - Access CanCan's `can?` method from a model

You can get the current_user's permissions from a view or controller using can? in this fashion: <% if can? : ... : user.can?(:update, @article) See Question&Answers more detail:os...

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

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