Recent questions tagged Ruby

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ruby on rails - how to find the cause of ActiveRecord ROLLBACK

In the logs I'm seeing a ROLLBACK, but no exception is logged. Is there a way to find out what caused the ... "."phone_id" = 980190963 LIMIT 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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ruby - Active Record - Find records which were created_at before today

I want to get all records where the created_at field is less than today (a date). Is there anything like: ... .find_by_created_at(< 2.days.ago) See Question&Answers more detail:os...

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

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ruby on rails - How do I use nested attributes with the devise model

I have the same issue as Creating an additional related model with Devise (which has no answer). I have overridden ... list in the User model. See Question&Answers more detail:os...

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

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ruby - Install Rails 3 on OSX with RVM

Trying to install the new Rails 3 release on OSX 10.6. Have never touched Ruby or Rails on this machine since ... gem' from /usr/bin/rails:18 See Question&Answers more detail:os...

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

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538 views

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ruby on rails - Paperclip renaming files after they're saved

How do I rename a file after is has been uploaded and saved? My problem is that I need to parse information ... for the model has been saved. See Question&Answers more detail:os...

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

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643 views

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ruby on rails - Carrierwave files with Capistrano

I'm using rails 3.2 with asset and carrierwave for upload some images, they store in /public/uploads/photo/.... ... the best way to solve 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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ruby on rails - has_many :through : How do you access join table attributes?

I have the following models in Rails 4 with a simple has_many :through association: class Model < ActiveRecord:: ... join table data. 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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ruby - Best practice for Rails App to run a long task in the background?

I have a Rails application that unfortunately after a request to a controller, has to do some crunching that ... presented work on both? See Question&Answers more detail:os...

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

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ruby - Difference between @instance_variable and attr_accessor

I Just started learning ruby and I don't see the difference between an @instace_variable and an attribute declared using ... best way to use. See Question&Answers more detail:os...

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

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ruby - Routing nested resources in Rails 3

I have a pretty common case for nested routes, I feel like, that looks something like this (in some sort ... am I misusing this functionality? See Question&Answers more detail:os...

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

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625 views

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ruby - How do I access the Rack environment from within Rails?

I have a Rack application that looks like this: class Foo def initialize(app) @app = app end def call(env) env["hello ... == "world" ... 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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760 views

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ruby on rails - Capistrano SSH::AuthenticationFailed, not prompting for password

I've been using capistrano successfully for a while now and all of a sudden in every project I've lost the ability ... a loss here. Any 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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534 views

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ruby on rails - Create seed file from data already in the database

I'm using Rails 3.0.3 and have data for my "categories" table already in the database, but want to create ... rb format for me from this table? See Question&Answers more detail:os...

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

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406 views

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ruby - What are the paths that "require" looks up by default?

In Ruby, I have been told that when doing require "some_file" Ruby will look for the file in certain places. I ... it look for it by default? See Question&Answers more detail:os...

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

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813 views

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ruby on rails - ActiveRecord::StatementInvalid: PG InFailedSqlTransaction

I am trying to create an ActiveRecord Object.But I'm getting this error while creating it. (0.1ms) ... ideas folks regarding the issue. See Question&Answers more detail:os...

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

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376 views

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ruby - Default task for namespace in Rake

Given something like: namespace :my_tasks do task :foo do do_something end task :bar do do_something_else end task ... call rake my_tasks:all)? 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 - Running pod setup gives me "bad interpreter: No such file or directory" error

Recently I tried to do pod setup and I get this error: -bash: /usr/local/bin/pod: /usr/local/opt/ruby/bin/ ... have no idea what is going on. See Question&Answers more detail:os...

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

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347 views

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ruby - In Rails, display time between two dates in English

In a Rails project I want to find the difference between two dates and then display it in natural language. ... , weeks, days all together. See Question&Answers more detail:os...

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

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514 views

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ruby on rails - How to build a rubygems mirror server?

My workplace has banned us from internet access so we can't connect to rubygems.org to install gems remotely. ... gems from that mirror server? See Question&Answers more detail:os...

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

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534 views

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ruby - Rails 4 turbolinks with Google Analytics

I'm wondering what is the best way to implement Google Analytics tracking code along with the turbo linking in Rails ... not sure what it does. See Question&Answers more detail:os...

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

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560 views

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ruby on rails - Heroku Config Secret Key Base Error

Just pushed my first app to Heroku using Git and straight away got an Interanl Server Error. You must set ... line from my .gitignore file? See Question&Answers more detail:os...

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

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394 views

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ruby on rails - How does one add an attribute to a model?

In rails I generate a model with two strings and would like to add more. How would I go about doing 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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429 views

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ruby on rails - foreman only shows line with “started with pid #” and nothing else

When I run foreman I get the following: > foreman start 16:47:56 web.1 | started with pid 27122 Only if I stop ... ... How do I fix it? See Question&Answers more detail:os...

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

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433 views

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ruby - How to find the key of the largest value hash?

I have the following hash {"CA"=>2, "MI"=>1, "NY"=>1} How can I return the maximum key value pair using ruby? I would like it to return "CA" See Question&Answers more detail:os...

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

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534 views

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ruby - How to cancel scheduled job with delayed_job in Rails?

I am scheduling a job to run in say, 10 minutes. How to properly cancel this particular job without using ... specific model, instance, etc? See Question&Answers more detail:os...

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

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414 views

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ruby - What's the difference between to_a and to_ary?

What's the difference between to_a and to_ary? See Question&Answers more detail:os...

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

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380 views

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ruby on rails - Error installing nokogiri: Failed to build gem native extension & libiconv is missing (OSX)

I try to clone this repo and run bundle install. The bundle process failed and throw this error: ... Installing ... OSX 10.11.1 El Capitan. 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

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ruby - Rails optional argument

I have a class class Person attr_accessor :name,:age def initialize(name,age) @name = name @age = age end end ... in another variable { }). See Question&Answers more detail:os...

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

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