Recent questions tagged Ruby

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ruby on rails - How to have the scaffold to generate another partial view template file

I'm trying to customize my scaffold generator, and I would like to have a new partial for the view in the ... should be valid even without 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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719 views

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ruby - Rails custom validation based on a regex?

I have the following regex that I use in my routes.rb for /type-in-something-here # A-Z, a-z, 0-9, _ ... to save. Any ideas what's wrong? 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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997 views

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ruby on rails - How to make changes to strong parameters (change to lowercase)

So I am familiarising myself with both rails and of course rails 4. So this is what I have at the bottom ... I get undefined method 'downcase' See Question&Answers more detail:os...

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

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941 views

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ruby - How do I use functions like CONCAT(), etc. in ARel?

Is there a way to have ARel write (sanitized, possibly aliased, etc.) column names into CONCAT() and ... concat_id FROM `countries`" 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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770 views

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ruby - TCP Socket communication between processes on Heroku worker dyno

I'd like to know how to communicate between processes on a Heroku worker dyno. We want a Resque worker to ... avoid our own fork if possible. See Question&Answers more detail:os...

asked Oct 24, 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 - Align checkboxes for f.collection_check_boxes with Simple_Form

I am using RoR and I am using the Simple_Form gem for my forms. I have an object relation whereby a User can ... inline; vertical-align: -5px; } See Question&Answers more detail:os...

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

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912 views

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ruby - What does ["string"].pack('H*') mean?

I need to translate some Ruby code to JavaScript and came across the following function: def sha1_hex(h) Digest ... it translate to JavaScript? See Question&Answers more detail:os...

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

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606 views

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ruby - Cannot run Jekyll new command

I tried to use Jekyll new command, but it didn't work and came out following errors. $ jekyll new myblog / ... before I installed 2.1.1p76. See Question&Answers more detail:os...

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

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734 views

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ruby on rails 3 - Failing to test Devise with Capybara

I'm building a Rails 3 app using Devise, with Capybara for UI testing. The following test is failing: class ... me in the right direction here? See Question&Answers more detail:os...

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

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712 views

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ruby on rails - Nested resource route helper not working

I have a nested route like so: resources :apps do resources :issues end the helper for seeing all issues related ... the helper for this url? See Question&Answers more detail:os...

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

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751 views

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ruby - Installing RMagick gem -- Can't find MagickWand.h

I am installing the rmagick gem on OSX 10.6.8, using gem install rmagick, and I am getting the following ... that my paths were refreshed. See Question&Answers more detail:os...

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

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576 views

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ruby - What is the best way to read files in an EventMachine-based app?

In order not to block the reactor I would like to read files asynchronously, but I've found no obvious ... within a EventMachine reactor loop? 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

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ruby - Rails: Methods shared by multiple controllers

I have two controllers, i.e 1) carts_controller 2) orders_controller class CartsController < ApplicationController helper_method ... 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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625 views

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ruby on rails - belongs_to and has_many to the same model

I am wondering whether there is a way to do this with rails or not. Basically I have a user model and an event ... a way for me to do 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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1.0k views

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ruby on rails - How to render erb template to string inside action?

I need a string of html (something like "<html><body>Hello World</body></html>") for faxing purpose. I ... return". How to solve this problem? See Question&Answers more detail:os...

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

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905 views

1 answer

ruby on rails - How do I store an instance variable across multiple actions in a controller?

Say I want to store some variable in my controller. I want to initialize it in one action, increment it in ... way to go about solving 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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786 views

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ruby - Slicing params hash for specific values

Summary Given a Hash, what is the most efficient way to create a subset Hash based on a list of keys to use? h1 = ... .send(m,*keys) } } 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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1.6k views

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ruby on rails - Devise, OmniAuth & Facebook: "Not found. Authentication passthru."

Trying to follow along with https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview and I'm stumped. I've got ... just gives me a 404. See Question&Answers more detail:os...

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

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656 views

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ruby - How do I find gems that depend on a given gem?

Is it possible to search for all gems that rely on a certain rubygem? For example, I'd like to ask for ... gems handle the issue mentioned here. See Question&Answers more detail:os...

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

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774 views

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ruby - Problem using OpenStruct with ERB

EDIT: forgot to include my environment info... Win7x64, RubyInstaller Ruby v1.9.1-p378 EDIT 2: just updated to v1.9 ... help me get it to work? See Question&Answers more detail:os...

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

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684 views

1 answer

ruby on rails - Error installing sqlite3 gem via bundler

I'm trying to get the sqlite3-ruby gem (version 1.3.4) installed on my account (CentOS on shared hosting, so I ... .o] Error 1 Any other 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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649 views

1 answer

ruby on rails - undefined method `name' for "actionmailer":String

I've an old version of Rails project which was built using BrowserCMS in the config/environment file RAILS_GEM_VERSION ... :19 any help 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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734 views

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ruby - Rake before task hook

Is there a straight forward way to modify a Rake task to run some bit of code before running the ... ].enhance(['i_run_afterwards_ha_ha']) See Question&Answers more detail:os...

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

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652 views

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ruby - How to parse a URL and extract the required substring

Say I have a string like this: "http://something.example.com/directory/" What I want to do is to parse ... is the "something", nothing else. 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

1 answer

ruby on rails - error in your Gemfile, and Bundler cannot continue

I just setup my mac for development and used this exact gemfile previously and it worked fine. I am not sure what I am ... 'pg', '0.12.2' 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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860 views

1 answer

ruby - Rails: How to use "_blank" or "_new" in Rails

In HTML, if I wanted a link to open in a new window, I'd adopt target="_blank" like this: <a href="http:// ... ), 'http://www.website.com/' %> See Question&Answers more detail:os...

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

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822 views

1 answer

ruby - RMagick - how do I find out the pixel dimension of an image

This may be a stupid question, but how does one find the image width and height in pixels? image.x_resolution and ... return 0 for some reason. See Question&Answers more detail:os...

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

0 votes

862 views

1 answer

ruby - Set vs Array , difference

What is the difference between Set and Array in Ruby except for the fact that sets keep unique elements while ... can keep duplicate elements? See Question&Answers more detail:os...

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

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