Recent questions tagged Ruby

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ruby on rails - Counting and grouping at the same time

I have a Mail model with the following schema: t.string "mail" t.integer "country" t.boolean "validated" t. ... group and count in just one go 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 - Contact Form Mailer in Rails 4

I am trying to build a contact form in Rails 4, where the form takes a name, email, and ... config.action_mailer.raise_delivery_errors = true 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 - What's the difference between design patterns and design principles?

I'm new to Ruby on Rails, and I went through these articles. Design Patterns in Ruby: Observer, ... someone please explain the distinction? 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 - Watch/read a growing log file

I have a log file that is constantly growing. How can I watch and parse it via a Ruby script? The script ... line contains the string 'ERROR' 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 - How do I get the class of a BasicObject instance?

I have a script that iterates using ObjectSpace#each_object with no args. Then it prints how many instances exist for ... cause of my 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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604 views

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ruby on rails - How to assign a remote file to Carrierwave?

I have video model with the following definition: class Video require 'carrierwave/orm/activerecord' mount_uploader : ... this to Carrierwave? 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 - Custom form helpers

Is there a way that I can create a custom form helper so that instead of: special_field_tag :object, : ... like: form.special_field :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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690 views

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ruby - How to calculate the distance between two GPS coordinates without using Google Maps API?

I'm wondering if there's a way to calculate the distance of two GPS coordinates without relying on Google Maps ... reverse GEO on the addresses. 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 - Can Rails Migrations be used to convert data?

I'm trying to convert a column in my Rails app, for arguments sake let's pretend I'm trying to ... here even possible with migrations? 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 - How can I serve requests concurrently with Rails 4?

I'm trying to serve multiple requests concurrently in Rails 4, something I was able to do very easily with config ... difference even if I try) See Question&Answers more detail:os...

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

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594 views

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ruby on rails - Observers vs. Callbacks

i thought about using observers or callbacks. What and when you should use an observer? F.e. you could do ... ... What dou you recommened? 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 - Conditional attributes in Active Model Serializers

How do I render an attribute only if some condition is true? For example, I want to render User's token attribute on create action. See Question&Answers more detail:os...

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

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471 views

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ruby on rails - undefined method `environment' for nil:NilClass when importing Bootstrap

I've been trying to import Bootstrap into my rails app and I'm not quite sure what's going wrong. I've had it ... 1.1) uglifier (= 2.1.1) See Question&Answers more detail:os...

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

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674 views

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ruby - WARNING: Can't verify CSRF token authenticity in case of API development

I am right now developing web APIs with Ruby on Rails. When the Rails app receives POST request without any csrf ... you very much in advance. See Question&Answers more detail:os...

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

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371 views

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ruby on rails - How do I simulate a login with RSpec?

I have been playing with Rails for a couple of years now and have produced a couple of passable apps that are ... thank you for having a look. 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 - dependent => destroy on a "has_many through" association

Apparently dependent => destroy is ignored when also using the :through option. So I have this... class Comment ... when using :through? 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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434 views

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ruby - What’s the best way to handle exceptions from Net::HTTP?

What's the best way to rescue exceptions from Net::HTTP? Exceptions thrown are described in Ruby's socket ... in a parent HttpRequestException? 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 - Split string by multiple delimiters

I want to split a string by whitespaces, , and ' using a single ruby command. word.split will split by white ... to do all three at once? See Question&Answers more detail:os...

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

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556 views

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ruby on rails - Parsing string to add to URL-encoded URL

Given the string: "Hello there world" how can I create a URL-encoded string like this: "Hello%20there%20world" I ... build some code for that. See Question&Answers more detail:os...

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

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603 views

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ruby on rails - Bundler: You are trying to install in deployment mode after changing your Gemfile

I'm pretty new to bundler and capistrano, and I'm trying to use them together. When I try to deploy, I get the ... mingw32' # gem 'a' ... 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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444 views

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ruby - Rails Resque workers fail with PGError: server closed the connection unexpectedly

I have site running rails application and resque workers running in production mode, on Ubuntu 9.10, Rails ... pools? Or reasonable workaround? See Question&Answers more detail:os...

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

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702 views

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ruby - Monkey patching Devise (or any Rails gem)

I'm using the Devise authentication gem in my Rails project, and I want to change the keys it's ... ' for Devise::SessionsController:Class See Question&Answers more detail:os...

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

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386 views

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ruby - create_or_update method in rails

if ClassName.exists?(["id = ?", self.id]) object = ClassName.find_by_name(self.name) object.update_attributes!( : ... that I can do this with? See Question&Answers more detail:os...

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

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853 views

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ruby on rails - Unable to start the Phusion Passenger watchdog?

I have done a Phusion Passenger setup on Ubuntu 10.04, with Apache2. Whenever I restart the Apache ... directive, whichever is applicable. See Question&Answers more detail:os...

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

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673 views

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ruby on rails - Heroku: see params and sql activity in logs?

When i view my heroku logs on the server (with heroku logs --tail --app myapp) i see something like this: ... ...any ideas anyone? thanks, max See Question&Answers more detail:os...

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

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654 views

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ruby - Libxml2 missing mac os x 10.10

Running 'compile' for libxslt 1.1.28... OK Running 'install' for libxslt 1.1.28... OK Activating ... . You may need configuration options. See Question&Answers more detail:os...

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

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587 views

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ruby - Rails 4 Unpermitted Parameters for Array

I have an array field in my model and I'm attempting to update it. My strong parameter method is below def ... is permitted to do so? 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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751 views

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ruby on rails - redirect_to != return

I'm looking for some clarification regarding the behaviour of redirect_to. I have this code: if some_condition ... end redirect_to(path_two) See Question&Answers more detail:os...

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

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