New answers tagged ruby-on-rails
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How to test Controller with sign in user on Rails 8 authentication
setup do
@user = users(:one)
sign_in_as(@user)
end
Working for me in new 8.1 rails project
- 253
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How to embed an iframe with ActionText/Trix on Ruby on Rails?
An alternative is to re-render the Trix content after saving. I built a simple package to solve this problem that can properly render YouTube videos, Tweets, code blocks, and images from Trix, here's ...
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Best practices
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How should I structure NestJS services when one endpoint needs to update multiple entities (e.g., InvestorProfile and TaxProfile)?
checkout the CQRS pacakage from NestJS, inside check Sagas/Event handlers. If you want to decouple your system Event Driven Architechture is the way
- 6,553
0
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i18n Pluralization
Using Ruby on Rails
You have #{n} #{'kid'.pluralize(n)}
See pluralize doc for options & alternatives:
https://api.rubyonrails.org/classes/ActionView/Helpers/TextHelper.html#method-i-pluralize
- 3,458
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Assertions for travel_to with attribute-based timezone
Referring to the documentation, the problem can be ascertained through toggling of configuration and adjusting the test.
puts Time.current
travel_to Time.zone.local(2025, 8, 8, 9, 59, 58)
puts ...
- 6,355
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How to handle ActiveRecord::RecordNotUnique error
This is a bit old but here's the difference in my testing with Rails 8:
If you create an ActiveRecord validation on your model (for example: validates_uniqueness_of :field_name) then you'll get ...
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How to package ruby on rails app into an executable
Tebako seems like the most promising option currently working on finding the way to package a rails app into an offline app. This article seems to show that it is very much possible using tebako and ...
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Can't connect to MongoDB Atlas (free tier)
Adding
&authSource=admin
to the connection URI did the trick. Thx to a friend!
- 78
-1
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Can't connect to MongoDB Atlas (free tier)
If you can use the same URI from a different client, the problem would appear to lie in the Ruby on Rails client side. It appears the SCRAM-SHA-1 authentication mechanism failed. Is it possible this ...
- 182
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How can I get the utc offset in Rails?
If you want the offset as a number you need to divide by a float ( 3600.0 or 1.hour.to_f ) otherwise offset that are not on the hour will be incorrect (e.g. Asia/Rangoon has an offset of UTC+06:30)
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ActiveAdmin complaining about ransackable_atttributes
I believe you're probably migrating from MetaSearch gem (Ransack predecessor).
_starts_with is not a predicate available in Ransack. On Ransack, it's just start (see it on the official docs).
...
- 560
0
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How to disable Rails test parallelization *just* for system tests?
Following this suggestion from the ruby forums I was able to do this by simply prepending this line in my test/application_system_test_case.rb before requiring test_helper.rb:
ENV["...
- 1,058
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How can I send mail with rails without a template?
I was really struggling with this in rails 8.
I wanted to send a multipart email that ALSO had attachments.
I tried every other answer here.
This was my final working code
def send_adhoc_email(message)...
Best practices
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How should I structure NestJS services when one endpoint needs to update multiple entities (e.g., InvestorProfile and TaxProfile)?
transactions are best solution for hear
https://docs.nestjs.com/techniques/database#typeorm-transactions
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How to sign in a user and create associated records with factories when testing
There seems to be some confusion there around factories usage. You use the factories just to mock a representation of the object and then you manipulate it according to your needs (such as using it ...
- 560
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error installing rails - alternate installation path possible
Often, a user might bump into permissions errors when trying to install gems on the same Ruby version that came installed on your OS. That version is usually "protected", it's meant to be ...
- 560
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Can you create a database backed rails model without a table?
Diogo is correct, views do work in Rails, for a long time already. But views seem overkill to me in this case.
The proper thing to use in SQL would be a TYPE. A TYPE is an empty carrier for a table ...
- 118
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An error occurred while installing mysql2 (0.5.4), and Bundler cannot continue - in rails project
For me, the error was "An error occurred while installing mysql2 (0.5.4), and Bundler cannot continue"
I just had to run this command with explicit version that is the same as in my Gemfile:
...
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Best practices
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How should I structure NestJS services when one endpoint needs to update multiple entities (e.g., InvestorProfile and TaxProfile)?
i believe you should use transaction in your exemple since you don't want to update one and the other throw an error
and to answer your question i think it's better if you put taxProfileService.update ...
- 70
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error installing rails - alternate installation path possible
Your OS user apparently has no write privilege on
/var/lib/gems/3.2.0/gems/websocket-driver-0.8.0/CHANGELOG.md
In order to fix it, you need to grant your OS user the necessary privileges over /var/...
- 80.4k
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Rails 7 - javascript importmap tags - custom for logged and nologged users
add in importmap.rb
pin "jquery", to: 'admin/jquery.js', preload: ['admin']
pin "dashboard", to: 'admin/dashboard.js', preload: ['admin']
pin "select2", to: "js/...
- 106
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Problem with migrated rails 8 sprockets/importmap sprockets errors on app/javascript files
I fixed it by just upgrading to use propshaft instead of sprockets, which was next on my list anyway.
- 139
0
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Test Data Generator CSV - Similar to Mockaroo
I still use Mockaroo sometimes, though Fakerbox has become my first choice because it’s straightforward and covers most formats I need during testing.
- 1
0
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Rails 8 importmap and chart.js
importmap-rails v2 is forever broken. Chart.js has a relative import which only works relative to cdn and it is not downloaded by bin/importmap:
import {...} from "../_/MwoWUuIu.js"
Using a ...
- 31.3k
0
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Turbo Rails (8x) with `link_to` raises "Can't verify CSRF token authenticity"
link_to does not support the params option.
You will notice that in your logs there are no parameters passed when using link_to which is why this is failing.
The reason this works for button_to is ...
- 30.5k
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Accepted
Can't get rails to match a nested controller to its layout
From the docs:
For instance, if you have PostsController and a template named app/views/layouts/posts.html.erb, that template will be used for all actions in PostsController and controllers ...
- 16.2k
0
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Querying for date range in rails
Couple modern answers. You can do:
Post.where created_at: 1.day.ago..Time.now # in the last day
Post.where created_at: ..2.day.ago # more than 2 days ago
Post.where created_at: 2.day.ago.. # in ...
- 2,199
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My rake task is not showing up in rake -T
I had a similar situation to Yathi's, where the issue was that I wasn't using a standard Rakefile.
As they mention, the default Rakefile will load tasks from lib/tasks, thanks to the lie Rails....
- 6,710
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Accepted
Rails logs show `DEBUGGER: Debugger can attach via UNIX domain socket` but VS Code rdbg says "Can not find attachable Ruby process."
It turned out to be caused by having an old version of the ruby/debug gem.
In the working app, ruby/debug was 1.9.2 (I looked in Gemfile.lock) and in the non-working site, it was 1.8.0.
When I ...
- 6,710
0
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Rails—get a random record from db?
Consider Disabling ActiveRecord Caching
It can sometimes be important to disable Rails caching, such as if you plan to run the same query multiple times within the same HTTP request:
random_user = ...
- 6,410
Best practices
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copying and deleting a collection of records from one postgresql table to a second table
On top of the pure SQL answer, I'd like to address your questions:
• whether this approach is sound, and;
Whenever I have doubts like this, there's only one answer that works for me: tests.
Set up ...
- 6,791
Best practices
4
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copying and deleting a collection of records from one postgresql table to a second table
This would be very simple and safe using native SQL with a data modifying CTE.
Here is an illustration:
with t as (
delete from itemised_origin_rows
where <your condition(s) here>
...
- 13.2k
0
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Devise - remember me not working? LocalHost Issue?
By default, in the development environment, a new secret_key_base is generated each time the application restarts. This causes previously signed cookies to become invalid and unusable. Since Devise ...
- 3,458
0
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"rails test" command prints out a very long output
This is fixed by https://github.com/rails/rails/pull/45882
The implementation of inspect simply loops over all instance variables, but interestingly it doesn't call the instance_variables method to ...
- 6,225
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Where is Ruby's ERB format "officially" defined?
This is a great question. There are several ways to answer it, and I'll try and pull them all together into this one answer.
The first answer is to say, like the original answer here, that "ERB&...
- 6,710
0
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Create a select tag with some options grouped and others not grouped
There's a simpler way to achieve this, by combining options_for_select and grouped_options_for_select together:
options_for_select(["Income"]) + grouped_options_for_select([["Auto",...
- 370
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Rails App crashes when https request is made after upgrading to macos Tahoe 2025
I can see your puma version 6.4.3 which had some issue with openssl version determine logic, if you upgrade to 6.5 might solve your problem, because they fixed some openssl version determining issue.
...
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3
votes
Accepted
Rails8/Devise custom action found in routes, but 404 when called
You have to give the exact mapping name to devise_scope, regardless of any namespace nesting:
namespace :api do
namespace :v1 do
devise_for :users
devise_scope :api_v1_user do
# ...
...
- 31.3k
1
vote
Accepted
How to make jsbundling-rails and yarn work together?
Well, data from your question
Yarn is the part of NVM-based Node:
which yarn
/home/[user]/.nvm/versions/node/v25.0.0/bin/yarn
When you try to call this command through SSH
ssh user@server_ip which ...
- 16.2k
0
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How to check for a JSON response using RSpec?
Hell-o!
You can use the json_expressions gem to use json in the simplest way:
let(:expected_result) { { a: 0, b: 2 } }
...
it 'expect response to match expected' do
expect(subject).to ...
- 3,047
1
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How can I use Rails internal error reporting to swallow the error in production but not in test or development
My workaround has been to create a custom `ErrorSubscriber` :
# config/initializers/error_subscriber.rb
class ErrorSubscriber
def report(error, handled:, severity:, context:, source: nil)
args = ...
- 39.5k
1
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Rails 7 / GraphQL-Ruby: ActionCable subscription always 403 Forbidden when connecting with JWT
Answer
In my case the WebSocket 403 Forbidden was not caused by ActionCable itself — the connection was being rejected by Rack::Attack.
Rails logged only:
Started GET "/cable?token=[FILTERED]&...
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