rails/rails

Ruby on Rails

Seif Eddine Slimene

@SeifESlimene

Can I send a screenshot here?

lukasbash

@lukasbash

Hi guys! I have a small question about update hooks. I have the use case that model A references several other models B, C and so on. It goes from 1:1, via 1:n up to n:m cardinality. Now, I would like to have a callback that I implement in model A which tells me that an attribute in e.g. model B changed. I would prefer to implement those hooks in the model A to keep everything related to this in one place where it is maintainable. Is there any option to do this with rails-native callbacks? I only found solutions for adding and removing entities inside a relation but not if one of the existing ones changes. May you help me out? Thank you!

vapalape

@vapalape

hi all, have problem to have access to my env variables from react (rails 6) any pointers documentations ?. Tried dotenv.js / with a require('dotenv').config() in my config/webpacker/development file. But does not work

Seif Eddine Slimene

@SeifESlimene

Hello, I'm using Rails / SPRockets,

For This File (application.js)

// = require libs/jquery-retina
// = require libs/jquery.popupoverlay
// = require libs/messg

// = require site_logic/application
// = require serviceworker-companion

// = require i18n
// = require i18n-rules
// = require lazysizes.min

// = require i18n

This file i18n.js doesn't exist in the current directory, however it's successfuly get into application.js

toptalent130

@toptalent130

Hi Everybody...

I'd like to learn about Ruby on Rails.

Paulo Daniel Carneiro

@PauloDanielCarneiro

Nice

Star

@topStar99

Hi @PauloDanielCarneiro

Nice to meet you..

Jonathan Hill

@qizwiz

how does one require a gem not in the Gemfile? and, I have no source access to the actual rails code I"m running...

benebrice

@benebrice

This message was deleted

Hi guys! I'm trying to understand the magic of the preview mailer.
Can anybody give me a hint?
How this

url_for(controller: "mailers", action: "preview", path: "#{preview.preview_name}/#{email}")

becomes this ?

/rails/mailers/mailer_model/mailer_method

Routes are registered somehow but I cannot find how/where.

Thank you in advance! 🙂

1 reply

Andrea Schiavini

@metalelf0

hi all, I'm struggling to find a solution for an ActionDispatch::Cookies::CookieOverflow error, raised when the app is trying to store too much data inside a session via the ransack memory gem.

this exception happens in ActionDispatch land, so it's not rescuable via rescue_from, and no, changing the session store to ActiveRecord just for this is not viable

I could write some mitigation logic, trying to guess a maximum size for ransack memory, but it would largely depend on what else is in the session and I'd prefer to write code to handle the exception (clearing session data and redirecting the user back to the root)

has anybody got any hint about what to do in such a situation?

Seif-apprentus

@Seif-apprentus

Hello, I'm struggling to integrate the lighthouse with Rails.

There is no index.html in static assets files.

almokhtar bekkour

@almokhtarbr

create one @Seif-apprentus

Amisha Shukla

@Amisha-100

What can be the possible reasons of data not adding up in the table other than validations?

Patrick Collins

@patrick99e99

Hi everyone... webpacker's v6 upgrade guide says: "Remove overlapping dependencies from your package.json and rails/webpacker's package.json." ... so I removed those, and I see webpacker's package.json specifies "@babel/plugin-proposal-class-properties": "^7.14.5", ... yet when I run webpack, now I get Error: Cannot find module '@babel/plugin-proposal-class-properties'

1 reply

Jordan Shackelford

@JordanShackelford

Does anyone know how to host subfolders on heroku?

Like I don't want to deploy the whole git repo, just a sub folder

Daniel Wilkowski

@Danon

@JordanShackelford You could make a read-only repository on github, that's a copy of a folder from your real repository, and host that on Heroku.

zero10xy

@zero10xy

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Didrik Birkemalm

@Doddlin

Can someone help me understand how I can include leaflet in a Rails7 app with importmap?

backward crazy mage puppy 36

@backward-crazy-mage-puppy-36

Hi, does anyone know how to enable yjit for rails application ?

Seif-apprentus

@Seif-apprentus

@backward-crazy-mage-puppy-36 I know

Zipho Mashologu

@zipho

Hi, I have a question here, I am trying to upgrade from 6.1.6 to 7.0.0.alpha1 & hitting a migration issue. NoMethodError: undefined method `key?' for nil:NilClass - is that familiar to someone here? Thanks in advance.

Lucas M.R.

@mrlucasrib

Hi, does anyone know if there is a package in python where I can create models similar to what Ruby on rails does with Rails Generator? How:
$ rails generate Controller mycontroller

kathyonu

@kathyonu

@zipho while researching something else, i kept seeing problems with early rails 7, and the answer was to install rails 7.0.3. the way to be safe about making such a jump would be to arrive here for the gemhttps://rubygems.org/gems/rails/versions/7.0.3

@zipho arrive here for the changelog from where you are to 7.0.3 .. see if your code is affected, if so, make needed change(s) : https://github.com/rails/rails/releases .. hope that helps

Zipho Mashologu

@zipho

thanks @kathyonu - i had some redundant migration script that was tripping me.

Marcos Koby

@klepsydra

rails question here. There is an association I need to modify, so that child model needs to remain after a parent model gets deleted.
How might I generate a migration so that in postrgresql, a foreign_key changes to 'ON DELETE SET NULL' ?

Manu

@mtancoigne:matrix.org

[m]

@klepsydra: Hello and welcome !

You can specify it on the relation declaration, in the parent model: has_many :<children>, dependent: :nullify

the foreign key field should be nullable at the database level for this to work

Marcos Koby

@klepsydra

Thanks @mtancoigne:matrix.org . I wrote a migration.rb file by hand:

 def change
    remove_foreign_key :babies, :parents 

    change_column :babies, :parent_id, :uuid, null: true  

    add_foreign_key "babies", "parents", on_delete: :nullify   
  end

I couldn't figure out if rails generate migration had some options to do this from a shell command.

Manu

@mtancoigne:matrix.org

[m]

I don't know either; I always write migrations by hand

Daniel Wilkowski

@Danon

You guys like OO?

Udhayakumarpt

@Udhayakumarpt

Hi All,

I am new to ruby on rails, while running bundle install on centos vm getting the below error

An error occurred while installing msgpack (1.5.2), and Bundler cannot continue.

In Gemfile:
bootsnap was resolved to 1.12.0, which depends on
msgpack

Udhayakumarpt

@Udhayakumarpt

Can anyone let me know if you have any solution for this error

Anshul Riyal

@anshulriyal_gitlab

@Udhayakumarpt I usually had something similar while working on window or ruby version dependency issues.. Try changing ruby version. Let me me know if that helps🤞

1 reply