sujay
Thu Jul 25 2024
Remove the published gem from rubygems using
gem yank GEM -v VERSION
#rails #rubygems
satya
Thu Jul 25 2024
while using form.file_field
for file attachments we can restrict the file type to any type if we want.
For eg: if we want to accept file of type image
then we can pass accept
attribute.
<%= form.file_field :picture, accept: "image/*" %>
Note: This will disable other file types in your local file dialog while enabling the image files only :magic_wand: . #rails , #active-storage
sujay
Thu Jul 25 2024
To ensure a dependency is installed with the engine during gem install, it must be specified within the Gem::Specification
block inside the engine's .gemspec
file (e.g., blog.gemspec
for an engine named Blog, located at the root)
s.add_dependency "pagy"
#rails #rails-engines
syedsibtain
Tue Jul 23 2024
In Rails, gems are libraries that add specific functionality to a Rails application. They can be used across different projects and typically do not have their own structure or generators.
Examples include devise
for authentication and nokogiri
for XML parsing.
Engines, on the other hand, are miniature Rails applications that can have their own routes, controllers, models, and views. They are used to encapsulate and modularize specific features or components within a Rails app. An engine can be packaged as a gem, but it provides more extensive, self-contained functionality compared to a typical gem.
#rails
sujay
Fri Jul 19 2024
A Rails engine is a pattern used to modularize a Rails application. These engines are self-contained applications with their own models, views, controllers, and routes, allowing them to function autonomously. They can be integrated into a larger Rails application. For example, in an e-commerce application, modules like orders, products, users, and payments can each be separate engines. #rails
pavankumarreddy
Fri Jul 19 2024
Resolving gen_random_uuid()
Error with PostgreSQL While Implementing CI
When configuring CI with GitHub Actions, I encountered the following error:
PG::UndefinedFunction: ERROR: function gen_random_uuid() does not exist
This error occurred because the gen_random_uuid()
function is not available in PostgreSQL versions older than 11. UUID generation functions were only available through external modules like uuid-ossp
and pgcrypto
in these older versions.
To resolve this issue, I upgraded to PostgreSQL 13, which includes the gen_random_uuid()
function to generate version-4 UUIDs. After upgrading, the error was resolved.
#rails #postgresql #uuid #ci-cd #github-actions
adithya.hebbar
Wed Jul 17 2024
Jupyter Labs
• To install Jupyter Labs
in Mac using Homebrew
:
brew install jupyterlab
• To run Jupyter lab:
jupyter lab
This will open JupyterLab in your default web browser.
#python #homebrew
giritharan
Tue Jul 16 2024
The fields_for
helper in Rails creates form bindings without rendering a <form>
tag. This is particularly useful for rendering fields for additional model objects within a single form.
Imagine you have a Book
model with an associated Author
model. You can create a single form for both the Book
and Author
models using the fields_for
helper.
<%= form_with model: @book do |book_form| %>
<%= book_form.text_field :title %>
<%= book_form.text_area :description %>
<%= fields_for :author, @book.author do |author_form| %>
<%= author_form.text_field :name %>
<%= author_form.text_field :email %>
<% end %>
<% end %>
#rails #fields-for #rails-view
pavankumarreddy
Tue Jul 16 2024
rails db:prepare
in Ruby on Rails, This command sets up and prepares the database for my application, ensuring everything's ready to go, including populating the database.
#rails #databasesetup
soniya.rayabagi
Mon Jul 15 2024
Handling Terraform State Errors with S3 Backend:
We use an S3 bucket to store our Terraform state. If Terraform fails to update the state, it creates an errored.tfstate
file in your working directory. Reapplying will cause errors because the resources already exist.
To fix this, push the errored state back to S3:
terraform state push errored.tfstate
#devops #terraformstateS3 #errorhandling
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