Fueling Curiosity, One Insight at a Time

atob() function decodes a string of data which was encoded using Base64 encoding and btoa() method encodes the data

• ActiveSupport::TimeZone.all which likely fetches a list of available time zones supported by the ActiveSupport library in rails.
• Date::ABBR_DAYNAMES, which is an array containing abbreviated names of the days of the week (e.g., ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]). This array is provided by Ruby's Date class, making it convenient for developers to access the names of the days without manually typing them out.

While exploring a lengthy code file, we often need to see the available properties and methods without diving into their implementation. In VS Code, this is quite easy with "Fold Level 1" functionality. This feature collapses the code to display only the top-level structures, which makes it easier to understand the file's architecture without getting into the details.

To Use Fold Level 1:

1. Open Command Palette: Ctrl+Shift+P (Windows) or Cmd+Shift+P (macOS).
2. Select Fold Level 1: Now, only the main parts of our code will be visible.
#vs-code, #coding

Migration of a Repository from GitLab to GitHub:
1. Clone the GitLab Repository Locally

git clone <GitLab-repository-URL>
cd <repository-name>

2. Add the GitHub Repository as a Remote

git remote add github <GitHub-repository-URL>

3. Resolve any merge conflicts that may arise using rebase after pull

git pull github main

4. Push from your local repository to the GitHub repository

git push github main

Resolving blocked host:

The Blocked Host is a new feature of Rails 6. To resolve the Blocked Host error in rails, add config.hosts.clear to config/environments/development.rb in your Rails project. This disables the functionality in the development environment, allowing requests from ngrok.
#host-block-issue, #rails

Extract the source code of the gem to a local directory by using the command gem unpack GEMNAME.

Setup Tailscale in local device and serve your localhost
1. Intsall tailscale from https://tailscale.com/download for your device.
2. Sign up and follow the steps so that your device gets connected.
3. Open your terminal and download tailscale CLI using brew install tailscale
4. Run tailscale serve 3000 (you might get some warning regarding client and server version mismatch)
5. It will say Serve is not enabled on your tailnet. and ask you to visit https://login.tailscale.com/f/serve?node=<node-id>
6. In that link enable the option , and that's it , it will serve your port 3000 successfully.
#tailscale , #devops

While changing a column type from one type to another and running rails db:migrate , it will throw the below error

PG::DatatypeMismatch: ERROR:  column "tags" cannot be cast automatically to type jsonb
HINT:  You might need to specify "USING tags::jsonb".

above error ^ because i was converting tags field from type string to jsonb
so in order to fix this we have to mention the USING tags::jsonb and cast the type.

class ChangeTagsToJsonbInTils < ActiveRecord::Migration[7.0]
  def change
    change_column :tils, :tags, 'jsonb USING CAST(tags AS jsonb)'
  end
end

#migration, #database, #rails

Create a PostgreSQL Database in Docker .

Step 1: Download the latest version of the Postgres image :

 docker pull postgres

Step 2: Create and Run Postgres Container :

docker run -d --name  -p 5432:5432 -e POSTGRES_PASSWORD= postgres

Step 3: Verify Executing Container :

docker ps

Step 4: Interact with Executing Container :

docker exec -it  bash

Step 5: Connect to Postgresql Database Server :

psql -h localhost -U postgres

Step 6: Create Postgresql Database :

CREATE DATABASE ;
\l

Step 7: Establish a connection with database :

\c 

Step 8: Create Database User :

CREATE USER  with PASSWORD ;

Step 9: Exit :

 \q

#devops #docker

In a typical Rack middleware setup, the call method handles the initial request and generates a response, but it does not control subsequent redirects initiated by external services. If an external service, such as Slack's OAuth, triggers additional redirects after your application responds, modifying headers for those redirects within the same call method may not be directly achievable. Handling subsequent redirects may require alternative approaches, such as additional middleware or different parts of your application's code.
#rails , #rack , #middleware