Sum of an Array

 Given an array [1,2,34,5,6,7,8,9], sum it up using a method:

def sum(array)
  return array.inject(:+)
end

Ruby install for new system and Rbenv

 

sudo apt install curl
curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt-get update
sudo apt-get install git-core zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev software-properties-common libffi-dev nodejs yarn

sudo apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

Got this error: gpg: keyserver receive failed: Server indicated a failure

--------------------------------------------------------------------------------------------------

Then run for this command: 

curl -sSL https://get.rvm.io | bash -s stable

then got this error:




Downloading https://github.com/rvm/rvm/archive/1.29.12.tar.gz

Downloading https://github.com/rvm/rvm/releases/download/1.29.12/1.29.12.tar.gz.asc

gpg: Signature made Saturday 16 January 2021 12:16:22 AM IST

gpg:                using RSA key 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

gpg: Can't check signature: No public key

GPG signature verification failed for '/home/sadhna/.rvm/archives/rvm-1.29.12.tgz' - 'https://github.com/rvm/rvm/releases/download/1.29.12/1.29.12.tar.gz.asc'! Try to install GPG v2 and then fetch the public key:

    gpg2 --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

or if it fails:

    command curl -sSL https://rvm.io/mpapis.asc | gpg2 --import -

    command curl -sSL https://rvm.io/pkuczynski.asc | gpg2 --import -

In case of further problems with validation please refer to https://rvm.io/rvm/security

-----------------------------------------------------------------------------------------------------------

Follow this link: https://rvm.io/rvm/security

Then run: gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

Then run command: curl -sSL https://get.rvm.io | bash -s stable

Then run tow command:

command1 curl -sSL https://rvm.io/mpapis.asc | gpg2 --import -

command2 curl -sSL https://rvm.io/pkuczynski.asc | gpg2 --import -

---------------------------------------------------------------------------------------------------------------

Then rvm install: rvm install 2.6.7

So got this error: 

Error running 'requirements_debian_update_system ruby-2.6.7',

please read /home/sadhna/.rvm/log/1624518537_ruby-2.6.5/update_system.log

Requirements installation failed with status: 100.

---------------------------------------------------------------------------------------

Solve this error: 

Run this command: rvm autolibs disable

Then run rvm install : rvm install 2.6.7

Getting this error: 

No command 'rvm' found, but there are 20 similar ones

Solve

1. source ~/.rvm/scripts/rvm
2. rvm requirements

Finally ruby install 

-------------------------------------------------------------------------

Install ruby on ubuntu 22

Ubuntu 22

https://github.com/rvm/ubuntu_rvm/issues/67

$ cd /usr/local/src/
$ sudo wget https://www.openssl.org/source/openssl-1.1.1n.tar.gz
$ sudo tar -xf openssl-1.1.1n.tar.gz
$ cd openssl-1.1.1n
$ sudo ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl shared zlib
$ sudo make
$ sudo make install
$ sudo rmdir certs
$ sudo ln -sf /etc/ssl/certs/ certs

rvm install 3.1.2 --with-openssl-dir=/usr/local/ssl
Install Rbenv: https://www.swhosting.com/en/comunidad/manual/how-to-install-ruby-on-rails-with-rbenv-on-ubuntu-2204

 

Create coverage file

 https://github.com/simplecov-ruby/simplecov

==================================

Add gem file:

group :development, :test do

  # Call 'byebug' anywhere in the code to stop execution and get a debugger console

  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]

  gem 'simplecov', require: false

end

then install bundle install

==================================

Add a spec/spec_helper.rb

require 'simplecov'

RSpec.configure do |config|

  SimpleCov.start 'rails'

end

==================================

Password is not required

For User Model 

validates :password, :presence => true, :on => :create

before_save :password_required?

before_update :password_required?

def password_required?

    if self.password.present?

      true

    else

      false

    end

  end

Mysql dum on server

mysqldump -h HOST_NAME -u USER_NAME -p DATABASE_NAME > fittac_dev_07_01_2021.sql

Then Enter Password.

Image upload by active storage

 

https://www.dailysmarty.com/posts/steps-for-using-active-storage-to-upload-files-to-s3-with-ruby-on-rails

https://github.com/jeygeethan/activestorage-backblaze

Add gem:

gem 'activestorage-backblaze'   is gem only user for backblaze ke liye hai.

gem "aws-sdk-s3", require: false

Image upload on backblaze:

backblaze:

  service: Backblaze

  bucket_name: <%= ENV['BUCKET_NAME'] %>

  bucket_id: <%= ENV['BUCKET_ID'] %>

  key_id: <%= ENV['KEY_ID'] %>

  key_token: <%= ENV['KEY_TOKEN'] %>

Run the command:

rails active_storage:install

Followed by:

rails db:migrate

 

Step 2 - Update Storage Parameters

In the config/storage.yml file, uncomment the 'amazon' configuration options. Make sure to add your region and bucket name.

Add this code config/storage.yml

amazon:

  service: S3

  access_key_id: <%= ENV['AWS_ACCESS_KEY'] %>

  secret_access_key: <%= ENV['AWS_SECRET_KEY'] %>

  region: <%= ENV['AWS_RESION'] %>

  bucket: <%= ENV['AWS_BUCKET'] %>

==============================================

In the config/environments/development.rb there should be a line that says:

config.active_storage.service = :local

And in the config/environments/production.rb you'll need to remove the line:

config.active_storage.service = :local

And add the line:

This is amazon

config.active_storage.service = :amazon

=============================================

This is backblaze

config.active_storage.service = :backblaze

=============================================

Add a model:

has_one_attached :featured_image

==============================================

Image upload form minio

Add this code config/storage.yml

minio_dev:

  service: S3

  access_key_id: <%= ENV['STORAGE_ACCESS_KEY'] %>

  secret_access_key: <%= ENV['STORAGE_SECRET_ACCESS_KEY'] %>

  region: <%= ENV['STORAGE_REGION'] %>

  bucket: <%= ENV['STORAGE_BUCKET'] %>

  endpoint: <%= ENV['Endpoint'] %>

  force_path_style: true

and config/development.rb and production.rb

config.active_storage.service = :minio_dev

---------------------------------

If in case getting this erro:
undefined method `has_one_attached' for #<Class:0x000055cfabb92460> (NoMethodError)

Add this line in application.rb

ActiveSupport.on_load(:active_record) do
  include ActiveStorage::Reflection::ActiveRecordExtensions
  ActiveRecord::Reflection.singleton_class.prepend(ActiveStorage::Reflection::ReflectionExtension)
  include ActiveStorage::Attached::Model
end

On top:

attribute :profile_image do |object|

      if object.profile_pic.attached?

        # ENV["API_BASE_URL"] + Rails.application.routes.url_helpers.rails_blob_url(object.profile_pic, only_path: true)

        object.profile_pic.service_url

      end

    end

elasticsearch Install And Setup Elasticsearch Engine On Linux

 Elasticsearch install step by step

java -v

java -version

echo $JAVA_HOME

ls /usr/lib/jvm//java-

for Result

java-1.7.0-openjdk-amd64/ java-1.8.0-openjdk-amd64/ java-7-openjdk-amd64/     java-8-openjdk-amd64/

==============================================================

for run Tab ke through check karna hai: echo /usr/lib/jvm/java-8-openjdk-amd64/

==============================================================

Set environment variable:

sudo nano /etc/environment

JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/

PATH=$PATH:$HOME/bin:$JAVE_HOME/bin

export JAVE_HOME

export JRE_HOME

export PATH

============================================================

Run: echo $JAVA_HOME

For result: /usr/lib/jvm/java-8-openjdk-amd64/

===================================================================

sudo apt-get install apt-transport-https

==================================================================

wget https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -

====================================================================

sudo add-apt-repository "deb https://artifacts.elastic.co/packages/6.x/apt stable main"

==================================================================

sudo apt update

=====================================

sudo apt install elasticsearch

Getting this error: sudo apt install elasticsearch

Reading package lists... Done

Building dependency tree       

Reading state information... Done

E: Unable to locate package elasticsearch

For solve: 
On terminal: wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/elasticsearch-archive-keyring.gpg] https://artifacts.elastic.co/packages/7.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-7.x.list > /dev/null

sudo apt update

sudo apt-get install elasticsearch

sudo systemctl enable elasticsearch

------------------------------------------------

When getting this error:

sudo systemctl enable elasticsearch Synchronizing state of elasticsearch.service with SysV service script with /lib/systemd/systemd-sysv-install. Executing: /lib/systemd/systemd-sysv-install enable elasticsearch

Then run this command: sudo systemctl is-enabled elasticsearch

---------------------------------------------

sudo systemctl start elasticsearch

Check the status: sudo systemctl status elasticsearch

====================================

sudo nano /etc/elasticsearch/elasticsearch.yml
is file me must nhi hai change karna, kyu ki default me port 9200 hota hai and host 127.0.0.1 hota hai

Only for:

Uncomment line

cluster.name: my-elasticsearch

node.name: elasticsearch-1

path.data: /var/lib/elasticsearch

path.logs: /var/log/elasticsearch

http.port: 9200

=====================================

sudo systemctl start elasticsearch

======================================

Check status:

sudo systemctl status elasticsearch.service

For this resulte

elasticsearch.service - Elasticsearch

   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)

   Active: active (running) since Thu 2020-11-05 17:48:01 IST; 11s ago

     Docs: https://www.elastic.co

 Main PID: 8632 (java)

    Tasks: 63

   Memory: 1.2G

      CPU: 59.206s

   CGroup: /system.slice/elasticsearch.service

           ├─8632 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10

           └─8831 /usr/share/elasticsearch/modules/x-pack-ml/platform/linux-x86_64/bin/controller

======================================

curl -X GET http://127.0.0.1:9200

{

  "name" : "elasticsearch-1",

  "cluster_name" : "my-elasticsearch",

  "cluster_uuid" : "OL-ZPjVBTcG4b9HlEgnOdw",

  "version" : {

    "number" : "7.9.3",

    "build_flavor" : "default",

    "build_type" : "deb",

    "build_hash" : "c4138e51121ef06a6404866cddc601906fe5c868",

    "build_date" : "2020-10-16T10:36:16.141335Z",

    "build_snapshot" : false,

    "lucene_version" : "8.6.2",

    "minimum_wire_compatibility_version" : "6.8.0",

    "minimum_index_compatibility_version" : "6.0.0-beta1"

  },

  "tagline" : "You Know, for Search"

}

==============================================

Link: https://www.youtube.com/watch?v=63nS1Z-pIfI