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Elastic Search

Elasticsearch is a real time search engine where a change to an index will be propegated to the whole cluster within a second.

An elasticsearch cluster indicated as one or more nodes, collection of nodes containing all the data, default cluster name is elasticserach.

A node is a single server and part of a cluster, node participate in searching and indexing.

Index is collection of documents equavalent to a database within a relational system, index name must be lowercase Type is represetn a class = table

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# This is a skeleton for testing models including examples of validations, callbacks,
# scopes, instance & class methods, associations, and more.
# Pick and choose what you want, as all models don't NEED to be tested at this depth.
#
# I'm always eager to hear new tips & suggestions as I'm still new to testing,
# so if you have any, please share!
#
# @kyletcarlson
#
# This skeleton also assumes you're using the following gems: 

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require 'rails_helper'

RSpec.describe TodosController, :type => :controller do

  context "GET index" do
  #context "POST create" do
  #context "GET show" do
  #context "PATCH update" do (or PUT update)
  #context "DELETE destroy" do
  #context "GET new" do

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Capybara

save_and_open_page

Matchers

have_button(locator)

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1. Gemfile

gem 'browserify-rails', '1.5.0' # until fix: https://github.com/browserify-rails/browserify-rails/issues/101
gem 'react-rails'

Browserify-rails allows to use browserify within assets pipeline. React-rails is here only to allow to use #react_component (and thus, prerendering).

Note that jquery-rails can be removed from Gemfile, the npm version of jquery and jquery-ujs will be used instead.

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curl -XPUT 'http://localhost:9200/us/user/1?pretty=1' -d '
{
   "email" : "[email protected]",
   "name" : "John Smith",
   "username" : "@john"
}
'

curl -XPUT 'http://localhost:9200/gb/user/2?pretty=1' -d '
{

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Override Devise RegistrationsController

Overview

Here I'll show you

• How to override devise registrations_controller(related to create/update user account)
• How to change redirect path after updating user

Override RegistrationsController

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Rails Migration

http://guides.rubyonrails.org/migrations.html

Migrations methods:

• add_column
• add_index
• change_column
• change_table
• create_table
• drop_table

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Update and upgrade the system

sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade && sudo apt-get autoremove
sudo reboot

Configure timezone

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#Developer : Anshul Patel
#Put the file in /etc/systemd/system
#Make sure that the elasticsearch and run directory have permission of appropriate user
#In order to start it during boot, sudo systemctl enable elasticsearch

[Unit]
Description=ElasticSearch Service
After=network.target

[Service]