Do not use Elasticsearch

.travis.yml

@@ -34,11 +34,6 @@ env:
     - RAILS_CACHE_REDIS_DB=1
     - RAILS_CACHE_REDIS_PASSWORD=
 
-    - ELASTICSEARCH_HOST=localhost
-    - ELASTICSEARCH_PORT=9200
-    - ELASTICSEARCH_USER=elastic
-    - ELASTICSEARCH_PASSWORD=changeme
-
 before_install:
   - wget https://github.com/mozilla/geckodriver/releases/download/v0.23.0/geckodriver-v0.23.0-linux64.tar.gz
   - sudo tar -xvzf geckodriver*
@@ -46,11 +41,6 @@ before_install:
   - sudo mv geckodriver /usr/local/bin/
   - geckodriver --version
 
-  - curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.5.1-amd64.deb
-  - sudo dpkg -i --force-confnew elasticsearch-7.5.1-amd64.deb
-  - sudo chown -R elasticsearch:elasticsearch /etc/default/elasticsearch
-  - sudo systemctl restart elasticsearch.service
-
 install: script/setup
 
 script: bundle exec rake all

Gemfile

@@ -12,8 +12,6 @@ gem 'bootsnap', '>= 1.4.0', require: false
 gem 'bootstrap', '~> 4.3.1'
 gem 'devise', '~> 4.7'
 gem 'devise-i18n', '~> 1.8'
-gem 'elasticsearch-model', '~> 7.0'
-gem 'elasticsearch-rails', '~> 7.0'
 gem 'font-awesome-sass', '~> 5.5.0'
 gem 'interactor', '~> 3.1'
 gem 'jquery-rails', '~> 4.3'

Gemfile.lock

@@ -178,19 +178,6 @@ GEM
     docile (1.3.2)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    elasticsearch (7.4.0)
-      elasticsearch-api (= 7.4.0)
-      elasticsearch-transport (= 7.4.0)
-    elasticsearch-api (7.4.0)
-      multi_json
-    elasticsearch-model (7.0.0)
-      activesupport (> 3)
-      elasticsearch (> 1)
-      hashie
-    elasticsearch-rails (7.0.0)
-    elasticsearch-transport (7.4.0)
-      faraday
-      multi_json
     erubi (1.9.0)
     execjs (2.7.0)
     factory_bot (4.11.1)
@@ -504,8 +491,6 @@ DEPENDENCIES
   database_cleaner (~> 1.7)
   devise (~> 4.7)
   devise-i18n (~> 1.8)
-  elasticsearch-model (~> 7.0)
-  elasticsearch-rails (~> 7.0)
   factory_bot_rails (~> 4.10)
   faker (~> 1.8)
   font-awesome-sass (~> 5.5.0)

app/models/account.rb

@@ -1,16 +1,6 @@
 # frozen_string_literal: true
 
 class Account < ApplicationRecord
-  include Searchable
-
-  settings index: { number_of_shards: 1 } do
-    mapping dynamic: false do
-      indexes :nickname,    analyzer: 'english'
-      indexes :public_name, analyzer: 'russian'
-      indexes :biography,   analyzer: 'russian'
-    end
-  end
-
   ################
   # Associations #
   ################

app/models/concerns/searchable.rb

@@ -1,10 +0,0 @@
-# frozen_string_literal: true
-
-module Searchable
-  extend ActiveSupport::Concern
-
-  included do
-    include Elasticsearch::Model
-    include Elasticsearch::Model::Callbacks
-  end
-end

app/models/person.rb

@@ -2,19 +2,9 @@
 
 class Person < ApplicationRecord
   include Nameable
-  include Searchable
 
   ACCOUNT_CONNECTION_TOKEN_RE = /\A\w+\z/.freeze
 
-  settings index: { number_of_shards: 1 } do
-    mapping dynamic: false do
-      indexes :first_name,     analyzer: 'russian'
-      indexes :middle_name,    analyzer: 'russian'
-      indexes :last_name,      analyzer: 'russian'
-      indexes :place_of_birth, analyzer: 'russian'
-    end
-  end
-
   ################
   # Associations #
   ################

config/application.rb

@@ -17,8 +17,6 @@ require 'sprockets/railtie'
 # you've limited to :test, :development, :staging, or :production.
 Bundler.require(*Rails.groups)
 
-require 'elasticsearch/rails/instrumentation'
-
 require 'csv'
 
 module Partynest

config/initializers/elasticsearch.rb

@@ -1,18 +0,0 @@
-# frozen_string_literal: true
-
-# Be sure to restart your server when you modify this file.
-
-conf = Rails.application.settings :elasticsearch
-
-Elasticsearch::Model.client = Elasticsearch::Client.new(
-  scheme: conf[:ssl] ? :https : :http,
-  host: String(conf[:host]),
-  port: Integer(conf[:port]),
-  user: String(conf[:user]),
-  password: String(conf[:password]),
-
-  transport_options: {
-    request: { timeout: 5 },
-    ssl: { ca_file: conf.dig(:ssl_params, :ca_file) },
-  },
-)

config/settings/elasticsearch.yml

@@ -1,20 +0,0 @@
-default: &default
-  host:     <%= ENV.fetch('ELASTICSEARCH_HOST')     { 'localhost' } %>
-  port:     <%= ENV.fetch('ELASTICSEARCH_PORT')     { 9200        } %>
-  user:     <%= ENV.fetch('ELASTICSEARCH_USER')     { 'elastic'   } %>
-  password: <%= ENV.fetch('ELASTICSEARCH_PASSWORD') { 'changeme'  } %>
-  ssl:      false
-  ssl_params:
-    ca_file: null
-
-development:
-  <<: *default
-
-test:
-  <<: *default
-
-staging:
-  <<: *default
-
-production:
-  <<: *default

lib/tasks/elasticsearch.rake

@@ -1,6 +0,0 @@
-# frozen_string_literal: true
-
-require 'elasticsearch/rails/tasks/import'
-
-Rake::Task['elasticsearch:import:all'].prerequisites << :environment
-Rake::Task['elasticsearch:import:model'].prerequisites << :environment