homework

.rspec

@@ -0,0 +1 @@
+--require spec_helper

Gemfile

@@ -3,24 +3,33 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 ruby '2.6.3'
 
-gem 'rails', '~> 5.2.3'
+gem 'activerecord-import'
+gem 'bootsnap', '>= 1.1.0', require: false
+gem 'oj'
 gem 'pg', '>= 0.18', '< 2.0'
 gem 'puma', '~> 3.11'
-gem 'bootsnap', '>= 1.1.0', require: false
-
+gem 'rails', '~> 5.2.3'
 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 'bullet'
+  gem 'byebug', platforms: %i[mri mingw x64_mingw]
+  gem 'memory_profiler'
+  gem 'rspec-rails'
+  gem 'rspec-benchmark'
+  gem 'ruby-prof'
+  gem 'ruby-progressbar'
 end
-
 group :development do
+  gem 'meta_request'
   # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
-  gem 'web-console', '>= 3.3.0'
   gem 'listen', '>= 3.0.5', '< 3.2'
+  gem 'web-console', '>= 3.3.0'
 end
-
+gem 'pghero'
+gem 'pg_query', '>= 2'
+gem 'rack-mini-profiler', require: false
 group :test do
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]

Gemfile.lock

@@ -33,6 +33,8 @@ GEM
       activemodel (= 5.2.3)
       activesupport (= 5.2.3)
       arel (>= 9.0)
+    activerecord-import (1.5.0)
+      activerecord (>= 4.2)
     activestorage (5.2.3)
       actionpack (= 5.2.3)
       activerecord (= 5.2.3)
@@ -43,17 +45,25 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     arel (9.0.0)
+    benchmark-malloc (0.2.0)
+    benchmark-perf (0.6.0)
+    benchmark-trend (0.4.0)
     bindex (0.6.0)
     bootsnap (1.4.2)
       msgpack (~> 1.0)
     builder (3.2.3)
+    bullet (7.1.3)
+      activesupport (>= 3.0.0)
+      uniform_notifier (~> 1.11)
     byebug (11.0.1)
     concurrent-ruby (1.1.5)
     crass (1.0.4)
+    diff-lcs (1.5.0)
     erubi (1.8.0)
     ffi (1.10.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
+    google-protobuf (3.23.4)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     listen (3.1.5)
@@ -67,18 +77,33 @@ GEM
       mini_mime (>= 0.1.1)
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
+    memory_profiler (1.0.1)
+    meta_request (0.7.4)
+      rack-contrib (>= 1.1, < 3)
+      railties (>= 3.0.0, < 7.1)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     msgpack (1.2.9)
     nio4r (2.3.1)
     nokogiri (1.10.2)
       mini_portile2 (~> 2.4.0)
+    oj (3.14.2)
     pg (1.1.4)
+    pg_query (4.2.3)
+      google-protobuf (>= 3.22.3)
+    pghero (2.8.3)
+      activerecord (>= 5)
     puma (3.12.1)
     rack (2.0.6)
+    rack-contrib (2.4.0)
+      rack (< 4)
+    rack-mini-profiler (3.1.1)
+      rack (>= 1.2.0)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)
@@ -109,6 +134,34 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-benchmark (0.6.0)
+      benchmark-malloc (~> 0.2)
+      benchmark-perf (~> 0.6)
+      benchmark-trend (~> 0.4)
+      rspec (>= 3.0)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-rails (5.1.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
+      railties (>= 5.2)
+      rspec-core (~> 3.10)
+      rspec-expectations (~> 3.10)
+      rspec-mocks (~> 3.10)
+      rspec-support (~> 3.10)
+    rspec-support (3.12.1)
+    ruby-prof (1.4.3)
+    ruby-progressbar (1.13.0)
     ruby_dep (1.5.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
@@ -121,6 +174,7 @@ GEM
     thread_safe (0.3.6)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
+    uniform_notifier (1.16.0)
     web-console (3.7.0)
       actionview (>= 5.0)
       activemodel (>= 5.0)
@@ -134,12 +188,24 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  activerecord-import
   bootsnap (>= 1.1.0)
+  bullet
   byebug
   listen (>= 3.0.5, < 3.2)
+  memory_profiler
+  meta_request
+  oj
   pg (>= 0.18, < 2.0)
+  pg_query (>= 2)
+  pghero
   puma (~> 3.11)
+  rack-mini-profiler
   rails (~> 5.2.3)
+  rspec-benchmark
+  rspec-rails
+  ruby-prof
+  ruby-progressbar
   tzinfo-data
   web-console (>= 3.3.0)
 

app/controllers/trips_controller.rb

@@ -2,6 +2,6 @@ class TripsController < ApplicationController
   def index
     @from = City.find_by_name!(params[:from])
     @to = City.find_by_name!(params[:to])
-    @trips = Trip.where(from: @from, to: @to).order(:start_time)
+    @trips = Trip.includes(bus: :services).where(from: @from, to: @to).order(:start_time).load
   end
 end

app/models/bus.rb

@@ -13,7 +13,8 @@ class Bus < ApplicationRecord
   ].freeze
 
   has_many :trips
-  has_and_belongs_to_many :services, join_table: :buses_services
+  has_many :buses_services
+  has_many :services, through: :buses_services
 
   validates :number, presence: true, uniqueness: true
   validates :model, inclusion: { in: MODELS }

app/models/buses_service.rb

@@ -0,0 +1,4 @@
+class BusesService < ApplicationRecord
+  belongs_to :bus
+  belongs_to :service
+end

app/models/service.rb

@@ -9,10 +9,11 @@ class Service < ApplicationRecord
     'Телевизор общий',
     'Телевизор индивидуальный',
     'Стюардесса',
-    'Можно не печатать билет',
+    'Можно не печатать билет'
   ].freeze
 
-  has_and_belongs_to_many :buses, join_table: :buses_services
+  has_many :buses_services
+  has_many :buses, through: :buses_services
 
   validates :name, presence: true
   validates :name, inclusion: { in: SERVICES }

app/services/reload_json.rb

@@ -0,0 +1,107 @@
+# frozen_string_literal: true
+
+require 'oj'
+class ReloadJson
+  def initialize(file_name)
+    @file_name = file_name
+    @cities = {}
+    @buses = {}
+    @buses_services = []
+  end
+
+  def call
+    ActiveRecord::Base.transaction do
+      clear_tables
+      create_services
+
+      @connection = ActiveRecord::Base.connection.raw_connection
+      trips_command =
+        "copy trips (from_id, to_id, start_time, duration_minutes, price_cents, bus_id) from stdin with csv delimiter ';'"
+
+      @connection.copy_data trips_command do
+        File.open(file_name) do |ff|
+          nesting = 0
+          str = String.new
+
+          until ff.eof?
+            ch = ff.read(1) # читаем по одному символу
+            if ch == '{' # начинается объект, повышается вложенность
+              nesting += 1
+              str << ch
+            elsif ch == '}' # заканчивается объект, понижается вложенность
+              nesting -= 1
+              str << ch
+              if nesting.zero? # если закончился объкет уровня trip, парсим и импортируем его
+                trip = Oj.load(str)
+                copy_trip(trip)
+
+                str = String.new
+              end
+            elsif nesting >= 1
+              str << ch
+            end
+          end
+        end
+      end
+
+      Bus.import buses.values
+      City.import cities.values
+      BusesService.import buses_services
+    end
+  end
+
+  private
+
+  attr_reader :cities, :buses, :buses_services, :services, :file_name
+
+  def create_services
+    services = []
+    Service::SERVICES.each do |name|
+      services << Service.new(name: name)
+    end
+    Service.import services
+    @services = Service.all.to_h { |service| [service.name, service.id] }
+  end
+
+  def clear_tables
+    City.delete_all
+    Bus.delete_all
+    Service.delete_all
+    Trip.delete_all
+    BusesService.delete_all
+  end
+
+  def copy_trip(trip)
+    from_id = cities.dig(trip['from'], 'id')
+    to_id = cities.dig(trip['to'], 'id')
+    service_ids = services.values_at(*trip['bus']['services'])
+    bus_key = "#{trip['bus']['model']} #{trip['bus']['number']}"
+    bus_id = buses.dig(bus_key, 'id')
+
+    unless from_id
+      id = cities.size + 1
+      cities[trip['from']] = { 'id' => id, 'name' => trip['from'] }
+      from_id = id
+    end
+
+    unless to_id
+      if cities[trip['from']] == @cities[trip['to']]
+        to_id = from_id
+      else
+        id = cities.size + 1
+        @cities[trip['to']] = { 'id' => id, 'name' => trip['to'] }
+        to_id = id
+      end
+    end
+
+    unless bus_id
+      id = buses.size + 1
+      buses[bus_key] =
+        { 'id' => id, 'number' => trip['bus']['number'], 'model' => trip['bus']['model'] }
+      service_ids.each { |service_id| buses_services << { 'service_id' => service_id, 'bus_id' => id } }
+      bus_id = id
+    end
+
+    @connection.put_copy_data("#{from_id};#{to_id};#{trip['start_time']};#{trip['duration_minutes']};#{trip['price_cents']};#{bus_id}\n")
+  end
+end

app/views/trips/_trip.html.erb

@@ -1,5 +1,16 @@
-<li><%= "Отправление: #{trip.start_time}" %></li>
-<li><%= "Прибытие: #{(Time.parse(trip.start_time) + trip.duration_minutes.minutes).strftime('%H:%M')}" %></li>
-<li><%= "В пути: #{trip.duration_minutes / 60}ч. #{trip.duration_minutes % 60}мин." %></li>
-<li><%= "Цена: #{trip.price_cents / 100}р. #{trip.price_cents % 100}коп." %></li>
-<li><%= "Автобус: #{trip.bus.model} №#{trip.bus.number}" %></li>
+<ul>
+  <li><%= "Отправление: #{trip.start_time}" %></li>
+  <li><%= "Прибытие: #{(Time.parse(trip.start_time) + trip.duration_minutes.minutes).strftime('%H:%M')}" %></li>
+  <li><%= "В пути: #{trip.duration_minutes / 60}ч. #{trip.duration_minutes % 60}мин." %></li>
+  <li><%= "Цена: #{trip.price_cents / 100}р. #{trip.price_cents % 100}коп." %></li>
+  <li><%= "Автобус: #{trip.bus.model} №#{trip.bus.number}" %></li>
+  <% if trip.bus.services.present? %>
+    <li>Сервисы в автобусе:</li>
+    <ul>
+      <% trip.bus.services.each do |service| %>
+        <li><%= "#{service.name}" %></li>
+      <% end %>
+    </ul>
+  <% end %>
+</ul>
+====================================================

app/views/trips/index.html.erb

@@ -2,15 +2,7 @@
   <%= "Автобусы #{@from.name} – #{@to.name}" %>
 </h1>
 <h2>
-  <%= "В расписании #{@trips.count} рейсов" %>
+  <%= "В расписании #{@trips.size} рейсов" %>
 </h2>
 
-<% @trips.each do |trip| %>
-  <ul>
-    <%= render "trip", trip: trip %>
-    <% if trip.bus.services.present? %>
-      <%= render "services", services: trip.bus.services %>
-    <% end %>
-  </ul>
-  <%= render "delimiter" %>
-<% end %>
+<%= render partial: 'trip', collection: @trips, as: :trip %>