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April 23, 2024 07:49
Tenants
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require 'bundler/inline' | |
gemfile do | |
source 'https://rubygems.org' | |
gem 'activerecord' | |
gem 'mysql2' | |
end | |
require 'active_record' | |
ActiveRecord::Base.establish_connection( | |
adapter: 'mysql', | |
host: 'localhost', | |
username: 'root', | |
database: 'tenants' | |
) | |
class ApplicationRecord < ActiveRecord::Base | |
self.abstract_class = true | |
end | |
class Apartment < ApplicationRecord | |
has_many :properties | |
has_many :tenants, through: :properties | |
end | |
class Tenant < ApplicationRecord | |
has_many :properties | |
has_many :apartments, through: :properties | |
end | |
class Property < ApplicationRecord | |
belongs_to :apartment | |
belongs_to :tenant | |
end | |
def migrate | |
ActiveRecord::Schema.define do | |
create_table(:apartments) do |t| | |
t.string :unit_number, null: false | |
end | |
create_table(:tenants) do |t| | |
t.string :name, null: false | |
end | |
create_table(:properties) do |t| | |
t.references :apartment, null: false, foreign_key: true | |
t.references :tenant, null: false, foreign_key: true | |
end | |
end | |
end | |
migrate | |
puts 'Create Apartments' | |
apartment_records = 1_000_000.times.map do |i| | |
{ unit_number: "apartment_#{i}" } | |
end | |
Apartment.insert_all(apartment_records) | |
puts 'Create Tenants' | |
tenant_records = 1_000_000.times.map do |i| | |
{ name: "tenant_#{i}" } | |
end | |
Tenant.insert_all(tenant_records) | |
puts 'Create Properties' | |
apartment_ids = Apartment.pluck(:id) | |
tenant_ids = Tenant.pluck(:id) | |
property_records = tenant_ids.flat_map do |tenant_id| | |
rand(4).times.map do |i| | |
{ tenant_id: tenant_id, apartment_id: apartment_ids.sample } | |
end | |
end | |
property_records.each_slice(1000) do |slice| | |
Property.insert_all(slice) | |
end |
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