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begin | |
require 'bundler/inline' | |
rescue LoadError => e | |
$stderr.puts 'Bundler version 1.10 or later is required.' | |
raise e | |
end | |
gemfile(true) do | |
source 'https://rubygems.org' | |
gem 'rom' | |
gem 'rom-sql' | |
gem 'rom-repository' | |
gem 'sqlite3' | |
gem 'rspec' | |
gem 'pry' | |
end | |
require 'rspec/autorun' | |
class User < Dry::Struct | |
attribute :name, Dry::Types['strict.string'] | |
end | |
class Post < Dry::Struct | |
attribute :title, Dry::Types['strict.string'] | |
attribute :user, User | |
end | |
class UsersMapper < ROM::Mapper | |
relation :users | |
register_as :entity | |
attribute :name, from: :nname | |
model User | |
end | |
describe ROM::Repository do | |
let(:rom) { ROM.container(configuration) } | |
let(:configuration) do | |
ROM::Configuration.new(:sql, 'sqlite::memory').tap do |config| | |
config.default.create_table(:users) do | |
primary_key :id | |
column :nname, String, null: false | |
end | |
config.default.create_table(:posts) do | |
primary_key :id | |
foreign_key :user_id, :users, null: false | |
column :title, String, null: false | |
end | |
config.relation(:users) do | |
schema(infer: true) | |
view :as_entity do | |
schema { rename(nname: :name) } | |
relation { as(:entity) } | |
end | |
end | |
config.register_mapper(UsersMapper) | |
end | |
end | |
let(:repo) do | |
Class.new(ROM::Repository[:posts]) do | |
relations :users | |
def all | |
posts.combine_parents(one: users.as_entity).as(Post).to_a | |
end | |
end.new(rom) | |
end | |
before { create_post(title: 'post_title', user_name: 'Sergiy') } | |
it 'fetches 1 record' do | |
expect(repo.all.count).to eq 1 | |
end | |
it 'builds User' do | |
expect(repo.users.as(:entity).first).to be_a(User) | |
end | |
let(:first) { repo.all.first } | |
it 'builds Post struct' do | |
expect(first).to be_a(Post) | |
expect(first.title).to eq 'post_title' | |
expect(first.user.name).to eq 'Sergiy' | |
end | |
def create_post(attrs) | |
user_id = rom.relations[:users].insert(nname: attrs.fetch(:user_name)) | |
rom.relations[:posts].insert(title: attrs.fetch(:title), user_id: user_id) | |
end | |
end |
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Let's assume as fact, that we need to map record from
users
table in order to create User entity. For simplicity, we just need to rename:nname
into:name
. And we want to combineposts
relation with its parentusers
.Test fails, because mapping isn't called, while
repo.users.as(:entity)
maps users toUser
struct without problems