test/test_associations.rb

gistfile1.txt

require 'test_helper'

module Thing
class Address
  include MongoMapper::EmbeddedDocument

  key :address, String
  key :city,    String
  key :state,   String
  key :zip,     Integer
end
end

module Thing
class Project
  include MongoMapper::Document

  key :name, String

  many :statuses, :class_name => 'Thing::Status'
  many :addresses, :class_name => 'Thing::Address'
end
end

module Thing
class Status
  include MongoMapper::Document

  belongs_to :project, :class_name => 'Thing::Project'
  belongs_to :target, :polymorphic => true, :class_name => 'Thing::Target'

  key :name, String
end
end

module Thing
class Person
  include MongoMapper::EmbeddedDocument
  key :name, String
  key :child, Thing::Person
end
end

class AssociationsTest < Test::Unit::TestCase
  def setup
    Thing::Project.collection.clear
    Thing::Status.collection.clear
  end

  context "Polymorphic Belongs To" do
    should "default to nil" do
      status = Thing::Status.new
      status.target.should be_nil
    end

    should "store the association" do
      status = Thing::Status.new
      project = Thing::Project.new(:name => "mongomapper")
      status.target = project
      status.save.should be_true

      from_db = Thing::Status.find(status.id)
      from_db.target.should_not be_nil
      from_db.target_id.should == project.id
      from_db.target_type.should == "Thing::Project"
      from_db.target.name.should == "mongomapper"
    end

    should "unset the association" do
      status = Thing::Status.new
      project = Thing::Project.new(:name => "mongomapper")
      status.target = project
      status.save.should be_true

      from_db = Thing::Status.find(status.id)
      from_db.target = nil
      from_db.target_type.should be_nil
      from_db.target_id.should be_nil
      from_db.target.should be_nil
    end
  end

  context "Belongs To" do
    should "default to nil" do
      status = Thing::Status.new
      status.project.should be_nil
    end

    should "store the association" do
      status = Thing::Status.new
      project = Thing::Project.new(:name => "mongomapper")
      status.project = project
      status.save.should be_true

      from_db = Thing::Status.find(status.id)
      from_db.project.should_not be_nil
      from_db.project.name.should == "mongomapper"
    end

    should "unset the association" do
      status = Thing::Status.new
      project = Thing::Project.new(:name => "mongomapper")
      status.project = project
      status.save.should be_true

      from_db = Thing::Status.find(status.id)
      from_db.project = nil
      from_db.project.should be_nil
    end
  end

  context "Many documents" do
    should "default reader to empty array" do
      project = Thing::Project.new
      project.statuses.should == []
    end

    should "allow adding to association like it was an array" do
      project = Thing::Project.new
      project.statuses << Thing::Status.new
      project.statuses.push Thing::Status.new
      project.statuses.size.should == 2
    end

    should "store the association" do
      project = Thing::Project.new
      project.statuses = [ Thing::Status.new("name" => "ready") ]
      project.save.should be_true

      from_db = Thing::Project.find(project.id)
      from_db.statuses.size.should == 1
      from_db.statuses[0].name.should == "ready"
    end
  end

  context "Many embedded documents" do
    should "default reader to empty array" do
      project = Thing::Project.new
      project.addresses.should == []
    end

    should "allow adding to association like it was an array" do
      project = Thing::Project.new
      project.addresses << Thing::Address.new
      project.addresses.push Thing::Address.new
      project.addresses.size.should == 2
    end

    should "be embedded in document on save" do
      sb = Thing::Address.new(:city => 'South Bend', :state => 'IN')
      chi = Thing::Address.new(:city => 'Chicago', :state => 'IL')
      project = Thing::Project.new
      project.addresses << sb
      project.addresses << chi
      project.save

      from_db = Thing::Project.find(project.id)
      from_db.addresses.size.should == 2
      from_db.addresses[0].should == sb
      from_db.addresses[1].should == chi
    end
    
    should "allow embedding arbitrarily deep" do
      @document = Class.new do
        include MongoMapper::Document
        key :person, Thing::Person
      end
      
      meg = Thing::Person.new(:name => "Meg")
      meg.child = Thing::Person.new(:name => "Steve")
      meg.child.child = Thing::Person.new(:name => "Linda")
      
      doc = @document.new(:person => meg)
      doc.save
      
      from_db = @document.find(doc.id)
      from_db.person.name.should == 'Meg'
      from_db.person.child.name.should == 'Steve'
      from_db.person.child.child.name.should == 'Linda'
    end
  end
end