path: root/activerecord/test/associations_test.rb

require 'abstract_unit'
require 'fixtures/developer'
require 'fixtures/project'
require 'fixtures/company'
require 'fixtures/topic'
require 'fixtures/reply'
require 'fixtures/computer'
require 'fixtures/customer'
require 'fixtures/order'
require 'fixtures/post'
require 'fixtures/author'

# Can't declare new classes in test case methods, so tests before that
bad_collection_keys = false
begin
  class Car < ActiveRecord::Base; has_many :wheels, :name => "wheels"; end
rescue ArgumentError
  bad_collection_keys = true
end
raise "ActiveRecord should have barked on bad collection keys" unless bad_collection_keys


class AssociationsTest < Test::Unit::TestCase
  fixtures :accounts, :companies, :developers, :projects, :developers_projects,
           :computers

  def test_force_reload
    firm = Firm.new("name" => "A New Firm, Inc")
    firm.save
    firm.clients.each {|c|} # forcing to load all clients
    assert firm.clients.empty?, "New firm shouldn't have client objects"
    assert !firm.has_clients?, "New firm shouldn't have clients"
    assert_equal 0, firm.clients.size, "New firm should have 0 clients"

    client = Client.new("name" => "TheClient.com", "firm_id" => firm.id)
    client.save

    assert firm.clients.empty?, "New firm should have cached no client objects"
    assert !firm.has_clients?, "New firm should have cached a no-clients response"
    assert_equal 0, firm.clients.size, "New firm should have cached 0 clients count"

    assert !firm.clients(true).empty?, "New firm should have reloaded client objects"
    assert_equal 1, firm.clients(true).size, "New firm should have reloaded clients count"
  end

  def test_storing_in_pstore
    require "tmpdir"
    store_filename = File.join(Dir.tmpdir, "ar-pstore-association-test")
    File.delete(store_filename) if File.exists?(store_filename)
    require "pstore"
    apple = Firm.create("name" => "Apple")
    natural = Client.new("name" => "Natural Company")
    apple.clients << natural

    db = PStore.new(store_filename)
    db.transaction do
      db["apple"] = apple
    end

    db = PStore.new(store_filename)
    db.transaction do
      assert_equal "Natural Company", db["apple"].clients.first.name
    end
  end
end

class HasOneAssociationsTest < Test::Unit::TestCase
  fixtures :accounts, :companies, :developers, :projects, :developers_projects
  
  def test_has_one
    assert_equal companies(:first_firm).account, Account.find(1)
    assert_equal Account.find(1).credit_limit, companies(:first_firm).account.credit_limit
  end

  def test_triple_equality
    assert Account === companies(:first_firm).account
  end

  def test_type_mismatch
    assert_raises(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).account = 1 }
    assert_raises(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).account = Project.find(1) }
  end

  def test_natural_assignment
    apple = Firm.create("name" => "Apple")
    citibank = Account.create("credit_limit" => 10)
    apple.account = citibank
    assert_equal apple.id, citibank.firm_id
  end
  
  def test_natural_assignment_to_nil
    old_account_id = companies(:first_firm).account.id
    companies(:first_firm).account = nil
    companies(:first_firm).save
    assert_nil companies(:first_firm).account
    # account is dependent, therefore is destroyed when reference to owner is lost
    assert_raises(ActiveRecord::RecordNotFound) { Account.find(old_account_id) } 
  end
  
  def test_assignment_without_replacement
    apple = Firm.create("name" => "Apple")
    citibank = Account.create("credit_limit" => 10)
    apple.account = citibank
    assert_equal apple.id, citibank.firm_id
    
    hsbc = apple.build_account({ :credit_limit => 20}, false)
    assert_equal apple.id, hsbc.firm_id
    hsbc.save
    assert_equal apple.id, citibank.firm_id

    nykredit = apple.create_account({ :credit_limit => 30}, false)
    assert_equal apple.id, nykredit.firm_id
    assert_equal apple.id, citibank.firm_id
    assert_equal apple.id, hsbc.firm_id
  end

  def test_assignment_without_replacement_on_create
    apple = Firm.create("name" => "Apple")
    citibank = Account.create("credit_limit" => 10)
    apple.account = citibank
    assert_equal apple.id, citibank.firm_id
    
    hsbc = apple.create_account({:credit_limit => 10}, false)
    assert_equal apple.id, hsbc.firm_id
    hsbc.save
    assert_equal apple.id, citibank.firm_id
  end

  def test_dependence
    firm = Firm.find(1)
    assert !firm.account.nil?
    firm.destroy
    assert_equal 1, Account.count
  end

  def test_succesful_build_association
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save

    account = firm.build_account("credit_limit" => 1000)
    assert account.save
    assert_equal account, firm.account
  end

  def test_failing_build_association
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save

    account = firm.build_account
    assert !account.save
    assert_equal "can't be empty", account.errors.on("credit_limit")
  end

  def test_create_association
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save
    assert_equal firm.create_account("credit_limit" => 1000), firm.account
  end

  def test_build
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save

    firm.account = account = Account.new("credit_limit" => 1000)
    assert_equal account, firm.account
    assert account.save
    assert_equal account, firm.account
  end

  def test_build_before_child_saved
    firm = Firm.find(1)

    account = firm.account.build("credit_limit" => 1000)
    assert_equal account, firm.account
    assert account.new_record?
    assert firm.save
    assert_equal account, firm.account
    assert !account.new_record?
  end

  def test_build_before_either_saved
    firm = Firm.new("name" => "GlobalMegaCorp")

    firm.account = account = Account.new("credit_limit" => 1000)
    assert_equal account, firm.account
    assert account.new_record?
    assert firm.save
    assert_equal account, firm.account
    assert !account.new_record?
  end

  def test_failing_build_association
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save
    
    firm.account = account = Account.new
    assert_equal account, firm.account
    assert !account.save
    assert_equal account, firm.account
    assert_equal "can't be empty", account.errors.on("credit_limit")
  end

  def test_create
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save
    firm.account = account = Account.create("credit_limit" => 1000)
    assert_equal account, firm.account
  end

  def test_create_before_save
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.account = account = Account.create("credit_limit" => 1000)
    assert_equal account, firm.account
  end

  def test_dependence_with_missing_association
    Account.destroy_all
    firm = Firm.find(1)
    assert firm.account.nil?
    firm.destroy
  end

  def test_assignment_before_parent_saved
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.account = a = Account.find(1)
    assert firm.new_record?
    assert_equal a, firm.account
    assert firm.save
    assert_equal a, firm.account
    assert_equal a, firm.account(true)
  end

  def test_assignment_before_child_saved
    firm = Firm.find(1)
    firm.account = a = Account.new("credit_limit" => 1000)
    assert !a.new_record?
    assert_equal a, firm.account
    assert_equal a, firm.account
    assert_equal a, firm.account(true)
  end

  def test_assignment_before_either_saved
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.account = a = Account.new("credit_limit" => 1000)
    assert firm.new_record?
    assert a.new_record?
    assert_equal a, firm.account
    assert firm.save
    assert !firm.new_record?
    assert !a.new_record?
    assert_equal a, firm.account
    assert_equal a, firm.account(true)
  end
end


class HasManyAssociationsTest < Test::Unit::TestCase
  fixtures :accounts, :companies, :developers, :projects,
           :developers_projects, :topics

  def setup
    Client.destroyed_client_ids.clear
  end

  def force_signal37_to_load_all_clients_of_firm
    companies(:first_firm).clients_of_firm.each {|f| }
  end

  def test_counting
    assert_equal 2, Firm.find(:first).clients.count
  end
  
  def test_finding
    assert_equal 2, Firm.find(:first).clients.length
  end

  def test_finding_default_orders
    assert_equal "Summit", Firm.find(:first).clients.first.name
  end

  def test_finding_with_different_class_name_and_order
    assert_equal "Microsoft", Firm.find(:first).clients_sorted_desc.first.name
  end

  def test_finding_with_foreign_key
    assert_equal "Microsoft", Firm.find(:first).clients_of_firm.first.name
  end

  def test_finding_with_condition
    assert_equal "Microsoft", Firm.find(:first).clients_like_ms.first.name
  end

  def test_finding_using_sql
    firm = Firm.find(:first)
    first_client = firm.clients_using_sql.first
    assert_not_nil first_client
    assert_equal "Microsoft", first_client.name
    assert_equal 1, firm.clients_using_sql.size
    assert_equal 1, Firm.find(:first).clients_using_sql.size
  end

  def test_counting_using_sql
    assert_equal 1, Firm.find(:first).clients_using_counter_sql.size
    assert_equal 0, Firm.find(:first).clients_using_zero_counter_sql.size
  end

  def test_counting_non_existant_items_using_sql
    assert_equal 0, Firm.find(:first).no_clients_using_counter_sql.size
  end
  
  def test_belongs_to_sanity
    c = Client.new
    assert_nil c.firm

    if c.firm
      assert false, "belongs_to failed if check"
    end

    unless c.firm
    else
      assert false,  "belongs_to failed unless check"
    end
  end

  def test_find_ids
    firm = Firm.find(:first)

    assert_raises(ActiveRecord::RecordNotFound) { firm.clients.find }

    client = firm.clients.find(2)
    assert_kind_of Client, client

    client_ary = firm.clients.find([2])
    assert_kind_of Array, client_ary
    assert_equal client, client_ary.first

    client_ary = firm.clients.find(2, 3)
    assert_kind_of Array, client_ary
    assert_equal 2, client_ary.size
    assert_equal client, client_ary.first

    assert_raises(ActiveRecord::RecordNotFound) { firm.clients.find(2, 99) }
  end

  def test_find_all
    firm = Firm.find_first
    assert_equal firm.clients, firm.clients.find_all
    assert_equal 2, firm.clients.find(:all, :conditions => "type = 'Client'").length
    assert_equal 1, firm.clients.find(:all, :conditions => "name = 'Summit'").length
  end

  def test_find_all_sanitized
    firm = Firm.find_first
    assert_equal firm.clients.find_all("name = 'Summit'"), firm.clients.find_all(["name = '%s'", "Summit"])
    summit = firm.clients.find(:all, :conditions => "name = 'Summit'")
    assert_equal summit, firm.clients.find(:all, :conditions => ["name = ?", "Summit"])
    assert_equal summit, firm.clients.find(:all, :conditions => ["name = :name", { :name => "Summit" }])
  end

  def test_find_first
    firm = Firm.find_first
    client2 = Client.find(2)
    assert_equal firm.clients.first, firm.clients.find_first
    assert_equal client2, firm.clients.find_first("type = 'Client'")
    assert_equal client2, firm.clients.find(:first, :conditions => "type = 'Client'")
  end

  def test_find_first_sanitized
    firm = Firm.find_first
    client2 = Client.find(2)
    assert_equal client2, firm.clients.find_first(["type = ?", "Client"])
    assert_equal client2, firm.clients.find(:first, :conditions => ['type = ?', 'Client'])
    assert_equal client2, firm.clients.find(:first, :conditions => ['type = :type', { :type => 'Client' }])
  end

  def test_find_in_collection
    assert_equal Client.find(2).name, companies(:first_firm).clients.find(2).name
    assert_raises(ActiveRecord::RecordNotFound) { companies(:first_firm).clients.find(6) }
  end

  def test_adding
    force_signal37_to_load_all_clients_of_firm
    natural = Client.new("name" => "Natural Company")
    companies(:first_firm).clients_of_firm << natural
    assert_equal 2, companies(:first_firm).clients_of_firm.size # checking via the collection
    assert_equal 2, companies(:first_firm).clients_of_firm(true).size # checking using the db
    assert_equal natural, companies(:first_firm).clients_of_firm.last
  end
  
  def test_adding_a_mismatch_class
    assert_raises(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).clients_of_firm << nil }
    assert_raises(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).clients_of_firm << 1 }
    assert_raises(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).clients_of_firm << Topic.find(1) }
  end
  
  def test_adding_a_collection
    force_signal37_to_load_all_clients_of_firm
    companies(:first_firm).clients_of_firm.concat([Client.new("name" => "Natural Company"), Client.new("name" => "Apple")])
    assert_equal 3, companies(:first_firm).clients_of_firm.size
    assert_equal 3, companies(:first_firm).clients_of_firm(true).size
  end

  def test_adding_before_save
    no_of_firms = Firm.count
    no_of_clients = Client.count
    new_firm = Firm.new("name" => "A New Firm, Inc")
    new_firm.clients_of_firm.push Client.new("name" => "Natural Company")
    new_firm.clients_of_firm << (c = Client.new("name" => "Apple"))
    assert new_firm.new_record?
    assert c.new_record?
    assert_equal 2, new_firm.clients_of_firm.size
    assert_equal no_of_firms, Firm.count      # Firm was not saved to database.
    assert_equal no_of_clients, Client.count  # Clients were not saved to database.
    assert new_firm.save
    assert !new_firm.new_record?
    assert !c.new_record?
    assert_equal new_firm, c.firm
    assert_equal no_of_firms+1, Firm.count      # Firm was saved to database.
    assert_equal no_of_clients+2, Client.count  # Clients were saved to database.
    assert_equal 2, new_firm.clients_of_firm.size
    assert_equal 2, new_firm.clients_of_firm(true).size
  end

  def test_invalid_adding
    firm = Firm.find(1)
    assert !(firm.clients_of_firm << c = Client.new)
    assert c.new_record?
    assert !firm.save
    assert c.new_record?
  end

  def test_invalid_adding_before_save
    no_of_firms = Firm.count
    no_of_clients = Client.count
    new_firm = Firm.new("name" => "A New Firm, Inc")
    new_firm.clients_of_firm.concat([c = Client.new, Client.new("name" => "Apple")])
    assert c.new_record?
    assert !c.valid?
    assert new_firm.valid?
    assert !new_firm.save
    assert c.new_record?
    assert new_firm.new_record?
  end

  def test_build
    new_client = companies(:first_firm).clients_of_firm.build("name" => "Another Client")
    assert_equal "Another Client", new_client.name
    assert new_client.new_record?
    assert_equal new_client, companies(:first_firm).clients_of_firm.last
    assert companies(:first_firm).save
    assert !new_client.new_record?
    assert_equal 2, companies(:first_firm).clients_of_firm(true).size
  end

  def test_build_many
    new_clients = companies(:first_firm).clients_of_firm.build([{"name" => "Another Client"}, {"name" => "Another Client II"}])
    assert_equal 2, new_clients.size

    assert companies(:first_firm).save
    assert_equal 3, companies(:first_firm).clients_of_firm(true).size
  end

  def test_invalid_build
    new_client = companies(:first_firm).clients_of_firm.build
    assert new_client.new_record?
    assert !new_client.valid?
    assert_equal new_client, companies(:first_firm).clients_of_firm.last
    assert !companies(:first_firm).save
    assert new_client.new_record?
    assert_equal 1, companies(:first_firm).clients_of_firm(true).size
  end
  
  def test_create
    force_signal37_to_load_all_clients_of_firm
    new_client = companies(:first_firm).clients_of_firm.create("name" => "Another Client")
    assert !new_client.new_record?
    assert_equal new_client, companies(:first_firm).clients_of_firm.last
    assert_equal new_client, companies(:first_firm).clients_of_firm(true).last
  end
  
  def test_create_many
    companies(:first_firm).clients_of_firm.create([{"name" => "Another Client"}, {"name" => "Another Client II"}])
    assert_equal 3, companies(:first_firm).clients_of_firm(true).size
  end

  def test_deleting
    force_signal37_to_load_all_clients_of_firm
    companies(:first_firm).clients_of_firm.delete(companies(:first_firm).clients_of_firm.first)
    assert_equal 0, companies(:first_firm).clients_of_firm.size
    assert_equal 0, companies(:first_firm).clients_of_firm(true).size
  end

  def test_deleting_before_save
    new_firm = Firm.new("name" => "A New Firm, Inc.")
    new_client = new_firm.clients_of_firm.build("name" => "Another Client")
    assert_equal 1, new_firm.clients_of_firm.size
    new_firm.clients_of_firm.delete(new_client)
    assert_equal 0, new_firm.clients_of_firm.size
  end

  def test_deleting_a_collection
    force_signal37_to_load_all_clients_of_firm
    companies(:first_firm).clients_of_firm.create("name" => "Another Client")
    assert_equal 2, companies(:first_firm).clients_of_firm.size
    companies(:first_firm).clients_of_firm.delete([companies(:first_firm).clients_of_firm[0], companies(:first_firm).clients_of_firm[1]])
    assert_equal 0, companies(:first_firm).clients_of_firm.size
    assert_equal 0, companies(:first_firm).clients_of_firm(true).size
  end

  def test_clearing_an_association_collection
    firm = companies(:first_firm)
    client_id = firm.clients_of_firm.first.id
    assert_equal 1, firm.clients_of_firm.size

    firm.clients_of_firm.clear

    assert_equal 0, firm.clients_of_firm.size
    assert_equal 0, firm.clients_of_firm(true).size
    assert_equal [], Client.destroyed_client_ids[firm.id]

    # Should not be destroyed since the association is not dependent.
    assert_nothing_raised do
      assert Client.find(client_id).firm.nil?
    end
  end

  def test_clearing_a_dependent_association_collection
    firm = companies(:first_firm)
    client_id = firm.dependent_clients_of_firm.first.id
    assert_equal 1, firm.dependent_clients_of_firm.size

    # :dependent means destroy is called on each client
    firm.dependent_clients_of_firm.clear

    assert_equal 0, firm.dependent_clients_of_firm.size
    assert_equal 0, firm.dependent_clients_of_firm(true).size
    assert_equal [client_id], Client.destroyed_client_ids[firm.id]

    # Should be destroyed since the association is dependent.
    assert Client.find_by_id(client_id).nil?
  end

  def test_clearing_an_exclusively_dependent_association_collection
    firm = companies(:first_firm)
    client_id = firm.exclusively_dependent_clients_of_firm.first.id
    assert_equal 1, firm.exclusively_dependent_clients_of_firm.size

    # :exclusively_dependent means each client is deleted directly from
    # the database without looping through them calling destroy.
    firm.exclusively_dependent_clients_of_firm.clear

    assert_equal 0, firm.exclusively_dependent_clients_of_firm.size
    assert_equal 0, firm.exclusively_dependent_clients_of_firm(true).size
    assert_equal [], Client.destroyed_client_ids[firm.id]

    # Should be destroyed since the association is exclusively dependent.
    assert Client.find_by_id(client_id).nil?
  end

  def test_deleting_a_item_which_is_not_in_the_collection
    force_signal37_to_load_all_clients_of_firm
    summit = Client.find_first("name = 'Summit'")
    companies(:first_firm).clients_of_firm.delete(summit)
    assert_equal 1, companies(:first_firm).clients_of_firm.size
    assert_equal 1, companies(:first_firm).clients_of_firm(true).size
    assert_equal 2, summit.client_of
  end

  def test_deleting_type_mismatch
    david = Developer.find(1)
    david.projects.reload
    assert_raises(ActiveRecord::AssociationTypeMismatch) { david.projects.delete(1) }
  end

  def test_deleting_self_type_mismatch
    david = Developer.find(1)
    david.projects.reload
    assert_raises(ActiveRecord::AssociationTypeMismatch) { david.projects.delete(Project.find(1).developers) }
  end

  def test_destroy_all
    force_signal37_to_load_all_clients_of_firm
    assert !companies(:first_firm).clients_of_firm.empty?, "37signals has clients after load"
    companies(:first_firm).clients_of_firm.destroy_all
    assert companies(:first_firm).clients_of_firm.empty?, "37signals has no clients after destroy all"
    assert companies(:first_firm).clients_of_firm(true).empty?, "37signals has no clients after destroy all and refresh"
  end

  def test_dependence
    firm = companies(:first_firm)
    assert_equal 2, firm.clients.size
    firm.destroy
    assert Client.find(:all, :conditions => "firm_id=#{firm.id}").empty?
  end

  def test_destroy_dependent_when_deleted_from_association
    firm = Firm.find(:first)
    assert_equal 2, firm.clients.size

    client = firm.clients.first
    firm.clients.delete(client)

    assert_raise(ActiveRecord::RecordNotFound) { Client.find(client.id) }
    assert_raise(ActiveRecord::RecordNotFound) { firm.clients.find(client.id) }
    assert_equal 1, firm.clients.size
  end

  def test_three_levels_of_dependence
    topic = Topic.create "title" => "neat and simple"
    reply = topic.replies.create "title" => "neat and simple", "content" => "still digging it"
    silly_reply = reply.silly_replies.create "title" => "neat and simple", "content" => "ain't complaining"
    
    assert_nothing_raised { topic.destroy }
  end

  uses_transaction :test_dependence_with_transaction_support_on_failure
  def test_dependence_with_transaction_support_on_failure
    firm = companies(:first_firm)
    clients = firm.clients
    assert_equal 2, clients.length
    clients.last.instance_eval { def before_destroy() raise "Trigger rollback" end }

    firm.destroy rescue "do nothing"

    assert_equal 2, Client.find(:all, :conditions => "firm_id=#{firm.id}").size
  end

  def test_dependence_on_account
    assert_equal 2, Account.count
    companies(:first_firm).destroy
    assert_equal 1, Account.count
  end

  def test_included_in_collection
    assert companies(:first_firm).clients.include?(Client.find(2))
  end

  def test_adding_array_and_collection
    assert_nothing_raised { Firm.find(:first).clients + Firm.find(:all).last.clients }
  end

  def test_find_all_without_conditions
    firm = companies(:first_firm)
    assert_equal 2, firm.clients.find(:all).length
  end

  def test_replace_with_less
    firm = Firm.find(:first)
    firm.clients = [companies(:first_client)]
    assert firm.save, "Could not save firm"
    firm.reload
    assert_equal 1, firm.clients.length
  end
  
  def test_replace_with_new
    firm = Firm.find(:first)
    new_client = Client.new("name" => "New Client")
    firm.clients = [companies(:second_client),new_client]
    firm.save
    firm.reload
    assert_equal 2, firm.clients.length
    assert !firm.clients.include?(:first_client)
  end
  
  def test_replace_on_new_object
    firm = Firm.new("name" => "New Firm")
    firm.clients = [companies(:second_client), Client.new("name" => "New Client")]
    assert firm.save
    firm.reload
    assert_equal 2, firm.clients.length
    assert firm.clients.include?(Client.find_by_name("New Client"))
  end
  
  def test_assign_ids
    firm = Firm.new("name" => "Apple")
    firm.client_ids = [companies(:first_client).id, companies(:second_client).id]
    firm.save
    firm.reload
    assert_equal 2, firm.clients.length
    assert firm.clients.include?(companies(:second_client))
  end
end

class BelongsToAssociationsTest < Test::Unit::TestCase
  fixtures :accounts, :companies, :developers, :projects, :topics,
           :developers_projects
  
  def test_belongs_to
    Client.find(3).firm.name
    assert_equal companies(:first_firm).name, Client.find(3).firm.name
    assert !Client.find(3).firm.nil?, "Microsoft should have a firm"   
  end

  def test_type_mismatch
    assert_raise(ActiveRecord::AssociationTypeMismatch) { Account.find(1).firm = 1 }
    assert_raise(ActiveRecord::AssociationTypeMismatch) { Account.find(1).firm = Project.find(1) }
  end

  def test_natural_assignment
    apple = Firm.create("name" => "Apple")
    citibank = Account.create("credit_limit" => 10)
    citibank.firm = apple
    assert_equal apple.id, citibank.firm_id
  end
  
  def test_creating_the_belonging_object
    citibank = Account.create("credit_limit" => 10)
    apple    = citibank.create_firm("name" => "Apple")
    assert_equal apple, citibank.firm
    citibank.save
    citibank.reload
    assert_equal apple, citibank.firm
  end

  def test_building_the_belonging_object
    citibank = Account.create("credit_limit" => 10)
    apple    = citibank.build_firm("name" => "Apple")
    citibank.save
    assert_equal apple.id, citibank.firm_id
  end
  
  def test_natural_assignment_to_nil
    client = Client.find(3)
    client.firm = nil
    client.save
    assert_nil client.firm(true)
    assert_nil client.client_of
  end
  
  def test_with_different_class_name
    assert_equal Company.find(1).name, Company.find(3).firm_with_other_name.name
    assert_not_nil Company.find(3).firm_with_other_name, "Microsoft should have a firm"
  end

  def test_with_condition
    assert_equal Company.find(1).name, Company.find(3).firm_with_condition.name
    assert_not_nil Company.find(3).firm_with_condition, "Microsoft should have a firm"
  end
  
  def test_belongs_to_counter
    debate = Topic.create("title" => "debate")
    assert_equal 0, debate.send(:read_attribute, "replies_count"), "No replies yet"

    trash = debate.replies.create("title" => "blah!", "content" => "world around!")
    assert_equal 1, Topic.find(debate.id).send(:read_attribute, "replies_count"), "First reply created"

    trash.destroy
    assert_equal 0, Topic.find(debate.id).send(:read_attribute, "replies_count"), "First reply deleted"
  end

  def test_assignment_before_parent_saved
    client = Client.find(:first)
    apple = Firm.new("name" => "Apple")
    client.firm = apple
    assert_equal apple, client.firm
    assert apple.new_record?
    assert client.save
    assert apple.save
    assert !apple.new_record?
    assert_equal apple, client.firm
    assert_equal apple, client.firm(true)
  end

  def test_assignment_before_child_saved
    final_cut = Client.new("name" => "Final Cut")
    firm = Firm.find(1)
    final_cut.firm = firm
    assert final_cut.new_record?
    assert final_cut.save
    assert !final_cut.new_record?
    assert !firm.new_record?
    assert_equal firm, final_cut.firm
    assert_equal firm, final_cut.firm(true)
  end

  def test_assignment_before_either_saved
    final_cut = Client.new("name" => "Final Cut")
    apple = Firm.new("name" => "Apple")
    final_cut.firm = apple
    assert final_cut.new_record?
    assert apple.new_record?
    assert final_cut.save
    assert !final_cut.new_record?
    assert !apple.new_record?
    assert_equal apple, final_cut.firm
    assert_equal apple, final_cut.firm(true)
  end

  def test_new_record_with_foreign_key_but_no_object
    c = Client.new("firm_id" => 1)
    assert_equal Firm.find(:first), c.firm_with_basic_id
  end

  def test_forgetting_the_load_when_foreign_key_enters_late
    c = Client.new
    assert_nil c.firm_with_basic_id

    c.firm_id = 1
    assert_equal Firm.find(:first), c.firm_with_basic_id
  end

  def test_field_name_same_as_foreign_key
    computer = Computer.find 1
    assert_not_nil computer.developer, ":foreign key == attribute didn't lock up" # '
  end

  def xtest_counter_cache
    apple = Firm.create("name" => "Apple")
    final_cut = apple.clients.create("name" => "Final Cut")

    apple.clients.to_s
    assert_equal 1, apple.clients.size, "Created one client"
    
    apple.companies_count = 2
    apple.save

    apple = Firm.find(:first, :conditions => "name = 'Apple'")
    assert_equal 2, apple.clients.size, "Should use the new cached number"

    apple.clients.to_s 
    assert_equal 1, apple.clients.size, "Should not use the cached number, but go to the database"
  end

  def test_store_two_association_with_one_save
    num_orders = Order.count
    num_customers = Customer.count
    order = Order.new 

    customer1 = order.billing = Customer.new
    customer2 = order.shipping = Customer.new 
    assert order.save
    assert_equal customer1, order.billing
    assert_equal customer2, order.shipping

    order.reload

    assert_equal customer1, order.billing
    assert_equal customer2, order.shipping        

    assert_equal num_orders +1, Order.count
    assert_equal num_customers +2, Customer.count
  end

  
  def test_store_association_in_two_relations_with_one_save
    num_orders = Order.count
    num_customers = Customer.count
    order = Order.new 
    
    customer = order.billing = order.shipping = Customer.new 
    assert order.save
    assert_equal customer, order.billing
    assert_equal customer, order.shipping
    
    order.reload
    
    assert_equal customer, order.billing
    assert_equal customer, order.shipping        
    
    assert_equal num_orders +1, Order.count
    assert_equal num_customers +1, Customer.count
  end

  def test_store_association_in_two_relations_with_one_save_in_existing_object
    num_orders = Order.count
    num_customers = Customer.count
    order = Order.create
    
    customer = order.billing = order.shipping = Customer.new 
    assert order.save
    assert_equal customer, order.billing
    assert_equal customer, order.shipping
    
    order.reload
    
    assert_equal customer, order.billing
    assert_equal customer, order.shipping        
    
    assert_equal num_orders +1, Order.count
    assert_equal num_customers +1, Customer.count
  end
  
  def test_store_association_in_two_relations_with_one_save_in_existing_object_with_values
    num_orders = Order.count
    num_customers = Customer.count
    order = Order.create
    
    customer = order.billing = order.shipping = Customer.new 
    assert order.save
    assert_equal customer, order.billing
    assert_equal customer, order.shipping
    
    order.reload
    
    customer = order.billing = order.shipping = Customer.new 
    
    assert order.save
    order.reload    
    
    assert_equal customer, order.billing
    assert_equal customer, order.shipping        
    
    assert_equal num_orders +1, Order.count
    assert_equal num_customers +2, Customer.count
  end
  
  
  def test_association_assignment_sticks
    post = Post.find(:first)
    author1, author2 = Author.find(:all, :limit => 2)

    # make sure the association is loaded
    post.author

    # set the association by id, directly
    post.author_id = author2.id

    # save and reload
    post.save!
    post.reload

    # the author id of the post should be the id we set
    assert_equal post.author_id, author2.id
  end
  
end


class ProjectWithAfterCreateHook < ActiveRecord::Base
  set_table_name 'projects'
  has_and_belongs_to_many :developers,
    :class_name => "DeveloperForProjectWithAfterCreateHook",
    :join_table => "developers_projects",
    :foreign_key => "project_id",
    :association_foreign_key => "developer_id"

  after_create :add_david

  def add_david
    david = DeveloperForProjectWithAfterCreateHook.find_by_name('David')
    david.projects << self
  end
end

class DeveloperForProjectWithAfterCreateHook < ActiveRecord::Base
  set_table_name 'developers'
  has_and_belongs_to_many :projects,
    :class_name => "ProjectWithAfterCreateHook",
    :join_table => "developers_projects",
    :association_foreign_key => "project_id",
    :foreign_key => "developer_id"
end


class HasAndBelongsToManyAssociationsTest < Test::Unit::TestCase
  fixtures :accounts, :companies, :developers, :projects, :developers_projects
  
  def test_has_and_belongs_to_many
    david = Developer.find(1)

    assert !david.projects.empty?
    assert_equal 2, david.projects.size

    active_record = Project.find(1)
    assert !active_record.developers.empty?
    assert_equal 2, active_record.developers.size
    assert active_record.developers.include?(david)
  end

  def test_adding_single
    jamis = Developer.find(2)
    jamis.projects.reload # causing the collection to load 
    action_controller = Project.find(2)
    assert_equal 1, jamis.projects.size
    assert_equal 1, action_controller.developers.size    
    
    jamis.projects << action_controller

    assert_equal 2, jamis.projects.size
    assert_equal 2, jamis.projects(true).size
    assert_equal 2, action_controller.developers(true).size
  end

  def test_adding_type_mismatch
    jamis = Developer.find(2)
    assert_raise(ActiveRecord::AssociationTypeMismatch) { jamis.projects << nil }
    assert_raise(ActiveRecord::AssociationTypeMismatch) { jamis.projects << 1 }
  end

  def test_adding_from_the_project
    jamis = Developer.find(2)
    action_controller = Project.find(2)
    action_controller.developers.reload
    assert_equal 1, jamis.projects.size
    assert_equal 1, action_controller.developers.size

    action_controller.developers << jamis 
    
    assert_equal 2, jamis.projects(true).size
    assert_equal 2, action_controller.developers.size
    assert_equal 2, action_controller.developers(true).size
  end

  def test_adding_from_the_project_fixed_timestamp
    jamis = Developer.find(2)
    action_controller = Project.find(2)
    action_controller.developers.reload
    assert_equal 1, jamis.projects.size
    assert_equal 1, action_controller.developers.size
    updated_at = jamis.updated_at

    action_controller.developers << jamis

    assert_equal updated_at, jamis.updated_at
    assert_equal 2, jamis.projects(true).size
    assert_equal 2, action_controller.developers.size
    assert_equal 2, action_controller.developers(true).size
  end

  def test_adding_multiple
    aredridel = Developer.new("name" => "Aredridel")
    aredridel.save
    aredridel.projects.reload
    aredridel.projects.push(Project.find(1), Project.find(2))
    assert_equal 2, aredridel.projects.size
    assert_equal 2, aredridel.projects(true).size
  end

  def test_adding_a_collection
    aredridel = Developer.new("name" => "Aredridel")
    aredridel.save
    aredridel.projects.reload
    aredridel.projects.concat([Project.find(1), Project.find(2)])
    assert_equal 2, aredridel.projects.size
    assert_equal 2, aredridel.projects(true).size
  end

  def test_adding_uses_default_values_on_join_table
    ac = projects(:action_controller)
    assert !developers(:jamis).projects.include?(ac)
    developers(:jamis).projects << ac

    assert developers(:jamis, :reload).projects.include?(ac)
    project = developers(:jamis).projects.detect { |p| p == ac }
    assert_equal 1, project.access_level.to_i
  end

  def test_adding_uses_explicit_values_on_join_table
    ac = projects(:action_controller)
    assert !developers(:jamis).projects.include?(ac)
    developers(:jamis).projects.push_with_attributes(ac, :access_level => 3)

    assert developers(:jamis, :reload).projects.include?(ac)
    project = developers(:jamis).projects.detect { |p| p == ac }
    assert_equal 3, project.access_level.to_i
  end

  def test_habtm_adding_before_save
    no_of_devels = Developer.count
    no_of_projects = Project.count
    aredridel = Developer.new("name" => "Aredridel")
    aredridel.projects.concat([Project.find(1), p = Project.new("name" => "Projekt")])
    assert aredridel.new_record?
    assert p.new_record?
    assert aredridel.save
    assert !aredridel.new_record?
    assert_equal no_of_devels+1, Developer.count
    assert_equal no_of_projects+1, Project.count
    assert_equal 2, aredridel.projects.size
    assert_equal 2, aredridel.projects(true).size
  end

  def test_habtm_adding_before_save_with_join_attributes
    no_of_devels = Developer.count
    no_of_projects = Project.count
    now = Date.today
    sqlnow = Time.now.strftime("%Y/%m/%d 00:00:00")
    ken = Developer.new("name" => "Ken")
    ken.projects.push_with_attributes( Project.find(1), :joined_on => now )
    p = Project.new("name" => "Foomatic")
    ken.projects.push_with_attributes( p, :joined_on => now )
    assert ken.new_record?
    assert p.new_record?
    assert ken.save
    assert !ken.new_record?
    assert_equal no_of_devels+1, Developer.count
    assert_equal no_of_projects+1, Project.count
    assert_equal 2, ken.projects.size
    assert_equal 2, ken.projects(true).size

    kenReloaded = Developer.find_by_name 'Ken'
    # SQL Server doesn't have a separate column type just for dates, 
    # so the time is in the string and incorrectly formatted
    if ActiveRecord::ConnectionAdapters.const_defined? :SQLServerAdapter and ActiveRecord::Base.connection.instance_of?(ActiveRecord::ConnectionAdapters::SQLServerAdapter)
      kenReloaded.projects.each { |prj| assert_equal(sqlnow, prj.joined_on.strftime("%Y/%m/%d 00:00:00")) }
    else
      kenReloaded.projects.each { |prj| assert_equal(now.to_s, prj.joined_on.to_s) }
    end
  end

  def test_build
    devel = Developer.find(1)
    proj = devel.projects.build("name" => "Projekt")
    assert_equal devel.projects.last, proj
    assert proj.new_record?
    devel.save
    assert !proj.new_record?
    assert_equal devel.projects.last, proj
  end
  
  def test_create
    devel = Developer.find(1)
    proj = devel.projects.create("name" => "Projekt")
    assert_equal devel.projects.last, proj
    assert !proj.new_record?
  end
  
  def test_uniq_after_the_fact
    developers(:jamis).projects << projects(:active_record)
    developers(:jamis).projects << projects(:active_record)
    assert_equal 3, developers(:jamis).projects.size
    assert_equal 1, developers(:jamis).projects.uniq.size
  end

  def test_uniq_before_the_fact
    projects(:active_record).developers << developers(:jamis)
    projects(:active_record).developers << developers(:david)
    assert_equal 2, projects(:active_record, :reload).developers.size
  end
  
  def test_deleting
    david = Developer.find(1)
    active_record = Project.find(1)
    david.projects.reload
    assert_equal 2, david.projects.size
    assert_equal 2, active_record.developers.size

    david.projects.delete(active_record)
    
    assert_equal 1, david.projects.size
    assert_equal 1, david.projects(true).size
    assert_equal 1, active_record.developers(true).size
  end

  def test_deleting_array
    david = Developer.find(1)
    david.projects.reload
    david.projects.delete(Project.find(:all))
    assert_equal 0, david.projects.size
    assert_equal 0, david.projects(true).size
  end

  def test_deleting_with_sql
    david = Developer.find(1)
    active_record = Project.find(1)
    active_record.developers.reload
    assert_equal 2, active_record.developers_by_sql.size
    
    active_record.developers_by_sql.delete(david)
    assert_equal 1, active_record.developers_by_sql(true).size
  end

  def test_deleting_array_with_sql
    active_record = Project.find(1)
    active_record.developers.reload
    assert_equal 2, active_record.developers_by_sql.size
    
    active_record.developers_by_sql.delete(Developer.find(:all))
    assert_equal 0, active_record.developers_by_sql(true).size
  end

  def test_deleting_all
    david = Developer.find(1)
    david.projects.reload
    david.projects.clear
    assert_equal 0, david.projects.size
    assert_equal 0, david.projects(true).size
  end

  def test_removing_associations_on_destroy
    Developer.find(1).destroy
    assert Developer.connection.select_all("SELECT * FROM developers_projects WHERE developer_id = 1").empty?
  end
  
  def test_additional_columns_from_join_table
    # SQL Server doesn't have a separate column type just for dates, 
    # so the time is in the string and incorrectly formatted
    if ActiveRecord::ConnectionAdapters.const_defined? :SQLServerAdapter and ActiveRecord::Base.connection.instance_of?(ActiveRecord::ConnectionAdapters::SQLServerAdapter)
      assert_equal Time.mktime(2004, 10, 10).strftime("%Y/%m/%d 00:00:00"), Developer.find(1).projects.first.joined_on.strftime("%Y/%m/%d 00:00:00")
    else
      assert_equal Date.new(2004, 10, 10).to_s, Developer.find(1).projects.first.joined_on.to_s
    end
  end
  
  def test_destroy_all
    david = Developer.find(1)
    david.projects.reload
    assert !david.projects.empty?
    david.projects.destroy_all
    assert david.projects.empty?
    assert david.projects(true).empty?
  end

  def test_rich_association
    jamis = developers(:jamis)
    jamis.projects.push_with_attributes(projects(:action_controller), :joined_on => Date.today)
    # SQL Server doesn't have a separate column type just for dates, 
    # so the time is in the string and incorrectly formatted
    if ActiveRecord::ConnectionAdapters.const_defined? :SQLServerAdapter and ActiveRecord::Base.connection.instance_of?(ActiveRecord::ConnectionAdapters::SQLServerAdapter)
      assert_equal Time.now.strftime("%Y/%m/%d 00:00:00"), jamis.projects.select { |p| p.name == projects(:action_controller).name }.first.joined_on.strftime("%Y/%m/%d 00:00:00")
      assert_equal Time.now.strftime("%Y/%m/%d 00:00:00"), developers(:jamis).projects.select { |p| p.name == projects(:action_controller).name }.first.joined_on.strftime("%Y/%m/%d 00:00:00")
    else
      assert_equal Date.today.to_s, jamis.projects.select { |p| p.name == projects(:action_controller).name }.first.joined_on.to_s
      assert_equal Date.today.to_s, developers(:jamis).projects.select { |p| p.name == projects(:action_controller).name }.first.joined_on.to_s
    end
  end

  def test_associations_with_conditions
    assert_equal 2, projects(:active_record).developers.size
    assert_equal 1, projects(:active_record).developers_named_david.size

    assert_equal developers(:david), projects(:active_record).developers_named_david.find(developers(:david).id)
    assert_equal developers(:david), projects(:active_record).salaried_developers.find(developers(:david).id)

    projects(:active_record).developers_named_david.clear
    assert_equal 1, projects(:active_record, :reload).developers.size
  end
  
  def test_find_in_association
    # Using sql
    assert_equal developers(:david), projects(:active_record).developers.find(developers(:david).id), "SQL find"
    
    # Using ruby
    active_record = projects(:active_record)
    active_record.developers.reload
    assert_equal developers(:david), active_record.developers.find(developers(:david).id), "Ruby find"
  end

  def test_find_in_association_with_custom_finder_sql
    assert_equal developers(:david), projects(:active_record).developers_with_finder_sql.find(developers(:david).id), "SQL find"
   
    active_record = projects(:active_record)
    active_record.developers_with_finder_sql.reload
    assert_equal developers(:david), active_record.developers_with_finder_sql.find(developers(:david).id), "Ruby find"
  end

  def test_find_in_association_with_custom_finder_sql_and_string_id
    assert_equal developers(:david), projects(:active_record).developers_with_finder_sql.find(developers(:david).id.to_s), "SQL find"
  end


  def test_new_with_values_in_collection
    jamis = DeveloperForProjectWithAfterCreateHook.find_by_name('Jamis')
    david = DeveloperForProjectWithAfterCreateHook.find_by_name('David')
    project = ProjectWithAfterCreateHook.new(:name => "Cooking with Bertie")
    project.developers << jamis
    project.save!
    project.reload

    assert project.developers.include?(jamis)
    assert project.developers.include?(david)
  end

  def xtest_find_in_association_with_options
    developers = projects(:active_record).developers.find(:all)
    assert_equal 2, developers.size
    
    assert_equal developers(:david), projects(:active_record).developers.find(:first, :conditions => "salary < 10000")
    assert_equal developers(:jamis), projects(:active_record).developers.find(:first, :order => "salary DESC")
  end
  
  def test_replace_with_less
    david = developers(:david)
    david.projects = [projects(:action_controller)]
    assert david.save
    assert_equal 1, david.projects.length
  end

  def test_replace_with_new
    david = developers(:david)
    david.projects = [projects(:action_controller), Project.new("name" => "ActionWebSearch")]
    david.save
    assert_equal 2, david.projects.length
    assert !david.projects.include?(projects(:active_record))
  end
  
  def test_replace_on_new_object
    new_developer = Developer.new("name" => "Matz")
    new_developer.projects = [projects(:action_controller), Project.new("name" => "ActionWebSearch")]
    new_developer.save
    assert_equal 2, new_developer.projects.length
  end

  def test_consider_type
    developer = Developer.find(:first)
    special_project = SpecialProject.create("name" => "Special Project")
  
    other_project = developer.projects.first
    developer.special_projects << special_project
    developer.reload
  
    assert developer.projects.include?(special_project)
    assert developer.special_projects.include?(special_project)
    assert !developer.special_projects.include?(other_project)
  end

end