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require "cases/helper"
require 'models/post'
require 'models/person'
require 'models/reader'
class HasManyThroughAssociationsTest < ActiveRecord::TestCase
fixtures :posts, :readers, :people
def test_associate_existing
assert_queries(2) { posts(:thinking);people(:david) }
assert_queries(1) do
posts(:thinking).people << people(:david)
end
assert_queries(1) do
assert posts(:thinking).people.include?(people(:david))
end
assert posts(:thinking).reload.people(true).include?(people(:david))
end
def test_associating_new
assert_queries(1) { posts(:thinking) }
new_person = nil # so block binding catches it
assert_queries(0) do
new_person = Person.new :first_name => 'bob'
end
# Associating new records always saves them
# Thus, 1 query for the new person record, 1 query for the new join table record
assert_queries(2) do
posts(:thinking).people << new_person
end
assert_queries(1) do
assert posts(:thinking).people.include?(new_person)
end
assert posts(:thinking).reload.people(true).include?(new_person)
end
def test_associate_new_by_building
assert_queries(1) { posts(:thinking) }
assert_queries(0) do
posts(:thinking).people.build(:first_name=>"Bob")
posts(:thinking).people.new(:first_name=>"Ted")
end
# Should only need to load the association once
assert_queries(1) do
assert posts(:thinking).people.collect(&:first_name).include?("Bob")
assert posts(:thinking).people.collect(&:first_name).include?("Ted")
end
# 2 queries for each new record (1 to save the record itself, 1 for the join model)
# * 2 new records = 4
# + 1 query to save the actual post = 5
assert_queries(5) do
posts(:thinking).body += '-changed'
posts(:thinking).save
end
assert posts(:thinking).reload.people(true).collect(&:first_name).include?("Bob")
assert posts(:thinking).reload.people(true).collect(&:first_name).include?("Ted")
end
def test_delete_association
assert_queries(2){posts(:welcome);people(:michael); }
assert_queries(1) do
posts(:welcome).people.delete(people(:michael))
end
assert_queries(1) do
assert posts(:welcome).people.empty?
end
assert posts(:welcome).reload.people(true).empty?
end
def test_replace_association
assert_queries(4){posts(:welcome);people(:david);people(:michael); posts(:welcome).people(true)}
# 1 query to delete the existing reader (michael)
# 1 query to associate the new reader (david)
assert_queries(2) do
posts(:welcome).people = [people(:david)]
end
assert_queries(0){
assert posts(:welcome).people.include?(people(:david))
assert !posts(:welcome).people.include?(people(:michael))
}
assert posts(:welcome).reload.people(true).include?(people(:david))
assert !posts(:welcome).reload.people(true).include?(people(:michael))
end
def test_associate_with_create
assert_queries(1) { posts(:thinking) }
# 1 query for the new record, 1 for the join table record
# No need to update the actual collection yet!
assert_queries(2) do
posts(:thinking).people.create(:first_name=>"Jeb")
end
# *Now* we actually need the collection so it's loaded
assert_queries(1) do
assert posts(:thinking).people.collect(&:first_name).include?("Jeb")
end
assert posts(:thinking).reload.people(true).collect(&:first_name).include?("Jeb")
end
def test_associate_with_create_and_no_options
peeps = posts(:thinking).people.count
posts(:thinking).people.create(:first_name => 'foo')
assert_equal peeps + 1, posts(:thinking).people.count
end
def test_associate_with_create_exclamation_and_no_options
peeps = posts(:thinking).people.count
posts(:thinking).people.create!(:first_name => 'foo')
assert_equal peeps + 1, posts(:thinking).people.count
end
def test_clear_associations
assert_queries(2) { posts(:welcome);posts(:welcome).people(true) }
assert_queries(1) do
posts(:welcome).people.clear
end
assert_queries(0) do
assert posts(:welcome).people.empty?
end
assert posts(:welcome).reload.people(true).empty?
end
def test_association_callback_ordering
Post.reset_log
log = Post.log
post = posts(:thinking)
post.people_with_callbacks << people(:michael)
assert_equal [
[:added, :before, "Michael"],
[:added, :after, "Michael"]
], log.last(2)
post.people_with_callbacks.push(people(:david), Person.create!(:first_name => "Bob"), Person.new(:first_name => "Lary"))
assert_equal [
[:added, :before, "David"],
[:added, :after, "David"],
[:added, :before, "Bob"],
[:added, :after, "Bob"],
[:added, :before, "Lary"],
[:added, :after, "Lary"]
],log.last(6)
post.people_with_callbacks.build(:first_name => "Ted")
assert_equal [
[:added, :before, "Ted"],
[:added, :after, "Ted"]
], log.last(2)
post.people_with_callbacks.create(:first_name => "Sam")
assert_equal [
[:added, :before, "Sam"],
[:added, :after, "Sam"]
], log.last(2)
post.people_with_callbacks = [people(:michael),people(:david), Person.new(:first_name => "Julian"), Person.create!(:first_name => "Roger")]
assert_equal (%w(Ted Bob Sam Lary) * 2).sort, log[-12..-5].collect(&:last).sort
assert_equal [
[:added, :before, "Julian"],
[:added, :after, "Julian"],
[:added, :before, "Roger"],
[:added, :after, "Roger"]
], log.last(4)
post.people_with_callbacks.clear
assert_equal (%w(Michael David Julian Roger) * 2).sort, log.last(8).collect(&:last).sort
end
end
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