Hello,
I am exploring the “Testing” part of Rails, but It seems some things
work differently than I thought it would.
Consider the following model:
class Client < ActiveRecord::Base
has_one :project
def after_create
Project.new(:name => self.name, :is_client => true, :client_id
=> self.id).save
end
def after_update
self.project.update_attributes(:name => self.name, :disabled =>
self.disabled)
end
def before_destroy
self.project.destroy
end
end
and the following test:
require File.dirname(FILE) + ‘/…/test_helper’
class ClientTest < Test::Unit::TestCase
fixtures :clients
def setup
@client = Client.find(1)
end
def test_create
assert_kind_of Client, @client
assert_equal 1, @client.id
assert_equal clients(:elasto_client).name, @client.name
end
def test_update
assert_equal clients(:elasto_client).description,
@client.description
@client.description = “TEST UPDATE DESCRIPTION”
assert @client.save, @client.errors.full_messages.join("; ")
@client.reload
assert_equal “TEST UPDATE DESCRIPTION”, @client.description
end
def test_destroy
@client.destroy
assert_raise(ActiveRecord::RecordNotFound) {
Client.find(@client.id) }
end
end
larik@somehost $ ruby test/unit/client_test.rb
Loaded suite test/unit/client_test
Started
.EE
Finished in 0.577375 seconds.
-
Error:
test_destroy(ClientTest):
NoMethodError: You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occured while evaluating nil.destroy
/Users/larik/cvs/correlator/app/models/client.rb:46:in
before_destroy' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:348:insend’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:348:in
callback' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:320:indestroy_without_transactions’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:122:in
destroy' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:122:intransaction’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:91:in
transaction' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:118:intransaction’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:122:in
destroy' test/unit/client_test.rb:25:intest_destroy’ -
Error:
test_update(ClientTest):
NoMethodError: You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occured while evaluating nil.update_attributes
/Users/larik/cvs/correlator/app/models/client.rb:42:in
after_update' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:348:insend’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:348:in
callback' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:275:inupdate_without_timestamps’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/timestamp.rb:39:in
update' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/base.rb:1431:increate_or_update_without_callbacks’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/callbacks.rb:249:in
create_or_update' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/base.rb:1226:insave_without_validation’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/validations.rb:698:in
save_without_transactions' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:126:insave’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:126:in
transaction' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:91:intransaction’
/usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:118:in
transaction' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/transactions.rb:126:insave’
test/unit/client_test.rb:19:in `test_update’
3 tests, 4 assertions, 0 failures, 2 errors
It seems like the data for the clients is directly loaded from the
fixtures files, it doesn’t respect the callbacks defined in the model.
E.g. creating of the Project data.
My question is, what is the best way of getting “proper” data in the
database, with respect to the fixtures data and the callbacks defined
in the model.
–
Sincerely,
Frodo L.