Stephen Moss

I’m having issues trying to get the Depot Application (Task T) unit testing runnning using Eclipse Galileo / JRuby 1.2.0.9419p2 / Apache Derby 10.1.3.1

I’ve used the rake commands to create the depot test database and verified that the schema and tables exist. When trying to run the following test:

test "invalid_with_empty_attributes" do
  assert true
  #product = Product.new
  #assert !product.valid?
  #assert product.errors.invalid?(:title)
  #assert product.errors.invalid?(:description)
  #assert product.errors.invalid?(:price)
  #assert product.errors.invalid?(:image_url)
end

NOTE: I’ve commented out the assert statements to keep the test simple

I get the following error:

Exception: ActiveRecord::ActiveRecordError: Syntax error: Encountered “RESTART” at line 1, column 40.: ALTER TABLE line_items ALTER COLUMN id RESTART WITH 2053932786

Can anyone help?

Figured it out. The Apache Derby version being used (10.1.3.1) was an older version that didn’t accept the ALTER COLUMN id RESTART syntax…

Tricky bit was I needed to overwrite the Derby jar files in the Aptana directories as these took predecence over the eclipse/plugins directory version of Derby I installed (10.6).

I’ve managed to get the Chat application in Java up and running. One thing I’m struggling to get up and running is the concept of authenticating a user using GWT/Java, i.e. detecting if someone is logged in and re-directing them to the login URL if they aren’t before posting a message. Also, how is a “Login” type function implemented on the HTML page?

At the moment I’m using a hack in the postMessage server method to set the user name to “Guest” if the user isn’t logged in. Is this something that you will be covering in a later version of the book, or is there some advice on how to get this to work?