Hi all, I've the following test method in my controller_test which increment the 'qty' attribute in a has_many association, 'sa_report_products'. The 'item_count' method returns the sum of all qty's in 'sa_report_products': def test_add_product_to_report sa_rpt = SaReport.find(1) assert_equal 3, c = sa_rpt.item_count, 'initial count is 3' assert_equal 2, sa_rpt.sa_report_products.qty, 'initial qty is 2' post :add_item, :id => sa_rpt.id, :new_product_item_id => 1, :new_product_item_qty => 3 sa_rpt.reload # MUST HAVE THIS TO WORK, WHY?? assert_equal 2, sa_rpt.sa_report_products.length, 'still have 2 item lines' assert_equal 5, sa_rpt.sa_report_products.qty, '3 added' sa_rpt.update assert_equal c + 3, sa_rpt.item_count, '3 added' end end The test failed if I leave out the "sa_rpt.reload" line, that is "sa_rpt.sa_report_products.qty" is still 2, not 5. My problem is I don't really understand when I needed to reload an ActiveRecord, can somebody explain? Thank Jack Hung
on 2006-01-10 12:24
on 2006-01-10 13:22
You generally use the Reload method in your test harnesses. You have set sa_rpt to the item with id=1. After the post, the data inside the database has changed wrt to id=1. sa_rpt does not re-populate itself automatically if the database changes, so you need to do a Reload to get the latest data from the database if you want to make use of the new data - which you are because you want to run tests against this data.