{"id":322,"date":"2010-08-30T20:20:37","date_gmt":"2010-08-31T01:20:37","guid":{"rendered":"http:\/\/anvil-of-time.com\/wordpress\/?p=322"},"modified":"2021-03-09T08:11:38","modified_gmt":"2021-03-09T13:11:38","slug":"powerbuilder-gotcha-datawindow-datasource-values","status":"publish","type":"post","link":"https:\/\/anvil-of-time.com\/powerbuilder\/powerbuilder-gotcha-datawindow-datasource-values\/","title":{"rendered":"PowerBuilder ‘Gotcha’ – Datawindow datasource values"},"content":{"rendered":"

Let’s say you get a request to add some ‘audit’ capability to your application. By audit I mean there is a need to track changes made to various data elements on a record when they are saved back to the database. This can be done any number of ways but you want to make use of the datawindow ‘datasource’ property via dot notation.<\/p>\n

ls_orig = dw_items.object.itemDesc.original[ll_row] \/\/ values retrieved from database\nls_new = dw_items.object.itemDesc[ll_row] \/\/ current values<\/pre>\n
Now if the values differ you do whatever you need to do.<\/p>\n
You test your code on a few columns in the datawindow, things look good, you check it in, it goes to QA and TA DA – rejected.<\/p>\n
The auditor states that some of the changed columns were changed but your audit list\/report incorrectly lists them.
\nExample shows:  Original Value: Blue Widget\t\tNew Value: Blue Widget
\nThe data is correct in the application.  The auditor changed the value from Blue Widget to Red Widget.<\/p>\n
The problem is the item description field on your datawindow object is populated from a dropdown datawindow.  To get the proper value you need to:<\/p>\n
ls_describe = "Evaluate('LookUpDisplay(partId)', " + string(ll_row) + ")"\nls_new = dw_items.Describe(ls_describe)<\/pre>\n","protected":false},"excerpt":{"rendered":"
Let’s say you get a request to add some ‘audit’ capability to your application. By audit I mean there is a need to track changes made to various data elements on a record when they are saved back to the database. This can be done any number of ways but you want to make use…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[21,12],"_links":{"self":[{"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/posts\/322"}],"collection":[{"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/comments?post=322"}],"version-history":[{"count":7,"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/posts\/322\/revisions"}],"predecessor-version":[{"id":1805,"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/posts\/322\/revisions\/1805"}],"wp:attachment":[{"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/media?parent=322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/categories?post=322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/anvil-of-time.com\/wp-json\/wp\/v2\/tags?post=322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}