Sample TAPI Apex Application

If you attended my presentation at AUSOUG Perth earlier this month, or if you’ve had a peek at the slides, you may be interested in a more concrete demonstration of the ideas presented. So if you’d like to install and play with a sample application that includes a TAPI generator, feel free to download this.

Disclaimer: this is provided for information (and entertainment) purposes only.

Prerequisites:
Oracle Application Express 4.2.2 or later

Installation (more...)

Help for your keyboard users

Apex’s Blue Responsive Theme 25 is a great theme for building a user-friendly website, and unlike many other themes which make the item labels clickable to get help, it renders little question-mark icons to the right of each item that has a help message defined.

theme-25-help-icon

One issue with this design, however, is that a keyboard-savvy user (such as myself) hates to switch between keyboard and mouse – so they Tab between each field as they fill (more...)

AUSOUG Conference Perth, November 2014

What a great conference – there’s been a lot of praise for the organisers and all the speakers. I haven’t missed a conference since I started 15 years ago, and I hope it keeps going (in one form or another) for a long time to come.

This year I attended the following sessions (some titles changed for effect):

Björn Rost – 12c for DBAs and Developers; FDA (time to drop those journal triggers)

Scott Wesley – CSS & (more...)

Next/Previous buttons from Interactive Report results

What could be simpler than a set of "Next" and "Previous" buttons?

What could be simpler than a set of “Next” and “Previous” buttons?

I love Interactive Reports, they make it easy to deliver a lot of power to users for very little development effort. However, with that power comes some complexity for building certain features not available in the base Apex toolset.

I had an IR with a fairly costly and complex query behind it, linked to another screen to view the details for a record. The (more...)

Code can be scary when you simplify it

Disclaimer: I’m not posting to make me look better, we’ve all written code that we’re later ashamed of, and I’m no different!

This is some code from a system I was maintaining some time ago. I’ve kept it since then because it illustrates a number of things NOT to do:

FUNCTION password_is_valid
  (in_password IN VARCHAR2)
-- do NOT copy this code!!! ...
  RETURN VARCHAR2 IS
  l_valid VARCHAR2(1);
  l_sql VARCHAR2(32000);
  CURSOR cur_rules IS
    SELECT REPLACE(sql_expression
                  ,'#PASSWORD#'
                  ,''''  (more...)

Submit from jQuery modal causing session state protection violation

Don’t you hate those nagging issues where you attempt a few fixes in vain, waste hours of your life, and then suddenly the issue just resolves itself? What’s worse than an issue that won’t go away is one that just resolves itself and you don’t know why. You don’t know if it is just hiding, waiting to reappear at some inconvenient time later (e.g. when the app goes live in Production).

I added the (more...)

AUSOUG 2014 Perth Conference

It’s that wonderful time of year again – no, not talking about springtime, when I’m stalked by airborne grass pollens causing me to choke and gag all day. The sound of a lawnmower is enough to elicit a sneezing fit – and in Aussie springtime, that’s most weekends. (I’m so glad my wife does the mowing at our place, usually while I’m at work. My son is now old enough to do the mowing – (more...)

Show an animated “Please wait” indicator after page submit

My application normally responds to button clicks with sub-second performance, but there were a few operations where users can initiate quite long-running transactions (e.g. up to 15 seconds long in one case where it was hitting an eBus interface thousands of times).

When the user clicks the button, I want the page to show a “Please Wait” message with an animated running indicator (I won’t call it a “progress bar” even though it looks (more...)

Split CLOB into lines

Simple requirement – I’ve got a CLOB (e.g. after exporting an application from Apex from the command line) that I want to examine, and I’m running my script on my local client so I can’t use UTL_FILE to write it to a file. I just want to spit it out to DBMS_OUTPUT.

Strangely enough I couldn’t find a suitable working example on the web for how to do this, so wrote my own version. (more...)

Add a Dynamic Total to a Tabular Report

I have a Tabular Report with an editable Amount item. When the page loads, the total amount should be shown below the report; and if the user updates any amount on any row, the total amount should be updated automatically.

Note: this method does not work if you have a tabular report that might have a very large number of records (as it relies on all records being rendered in the page at one time).

(more...)