Skip to main content

Doh! - figure out return values before coding for them

Many developers will tell you "Development is full of "aha" moments" - those moments when something clicks and everything falls into place. What they don't tell you is that there are also a few "doh" moments - moments where you see code (usually your old code from years back) and instantly see why it wasn't doing what it should have been doing in the first place.

So here's a recent "doh" moment in VFP.

I'm tracking some strange behavior issues in some CursorAdapter code and figure I can use the AfterRecordRefresh event to see if I did get a refresh or not.

I have a lot of my code wrapped in a TRY CATCH LOOP but I had a little piece of code outside of it that I wanted to trap why a record was not refreshed.

The AfterRecordRefresh event gets three parameters:
nRecords - The number of records to refresh (passed to the recordrefresh method)
nRecordOffset - The record offset passed
nRefreshed - the return value from the RecordRefresh method

So the code was...

IF nRefreshed = 0
    ** Log this so we can see why no records were refreshed
ENDIF

Anyone catch the "doh"?

(for one, the documentation is this case is incredibly convoluted to follow. The AfterRecordRefresh method gives you some basic description but essentially says "See RecordRefresh" - once a doc goes into "see this" mode, it can often get overlooked.)

If you refreshed one record, nRefreshed would be 1, right?
If it didn't succeed, it would be .....

The "doh" is that RecordRefresh returns zero if there were no records were refreshed and there were no errors. If there were errors, it returns -1. Now, that's what I wanted to track down with.

So the code was recording any time an update was done, even when there were no changes.

Who reads the docs anyways, right? RTFM!

Comments

Popular posts from this blog

Attending Southwest Fox 2019 could change your life - Find out how

Southwest Fox is coming up in October and as I do every year, I spoke with the organizers Rick , Doug and Tamar on the FoxShow. Deadlines for Southwest Fox: Super-saver price (before July 1): $695 Early-bird price (before August 1): $770 Regular price (August 1 and later): $820 This year, I took a different approach with separate shows for each organizer but the main message is still the same : July 1st is their Go/No-Go date. Conferences don't talk about this very often. I don't think developers really question if Apple will hold their WWDC in June or Microsoft will hold their Build conference - but that's because those conferences are vendor-led. Southwest Fox is a community-driven conference - it's not driven by a company with an agenda. Listen to the interviews and you can hear how important each of the organizers feel the live connection between speakers and among attendees.

Well, that explains CodePlex...

In a move that will be sure to anger open source (or rather anti-paid software, anti-Microsoft open source)  zealots, Microsoft is planning to buy GitHub . A year ago, I mused about why Microsoft would shut down CodePlex and how the world needs competing source code repositories to be strong. I'm not the only one per this Slashdot article  : "...   people have warned about GitHub becoming as large as it did as problematic because it concentrates too much of the power to make or break the open source world in a single entity, moreso because there were valid questions about GitHubs financial viability...." - Jacques Mattheij I will be interested in seeing this play out - whether developers jump ship or not. Have all the efforts Microsoft has made in pushing towards open source be seen as genuine or will all the zealots jump ship or maybe even attack? Microsoft's comment about why they shut down CodePlex referred to how spammers were using CodePlex. Well, GitHub

FoxInCloud Stats

FoxInCloud sent this link a while back about their statistics regarding visits to their site: http://foxincloud.com/blog/2017/12/27/VFP-community-lessons-from-foxincloud-site.html What's interesting here is the breakdown of people. Yes, I think it's understandable that the Fox community is getting older. Another factor is the growth of the mobile and web environments taking over development. These environments really do push people towards the newer non-SQL or free SQL/hosted environments but more towards hosted storage options like Amazon and Google. A tool like FoxInCloud that helps MOVE existing applications to the cloud inherently competes with those environments. But FoxInCloud also allows developers to extend their application further by giving them a starting point using Javascript and the basic CSS (such as Bootstrap). If you're not rebuilding your application from scratch, it's certainly a great step forward. FoxPro VFP