Re: Object engineering #2 (Lew)
Message: 3 Date: Sat, 30 Jun 2007 23:58:39 -0400 From: Lew [EMAIL PROTECTED] Subject: RE: Object engineering #2 To: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii Depends on what you're taking. Ted's right about buffering and rollbacks, but I think you were referring to a different concept. Namely that the logic governing which tables to update and when doesn't belong in the user interface, it belongs in a business layer with actual storage issues governed by the data layer. I don't feel that this is an object engineering issue so much as a question of how strictly we layer our code and how much of the labor saving features .. in this case the ControlSource property... in VFP we're willing to give up to achieve the perfectly tiered and engineered app. -Lew You don't have to give up the ControlSource property. Binding to properties in the case of a form and to the cursor in the case of a grid sounds over-complicated to me. KISS. :) Just bind to the cursor all the time and have the form signal the business objects. Having the answer it depends for everything guarantees complexity. How do you plug in a toaster? It doesn't depend - that decision has been engineered out of the discussion. If you want to go solar or wind generated, you still feed the electricity into the house so you don't have to re-do all the wiring. :) ___ Post Messages to: ProFox@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
RE: Object engineering #2 (Lew)
Well, it might depend on whether or not you had electricity, or whether or not you were standing in water. The later answer would be you don't. But that would depend on whether you were attempting suicide or not, wouldn't it?G JH -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike yearwood Sent: Sunday, July 01, 2007 11:34 AM To: profox@leafe.com Subject: Re: Object engineering #2 (Lew) Message: 3 Date: Sat, 30 Jun 2007 23:58:39 -0400 From: Lew [EMAIL PROTECTED] Subject: RE: Object engineering #2 To: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii Depends on what you're taking. Ted's right about buffering and rollbacks, but I think you were referring to a different concept. Namely that the logic governing which tables to update and when doesn't belong in the user interface, it belongs in a business layer with actual storage issues governed by the data layer. I don't feel that this is an object engineering issue so much as a question of how strictly we layer our code and how much of the labor saving features .. in this case the ControlSource property... in VFP we're willing to give up to achieve the perfectly tiered and engineered app. -Lew You don't have to give up the ControlSource property. Binding to properties in the case of a form and to the cursor in the case of a grid sounds over-complicated to me. KISS. :) Just bind to the cursor all the time and have the form signal the business objects. Having the answer it depends for everything guarantees complexity. How do you plug in a toaster? It doesn't depend - that decision has been engineered out of the discussion. If you want to go solar or wind generated, you still feed the electricity into the house so you don't have to re-do all the wiring. :) [excessive quoting removed by server] ___ Post Messages to: ProFox@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED]@shelbynet.com ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
RE: Object engineering #2 (Lew)
I wasn't recommending that we give up using the controlsource property/feature. I'm just attracting attention to the fact that a direct reference to the data store subverts the intervention of governance by the business and data layers. I don't understand your second comment. Nothing needs to be rewired if it's done properly in the first place. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike yearwood Sent: Sunday, July 01, 2007 12:34 PM To: profox@leafe.com Subject: Re: Object engineering #2 (Lew) Message: 3 Date: Sat, 30 Jun 2007 23:58:39 -0400 From: Lew [EMAIL PROTECTED] Subject: RE: Object engineering #2 To: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii Depends on what you're taking. Ted's right about buffering and rollbacks, but I think you were referring to a different concept. Namely that the logic governing which tables to update and when doesn't belong in the user interface, it belongs in a business layer with actual storage issues governed by the data layer. I don't feel that this is an object engineering issue so much as a question of how strictly we layer our code and how much of the labor saving features .. in this case the ControlSource property... in VFP we're willing to give up to achieve the perfectly tiered and engineered app. -Lew You don't have to give up the ControlSource property. Binding to properties in the case of a form and to the cursor in the case of a grid sounds over-complicated to me. KISS. :) Just bind to the cursor all the time and have the form signal the business objects. Having the answer it depends for everything guarantees complexity. How do you plug in a toaster? It doesn't depend - that decision has been engineered out of the discussion. If you want to go solar or wind generated, you still feed the electricity into the house so you don't have to re-do all the wiring. :) [excessive quoting removed by server] ___ Post Messages to: ProFox@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
