Re: Where Do You Put Your Error Checking Code?
On Friday 27 Jun 2008, Ian Rutherford wrote: So for the most part you would keep your business logic out of the database and take care of that in CFCS / cfm / ajax logic before hand? Yup, with the note that business rules should never be solely in the client, because the client can't be trusted. -- Tom Chiverton This email is sent for and on behalf of Halliwells LLP. Halliwells LLP is a limited liability partnership registered in England and Wales under registered number OC307980 whose registered office address is at Halliwells LLP, 3 Hardman Square, Spinningfields, Manchester, M3 3EB. A list of members is available for inspection at the registered office. Any reference to a partner in relation to Halliwells LLP means a member of Halliwells LLP. Regulated by The Solicitors Regulation Authority. CONFIDENTIALITY This email is intended only for the use of the addressee named above and may be confidential or legally privileged. If you are not the addressee you must not read it and must not use any information contained in nor copy it nor inform any person other than Halliwells LLP or the addressee of its existence or contents. If you have received this email in error please delete it and notify Halliwells LLP IT Department on 0870 365 2500. For more information about Halliwells LLP visit www.halliwells.com. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308667 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Where Do You Put Your Error Checking Code?
When you are writing your code, where do you handle error checking? Do you handle it with Javascript on the front end? With code before you hand the data to a CFC, in CFCs, in your T-SQL code? Or do you duplicate the error checking at each step along the way? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308254 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Where Do You Put Your Error Checking Code?
All of the above. The more user-friendly code and descriptions happen on the same page via js checks. The sql code typically throws a generic error. And the stuff in between is somewhere in the middle. On Fri, Jun 27, 2008 at 3:20 PM, Ian Rutherford [EMAIL PROTECTED] wrote: When you are writing your code, where do you handle error checking? Do you handle it with Javascript on the front end? With code before you hand the data to a CFC, in CFCs, in your T-SQL code? Or do you duplicate the error checking at each step along the way? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308255 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Where Do You Put Your Error Checking Code?
I personally never use js for validation; I always do it server side. I make sure the database has its own validation checking (using constraints, etc) and I also check the submitted data with ColdFusion before sending it to the database. Dominic 2008/6/27 Jerry Johnson [EMAIL PROTECTED]: All of the above. The more user-friendly code and descriptions happen on the same page via js checks. The sql code typically throws a generic error. And the stuff in between is somewhere in the middle. On Fri, Jun 27, 2008 at 3:20 PM, Ian Rutherford [EMAIL PROTECTED] wrote: When you are writing your code, where do you handle error checking? Do you handle it with Javascript on the front end? With code before you hand the data to a CFC, in CFCs, in your T-SQL code? Or do you duplicate the error checking at each step along the way? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308256 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Where Do You Put Your Error Checking Code?
Full validation is mandatory on the server-side. Client-side validation can smooth the user experience, but that's all it does. Your web layer should ensure everything is syntactically valid and do any necessary conversions. For example, if I submit a birth date via a form, the actual form parameter is a string, so it needs to be converted. That hands off to your business layer where semantic validation should happen (birth date is before death date, both are in the past, etc.). By the time you get to the data layer, almost no validation should be happening. The notable exception is stuff like uniqueness constraints and the like. Using JS for validation, especially combined with AJAX to do server-side processing, can yield a HUGE improvement in the appearance of your application. Things like checking if a username is unique before submitting the form, and telling the user right there if they need to pick a new one. Note that this uniqueness check does NOT count as validation, because the form is optional, only the POST is required. cheers, barneyb On Fri, Jun 27, 2008 at 12:20 PM, Ian Rutherford [EMAIL PROTECTED] wrote: When you are writing your code, where do you handle error checking? Do you handle it with Javascript on the front end? With code before you hand the data to a CFC, in CFCs, in your T-SQL code? Or do you duplicate the error checking at each step along the way? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308257 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Where Do You Put Your Error Checking Code?
I recently wrote some form validation. I the validation was done in CF but was done through an AJAX call when JS was available. I feel this is the best of both worlds. The end-user gets nice JS interaction when available and the validation is written only ONE time on the server-side where it can't be circumvented. Edward A Savage Jr - Sonny Senior Software Engineer Creditdiscovery, LLC An appeaser is one who feeds a crocodile, hoping it will eat him last. ~ Sir Winston Churchill On Fri, Jun 27, 2008 at 4:09 PM, Dominic Watson [EMAIL PROTECTED] wrote: I personally never use js for validation; I always do it server side. I make sure the database has its own validation checking (using constraints, etc) and I also check the submitted data with ColdFusion before sending it to the database. Dominic 2008/6/27 Jerry Johnson [EMAIL PROTECTED]: All of the above. The more user-friendly code and descriptions happen on the same page via js checks. The sql code typically throws a generic error. And the stuff in between is somewhere in the middle. On Fri, Jun 27, 2008 at 3:20 PM, Ian Rutherford [EMAIL PROTECTED] wrote: When you are writing your code, where do you handle error checking? Do you handle it with Javascript on the front end? With code before you hand the data to a CFC, in CFCs, in your T-SQL code? Or do you duplicate the error checking at each step along the way? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308258 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
RE: Where Do You Put Your Error Checking Code?
Only if you call that server-side validation a second time after the form is submitted to the server. ~Brad -Original Message- From: Sonny Savage [mailto:[EMAIL PROTECTED] I recently wrote some form validation. I the validation was done in CF but was done through an AJAX call when JS was available. I feel this is the best of both worlds. The end-user gets nice JS interaction when available and the validation is written only ONE time on the server-side where it can't be circumvented. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308259 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Where Do You Put Your Error Checking Code?
If the data is valid it is saved and the client is redirected. Without JS the form is submitted normally and goes through the same validation. Edward A Savage Jr - Sonny Senior Software Engineer Creditdiscovery, LLC An appeaser is one who feeds a crocodile, hoping it will eat him last. ~ Sir Winston Churchill On Fri, Jun 27, 2008 at 4:41 PM, Brad Wood [EMAIL PROTECTED] wrote: Only if you call that server-side validation a second time after the form is submitted to the server. ~Brad -Original Message- From: Sonny Savage [mailto:[EMAIL PROTECTED] I recently wrote some form validation. I the validation was done in CF but was done through an AJAX call when JS was available. I feel this is the best of both worlds. The end-user gets nice JS interaction when available and the validation is written only ONE time on the server-side where it can't be circumvented. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308260 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Where Do You Put Your Error Checking Code?
Ahh, I see. You are doing validation and processing with a single Ajax call on the server if JS is supported. That would work well. ~Brad -Original Message- From: Sonny Savage [mailto:[EMAIL PROTECTED] Sent: Friday, June 27, 2008 3:55 PM To: CF-Talk Subject: Re: Where Do You Put Your Error Checking Code? If the data is valid it is saved and the client is redirected. Without JS the form is submitted normally and goes through the same validation. Edward A Savage Jr - Sonny Senior Software Engineer Creditdiscovery, LLC An appeaser is one who feeds a crocodile, hoping it will eat him last. ~ Sir Winston Churchill On Fri, Jun 27, 2008 at 4:41 PM, Brad Wood [EMAIL PROTECTED] wrote: Only if you call that server-side validation a second time after the form is submitted to the server. ~Brad ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308262 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Where Do You Put Your Error Checking Code?
So for the most part you would keep your business logic out of the database and take care of that in CFCS / cfm / ajax logic before hand? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308265 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Where Do You Put Your Error Checking Code?
I am for keeping unnecessary business logic out of the database, but I am still a proponent of enforcing data types and foreign key constraints at the database level. ~Brad -Original Message- From: Ian Rutherford [mailto:[EMAIL PROTECTED] Sent: Friday, June 27, 2008 4:38 PM To: CF-Talk Subject: Re: Where Do You Put Your Error Checking Code? So for the most part you would keep your business logic out of the database and take care of that in CFCS / cfm / ajax logic before hand? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308266 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Where Do You Put Your Error Checking Code?
When you are writing your code, where do you handle error checking? Do you handle it with Javascript on the front end? With code before you hand the data to a CFC, in CFCs, in your T-SQL code? Or do you duplicate the error checking at each step along the way? Well, there's validation and then there's validation. Generally, I like to put simple validation tests (is this a number? is it a zip code? etc) both in my web application server layer and/or database and in my client logic as well. So, there's a certain amount of duplication there. Business logic, of course, must reside on the web application server at least, but invoking it via AJAX or Remoting lets you use the same logic in the client without duplication. I generally don't put business logic in the database, but I wouldn't go so far as to say you shouldn't do that. I've seen some very nice applications where the database does all of this stuff, and all you do from your web app is just call the appropriate stored procedure - no SQL is placed in the web app at all. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ Fig Leaf Software provides the highest caliber vendor-authorized instruction at our training centers in Washington DC, Atlanta, Chicago, Baltimore, Northern Virginia, or on-site at your location. Visit http://training.figleaf.com/ for more information! ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308267 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Where Do You Put Your Error Checking Code?
If you jump up a level, and then use code-generation, you can take care of a lot of various needs from one model. -- One model to rule them all, and in the darkness bind them. On Fri, Jun 27, 2008 at 3:38 PM, Ian Rutherford wrote: So for the most part you would keep your business logic out of the database and take care of that in CFCS / cfm / ajax logic before hand? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:308273 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
