Re: Problems when user hit back
This WebDNA talk-list message is from 2000
It keeps the original formatting.
numero = 34482
interpreted = N
texte = >The only way to safely deal with it is to design your site so that the >user never wants to use the Back button. ;~( The issue is that when the >user goes back, the browser resubmits the command to add the last line >item. > >If you can guarantee that there will never be more than one line with >a given SKU, you can write a small loop to check for duplicates and >forbid the subsequent adds. This really only works well if you are >using contexts to add to the cart, instead of commands. I deal with it by adding a rn=[random] to all of my links. On the shopping cart page I set a header to the rn value the first time through. Then on subsequent hits to that page I check to see if rn equals my header value if so then the user either hit reload or back so I don't add the item to the cart again. For every hit to the cart page that has a unique rn value I set my header to that value to check on the next hit.-- Sam LewisSamLewis.com Tel: 626-852-0956 Fax: 916-404-5698------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
. To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
Associated Messages, from the most recent to the oldest:
>The only way to safely deal with it is to design your site so that the >user never wants to use the Back button. ;~( The issue is that when the >user goes back, the browser resubmits the command to add the last line >item. > >If you can guarantee that there will never be more than one line with >a given SKU, you can write a small loop to check for duplicates and >forbid the subsequent adds. This really only works well if you are >using contexts to add to the cart, instead of commands. I deal with it by adding a rn=[random] to all of my links. On the shopping cart page I set a header to the rn value the first time through. Then on subsequent hits to that page I check to see if rn equals my header value if so then the user either hit reload or back so I don't add the item to the cart again. For every hit to the cart page that has a unique rn value I set my header to that value to check on the next hit.-- Sam LewisSamLewis.com Tel: 626-852-0956 Fax: 916-404-5698------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
Sam Lewis
DOWNLOAD WEBDNA NOW!
Top Articles:
Talk List
The WebDNA community talk-list is the best place to get some help: several hundred extremely proficient programmers with an excellent knowledge of WebDNA and an excellent spirit will deliver all the tips and tricks you can imagine...
Related Readings:
Firesite cache vs webcat cache (1997)
Taxes rates based on item and State (1998)
BBEdit WedDNA Codeless Language Module (2004)
[protect admin] (1997)
New Command prefs ... (1997)
question: writing files textb in webmerch (1997)
Questions (1998)
For those of you not on the WebCatalog Beta... (1997)
WebMerchant and CyberCash Problem: repost (2000)
international time (1997)
Missing from Docs [folderName] (1997)
WC2f3 (1997)
Mass download. (2003)
Setting up a lightbox (2002)
Single Link browsing (1997)
WebCat for paper collection, review and coordination ? (1998)
Secure server question (1997)
Next X hits (1996)
MacAuthorize order data fields WAS:How To question... (1997)
remotely add + sign (1997)