[checkout] make custom fields available during checkout
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wildguy
Joined: 2007-09-04
Posts: 42 |
Posted: Fri, 2009-03-06 22:04
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I use customfields to apply dynamic backgounds to photo thumbnails. Is there a way to load custom field data into a template variable for use during checkout? I have been able to add a whole block for each item in the cart by adding this line to SessionContents template.... {g->block type=customfield.CustomFields item=$tpl.items[$item.id]} What I want, however, is to return a specific value from a particular field, instead of the entire block. i.e why doesn't this.... {$block.customfield.LoadCustomFields.fields.CustomThumbBg} work?
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Posts: 4342
Sure, it's quite straightforward.
Add a new module (which is as simple as 11 lines of code in a file called module.inc in its own folder) which has a callbacks.inc file. In the template where you want to load new variables make a call to your callback function. The callback function has to follow the right variable structure, of course, but that's just a matter of following examples.
If you want to be really neat you don't even need to modify templates: create your own block in your new module - the block has a template file which calls your callback function etc. etc.
Alternatively instead of writing a new little module you can hack the customfields module to do the same, if you want, but it's not as tidy.
There's nothing checkout-specific about this; checkout uses the same technique to display item prices - it has a block with a template, and the template calls a callback in the checkout module's callbacks.inc to fetch the prices for the item on display, then the template can display them.
Er... dunno. But have you actually loaded the variable anywhere, before you try to use it? Like in a callback function?
Posts: 42
Yes, sorry I didn't mention it. I originally tried the following within the foreach loop:
{g->callback type="customfield.LoadCustomFields" itemId=$tpl.items[$item.id]}
or
{g->callback type="customfield.LoadCustomFields" itemId=$theme.item.id}
However no data was returned this way, and I imagine that isn't ideal to place a callback in the loop.
I will try to make a simple module as you suggest. Thanks.
Posts: 4342
If the data you want is (or ought to be) fetched by an existing callback, then I wouldn't bother with creating your own module; use the callback that's there.
Debug the callback with the usual technique of inserting echo() statements into the callback code to see what's happening.
I find inserting this to be helpful:
echo ('<pre>'); print_r($variableToDebug); echo('</pre>');If you run in debug 'buffered' you also get a pop-up window with all the Smarty variables, which should include $block, so you can see what's in that.
Posts: 4342
Also I've just seen this post by the God Floridave in another thread, which might be helpful:
http://gallery.menalto.com/node/85470#comment-299820
Posts: 42
Thanks for your help, I am on the right track now.