I believe you need the following ( the following is psuedo code):
an initial dtml method that processes your form, let call it dtmlForm and it
has a variable prod_req which says how much of the product is requested.
In dtmlForm you of course must call some dtml method which we call
In dtmlVerify you need to check:
do a dtml-let xyz= "queryProduct" ...
do a dtml-if "xyz <= prod_req" then ok else error.
I think that's it.
let me know if this helps.
From: Kenny Flegal <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Tuesday, June 13, 2000 11:48 AM
Subject: [Zope] dtml-if confusion
>I have basically completed a management interface for one of our clients
>using zope. I have your standard product and order management. If a
>orders something that is out of stock I need to create a back order.
>I add an order in a query called addorder, in this I need to set up an if
>statement to make sure their is enough product in stock. I have a seperate
>query called onhand, this selects a product and returns instock a field
>containing the number in stock of a product. I need to pull instock from
>this query and subtract quantity they entered in the form and find out if
>the result is greater than or equal to zero. I have the insert statement
>everything else I just can't figure out how to call instock from the onhand
>query and quantity from REQUEST (I think it is still in request even though
>i am in a ZSQL method) and then test if the result is greater than or equal
>If anyone could help me with this it would be greatly appreciated.
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