I am developing a product catalog and shopping cart model and view, where the user can add a product to the card and delete an item from the cart. The model looks like this.
<order-desk>
<products>
<product>
<product-id>64</product-id>
<product-name>Software 1.x, Annual Lease</product-name>
<unit-price>0.20</unit-price>
</product>
<product>
<product-id>65</product-id>
<product-name>Software 1.x, Annual Support</product-name>
<unit-price>0.50</unit-price>
</product>
</products>
<cart-items>
<cart-item>
<product/>
<thru-date/>
<entitlement-key/>
<product-name/>
<unit-price/>
</cart-item>
</cart-items>
</order-desk>In the view, the code that creates a new cart-item, looks like this.
<table> <!-- table of products ->
<xforms:repeat nodeset="products/product" id="prodset">
<!-- product fields -->
<tr><td><xforms:output.../></td></tr>
<tr><td><xforms:output.../></td></tr>
...
<tr><td> <xforms:submit>
<xforms:label>Add To Order</xforms:label>
<xforms:insert
nodeset="/order-desk/cart-items/cart-item"
at="last()" position="after"/>
<xforms:setvalue
ref="/order-desk/cart-items/cart-item[last()]/product-id"
value="/order-desk/products/product[index('prodset')]/product-id"/>
<xforms:setvalue
ref="/order-desk/cart-items/cart-item[last()]/product-name"
value="/order-desk/products/product[index('prodset')]/product-name"/>
<xforms:setvalue
ref="/order-desk/cart-items/cart-item[last()]/unit-price"
value="/order-desk/products/product[index('prodset')]/unit-price"/>
</xforms:submit>
</td></tr></xforms:repeat></table>
Problem ------- When the submit is performed the first time, it works as expected. A new cart-item is appended to the model, its fields are plugged with values from the product row containing the submit element, and a row showing the new cart-item is added to the cart items table.
When the submit is perfomed the second time, a dialog saying 'The document contains no data' pops up, and no new row is created.
I've seen this bug before, but it went away when I booted tomcat, re-deployed, and rebooted again. This time, that is not working.
Previously, when it worked, I was only updating one field (product-id) with setvalue. My most recent change was to add updates for two more fields, product-name and unit-price
Questions -------- 1. What empty document is the pop up most probably referring to ? 2. If this is not a legit approach, what would be another way to achieve the same thing, i.e. building cart items from selected product items.
-- Bill Winspur Manager, Wynnon Systems Inc Mobile: 403-519-5889
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