[TAP5-205] Add an empty parameter to the Loop component, to display a message when there are no items to loop over

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.0.15
• Fix Version/s: 5.0.16
• Assignee: Howard Lewis Ship
• Reporter: D. Marquis
• Created: 29/Feb/08 22:52
• Updated: 31/Oct/08 21:30
• Resolved: 31/Oct/08 21:30

Description

I have a quick suggestion to improve the Loop component:

We should be able to specify a block to display if the loop source is
empty (size = 0)

<div t:type="loop" source="anEmptyList">
<t:parameter name="empty">There is no item matching your request</
t:parameter>
</div>

I know we can do this :
<t:if test="anEmptyList">
<div t:type="loop" source="anEmptyList">

</div>
<t:parameter name="else">There is no item matching your request</t:parameter>
</t:if>

BUT this will have the result of calling the "getAnEmptyList()" getter
in the component code twice.
If you access the database in the getter (as the docs suggest quite a
few times), this will call the database twice for nothing.

Thanks !