api:null
The api:null keyword checks that an attribute does not exist in the specified item.
Parameters
- item: The item to check. If not specified, the default output item is used.
- attr: The name of the attribute to check.
- action: The action to perform if the expression evaluates to true. Allowed values: break, continue.
Control Attributes
NoneExample
Define missing title attributes.<api:call op="fileListDir" output="out">
<api:null attr="filename">
<api:set attr="title" value="Unnamed File"/>
<api:else>
<api:set attr="title" value="[filename]"/>
</api:else>
</api:null>
<api:push title="[title]">
[out.file:*]
</api:push>
</api:call>
See Also
- api:else: Create a block which is executed if the condition is not satisfied.