else

Conditional block execution.

<r:if test='visitor.is_admin?'>
  do something
  <r:else>
    do something else
  </r:else>
</r:if>

All contexts that can potentially return nil are treated as “if” clauses:

<r:to_publish>
  some articles are waiting for publication
  <r:else>
    nothing to publish
  </r:else>
</r:to_publish>

Or

<r:hot>
  <r:text/> <!-- show hot text -->
  <r:else>
    <r:text/> <!-- show current text -->
  </r:else>
</r:hot>

shortcuts

Sometimes we just need to write a message or execute a method. In this case we should use the “do” syntax:

<r:else do='text'/>
or
<r:else do='t' text='nothing to publish'/>

html attributes

You can overwrite html attributes from the main if tag in the else clause:

<div do='if' test='name'>
  I have a name
  <r:else class='error'>
    I do not have a name !
  </r:else>
</div>

On a node with an empty ‘name’ attribute, this will produce:

<div class='error'>I do not have a name !</div>

tricks with context

See the else clause of context for tricks with the “else” clause:

<r:hot else='self' do='zazen(text)'/>