How To Define Global Tags
Global tags are Radius rags like
If you have deployed Radiant with the—unpack switch, you can edit app/models/page_context.rb directly.
Alternatively you can write an extension, as covered in Creating_Radiant_Extensions?.
Examples
If Children Exist
To create a new tag that only renders its content when the current page has children, use this code {{{ tag “if_children” do |tag| tag.expand if tag.locals.page.has_children? end }}}Then in your page write
{{{
<r:if_children>
<ul>
<r:children:each by="title" order="asc">
<li><r:link /></li>
</r:children:each>
</ul>
</r:if_children>
}}}
This will create a unordered list of links to the children of the page, sorted by ascending title, if any exist.
Random Child Page
{{{ tag “children:random” do |tag| children = tag.locals.children if children.size > 0 index = rand(children.size) tag.locals.page = children[index] tag.expand end end }}}
Then in your page, write
{{{Or just
{{{Note that this will only select one child page, and needs modification to select more than one.
Refer to the Parent Page
{{{ tag “parent” do |tag| tag.locals.page = tag.locals.page.parent tag.expand if tag.locals.page.has_parent? end
tag “if_parent” do |tag| tag.expand if tag.locals.page.has_parent? end
tag “unless_parent” do |tag| tag.expand unless tag.locals.page.has_parent? end }}}
In your page, write this:
{{{This will create a link to the parent page that says “Go up”.
