openresty/demo/Blog/template/elem/nav.tt

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[%
SET prev_post = undef;
SET next_post = undef;
FOREACH post IN posts;
IF post.id < current;
prev_post = post;
ELSE;
next_post = post;
END;
END -%]
[% IF next_post %]
<a href="#post-[% next_post.id %]">
« [% next_post.title %]
</a>
[% END %]
|
<a href="#post-list"> Main </a>
|
[% IF prev_post %]
<a href="#post-[% prev_post.id %]">
[% prev_post.title %] »
</a>
[% END %]