Feature #3879

"What Links Here" in right hand column

Added by Ben Oakes over 2 years ago. Updated about 2 years ago.

Status:New Start date:2009-09-16
Priority:Normal Due date:
Assignee:- % Done:

0%
Category:Wiki
Target version:-
Resolution:

Description

Similar to Wikipedia, it'd be nice to have a list of all the wiki pages that link to the wiki page currently being viewed. For example, it could look like the following:

Wiki

  • Start page
  • Index by title
  • Index by date

What Links Here

  • Wiki Page 1
  • Wiki Page 2
  • ...
  • Wiki Page N

Without this, it's hard to tell where to go for related information.

History

#1 Updated by Emp Imp about 2 years ago

I second this request.

#2 Updated by Ben Oakes about 2 years ago

I thought about this with a colleague the other day. Here's a sketch of how it might work, if anyone wants to implement it.

Ingredients:

  • A page_links join table (two columns, something like: source_page and linked_page)
  • An observer on the wiki page model
  • A method on the wiki page parser that gives an array of links

On save, the source page would delete all its rows in page_links, parse the new page content for links, and update the join table with which pages are now linked.

To display "what links here", all that would be needed is a query to give all page_links rows with a linked_page of the currently viewed page. The pages that link to that page are the source_page values in the result of that query.

Example:

page_links has no rows.

I create a page called "foo" with this content:

This is a page about foo. Related topics: [[bar]], [[baz]].

page_links then has:

source_page linked_page
foo bar
foo baz

Then, I create a page named "bar":

This is a page about bar.

To find the pages that link to "bar", I query for page_links with a linked_page of "bar". Result:

source_page linked_page
foo bar

So, "foo" is the only page that links to "bar".

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