Defect #23341


Markdown Table formatting breaks with redmine wiki links

Added by Ben Blanco almost 8 years ago. Updated almost 5 years ago.

Text formatting
Start date:
Due date:
% Done:


Estimated time:
Affected version:


When formatting a table in markdown, and inserting internal wiki links via [[wiki_page_name|custom name]], such as:

| header | [[FAQ]] | [[Plugins|List of Plugins]] |
| aaa    | bbb     | ccc                         |

The [[Plugins|List of Plugins]] will get incorrectly truncated at | which is interpreted as signaling the end of that column, and hence the URL link is not generated as it breaks off before reaching the ]].


redmine_3.4.2.png (3.87 KB) redmine_3.4.2.png Ben Blanco, 2017-10-11 17:14
23341.patch (1.27 KB) 23341.patch Takenori TAKAKI, 2018-11-14 14:19
23341-fixed-regexp.patch (1.45 KB) 23341-fixed-regexp.patch Martin Cizek, 2019-08-01 16:11

Related issues

Related to Redmine - Defect #29852: Cannot use Wiki link with a different name in the table of markdownClosed

Actions #1

Updated by Ben Blanco almost 8 years ago

FWIW, in the meantime, the following workaround is available:

Instead of [[wiki_page_name|custom name]] one can write [custom name](wiki_page_name).

Updating the above table example:

| header | [[FAQ]] | [List of Plugins](Plugins) |
| aaa    | bbb     | ccc                        |

Disclaimer: I don't know if this workaround would work for cross-project-wiki references...

Actions #2

Updated by Ben Blanco over 6 years ago

FYI - This problem remains in latest redmine v3.4.2 (and its updated redcarpet gem)

In redmine 3.3.x and 3.4.x, it renders as such:

Could this problem be due to redcarpet gem itself, vs. redmine's integration of redcarpet..?

Actions #3

Updated by Go MAEDA over 5 years ago

  • Related to Defect #29852: Cannot use Wiki link with a different name in the table of markdown added
Actions #4

Updated by Takenori TAKAKI over 5 years ago

I confirmed that redcarpet gem cannot distinguish '|'.
To solve this problem, It is necessary to replace '|', before and after redcarpet is formatting Markdown to HTML.
So, I made a patch that overrides Redcarpet::Render::HTML#preprocess and #postprocess methods and replace '|'.

Actions #5

Updated by Go MAEDA over 5 years ago

  • Target version set to Candidate for next minor release
Actions #6

Updated by Martin Cizek almost 5 years ago

Thanks Takenori for the patch. I've found out that the regexp does not work when it is trying to replace the | placeholder back with |, as the placeholder is multicharacter and used in a character class.
As a result, it does not work if the name contains e.g. numbers 1, 2 or 4.

The solution is to use this regexp:

          full_document.gsub(/(\[\[(((?![\]\n]|#{pattern}).)+)(#{pattern})(((?![\]\n]|#{pattern}).)+)\]\])/) do |m|
            all, page, separater, title = $1, $2, $4, $5

A new patch is attached (it's against Redmine 3.4 though).


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