Flow: error appears in Special:Flow/Talk.... after running on mw 1.21.
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	Qgil
	Sep 17 2013, 11:39 PM

Description

Trying to run Flow in 1.21 (yes, not officially supported, still I want to try). After apparently successful installation this error appears in any Special:Flow/Talk... page:

Unknown flow type 'discussion' requested

Backtrace:

#0 /path/to/extensions/Flow/includes/WorkflowLoader.php(68): Flow\WorkflowLoader->loadDefinition()
#1 /path/to/extensions/Flow/includes/WorkflowLoader.php(45): Flow\WorkflowLoader->loadWorkflow(Object(Title))
#2 /path/to/extensions/Flow/includes/WorkflowLoader.php(200): Flow\WorkflowLoader->__construct(Object(Title), NULL, false, Object(Flow\Data\ManagerGroup), Object(Flow\Data\RootPostLoader))
#3 /path/to/extensions/Flow/special/SpecialFlow.php(51): Flow\WorkflowLoaderFactory->createWorkflowLoader(Object(Title), NULL)
#4 .../includes/SpecialPage.php(613): SpecialFlow->execute('Talk:Happiness_...')
#5 .../includes/SpecialPageFactory.php(487): SpecialPage->run('Talk:Happiness_...')
#6 .../includes/Wiki.php(291): SpecialPageFactory::executePath(Object(Title), Object(RequestContext))
#7 .../includes/Wiki.php(565): MediaWiki->performRequest()
#8 .../includes/Wiki.php(458): MediaWiki->main()
#9 .../index.php(59): MediaWiki->run()
#10 {main}

I have re-run the update script after cleaning, as explained at https://www.mediawiki.org/wiki/Extension_talk:Flow#Internal_errors_32348 - but the same bug is still there.

Version: master
Severity: normal

Details

Reference: bz54250

Event Timeline

• bzimport raised the priority of this task from to Needs Triage.Nov 22 2014, 1:56 AM

• bzimport added a project: StructuredDiscussions.

• bzimport set Reference to bz54250.

• bzimport added a subscriber: Unknown Object (MLST).

Qgil created this task.Sep 17 2013, 11:39 PM

Prioritization and scheduling of this bug is tracked on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/184

Hmm, that is quite odd. Could you paste the output of

SELECT * FROM flow_definition

If there are values there, but not one with definition_name = 'discussion' then something went wrong, easiest fix would be to truncate the table and re-run the update script to get the right data in there. If there is no data in there, then I'm not sure. At that point i will probably just stop by your desk and peek at it :)

Maybe the problem is that prefix names for databases are still not well supported or even considered? afaiu this was the root cause of Bug 54076

In my installation all the MediaWiki tables are preceded with $wgDBprefix - and I believe this is the normal default for most MediaWikis out there.

Therefore:

SELECT * FROM flow_definition
--> #1146 - Table 'espiral_b.flow_definition' doesn't exist

SELECT * FROM espiral_bflow_definition
--> MySQL returned an empty result set (i.e. zero rows). (Query took 0.0001 sec)

I rebuild my vagrant install using a custom wgDBprefix, but it still seems to work from here:

(22:56) root@localhost:[wiki]> desc zomgflow_definition
    -> ;
+--------------------+---------------+------+-----+---------+-------+
| Field              | Type          | Null | Key | Default | Extra |
+--------------------+---------------+------+-----+---------+-------+
| definition_id      | binary(16)    | NO   | PRI | NULL    |       |
| definition_wiki    | varbinary(32) | NO   | MUL | NULL    |       |
| definition_name    | varbinary(32) | NO   |     | NULL    |       |
| definition_type    | varbinary(32) | NO   |     | NULL    |       |
| definition_options | blob          | YES  |     | NULL    |       |
+--------------------+---------------+------+-----+---------+-------+
5 rows in set (0.00 sec)

(22:56) root@localhost:[wiki]> select * from zomgflow_definition;
+------------------+-----------------+-----------------+-----------------+-----------------------------------------------------------------------------
| definition_id    | definition_wiki | definition_name | definition_type | definition_options                                                          
+------------------+-----------------+-----------------+-----------------+-----------------------------------------------------------------------------
| ^E^Dῐ<B5>^CO^_ '<A0><82>"      | wiki-zomg       | topic           | topic           | NULL                                                          
| ^E^Dῐ<D1>^CO^_ '<A0><82>"      | wiki-zomg       | discussion      | discussion      | a:2:{s:19:"topic_definition_id";O:15:"Flow\Model\UUID":1:{s:14
+------------------+-----------------+-----------------+-----------------+-----------------------------------------------------------------------------
2 rows in set (0.00 sec)

(22:56) root@localhost:[wiki]>

So i'm not sure how where its running into the issues. Additionally if the FlowInsertDefaultDefinition maintenance script was trying to manipulate the tables with the prefix, it should at least throw a big fat error that the tables dont exist, rather than successfully completing. Since i can't reproduce the error locally, it might be simplest if I pop into your installation to dump various debugging values and see where it goes wrong?

I moved my wiki to http://orain.org where I don't install my own extensions, they are running currently 1.22wmf22 and there is no Flow.

It sounds like I had a local problem. Resolving as INVALID.

Flow: error appears in Special:Flow/Talk.... after running on mw 1.21.Closed, InvalidPublicActions

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Flow: error appears in Special:Flow/Talk.... after running on mw 1.21.
Closed, InvalidPublic
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