Manage ticket queues via drag-and-drop

Notice: This plugin is unmaintained and available for adoption.


This plugin converts one or more reports into work "queues". A work queue allows you to drag-and-drop tickets into their relative priority order (similar to the Netflix Queue). Ticket positions in a queue get maintained in a custom field of your choosing. This plugin requires JavaScript and jquery-ui (included) for the sortable behavior.

The motivation for this plugin is for when you want to organize a work load in the order you intend to tackle it, ie as a work queue. Queues can be defined or segmented by milestone or any field(s) (or no fields). See the examples below for more details.

Bugs/Feature Requests

Existing bugs and feature requests for QueuesPlugin are here.

If you have any issues, create a new ticket.


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Download the zipped source from here.


You can check out QueuesPlugin from here using Subversion, or browse the source with Trac.


Install the plugin. See TracPlugins for installation details and options. You will need to restart Trac's web server after installation.

Enable the plugin by adding the following to your trac.ini file:

queues.* = enabled

You can alternatively use the Trac Web Admin GUI to enable any or all rules.


  1. Create a custom field to contain the position information, example trac.ini file:
    position = text
  1. Create/modify reports to be used as ticket queues whose first column's name must match the (custom) field created in step 3 above:
    • Can contain uppercase characters, which will get converted to lowercase.
    • Can use spaces, which will get removed.
  1. Tell the plugin which reports to convert to queues, example trac.ini file:
    reports = 13,14

See the examples below for more detailed configuration examples, options and capabilities.


This plugin is built from many parts of Trac, such as reports and dynamic variables. This approach takes advantage of what Trac already offers natively, while still providing flexibility in how you configure the queues. However, this flexibility is traded off against ease-of-use. So this plugin is for advanced users/administrators only!

Team work queue for all tickets

The simplest example is a queue of all tickets. Assuming you already created a new custom position field as described above, you can create a new report like this:

SELECT s.value AS __color__,
   p.value AS position, AS ticket, summary,
   t.type AS type, t.severity, t.owner
FROM ticket t
   LEFT JOIN enum s ON = t.severity AND s.type = 'severity'
   LEFT OUTER JOIN ticket_custom p ON p.ticket = AND = 'position'
WHERE t.status <> 'closed'
               WHEN '' THEN '0'
               ELSE COALESCE(p.value, '0') END) AS UNSIGNED) ASC,
   t.changetime DESC

Notice that the first column is the position custom field and is defined as p.value as position, this is required. The first column's name must always match the name of the custom field used to maintain the queue position. You can name them whatever you want; they just have to match. In the ORDER BY clause, we cast the position field to an integer. This example is for sqlite3; you'll need to check the syntax for the database you're using. If your database does not support casting, you can use position padding option described below. There are no other restrictions to the SQL you use for your reports, as far as I'm aware!

If the report above was created as, say, report 13, then you would need to add it to the [queues] section of the trac.ini file:

reports = 13

You may need to restart your Trac web server afterwards. Here is a screenshot of the result with a few sample tickets:

To reorder the tickets, simply drag and drop them to their desired position in the queue.

Team work queue per milestone

To order your work queue within a milestone, you could create a single report that uses a $MILESTONE report dynamic variable to set the milestone field:

SELECT s.value AS __color__,
   p.value AS position, AS ticket, summary,
   t.type AS type, t.severity, t.owner
FROM ticket t
   LEFT JOIN enum s ON = t.severity AND s.type = 'severity'
   LEFT OUTER JOIN ticket_custom p ON p.ticket = AND = 'position'
WHERE t.status <> 'closed' AND t.milestone = '$MILESTONE'
               WHEN '' THEN '0'
               ELSE COALESCE(p.value, '0') END) AS UNSIGNED) ASC,
   t.changetime DESC

If this was created as report 14, update the trac.ini file:

reports = 13,14

Restart your web server as needed.

Here's the screenshot of the report:

In this example, the optional DynamicVariablesPlugin is used, which converts the MILESTONE dynamic variable (aka argument) from a freeform textbox to a convenient dropdown menu at the right.

Team work queue per milestone with a Triage group

The problem with the above example is that new tickets without a position field will get ordered above your other tickets. This may not always be what you want. So instead you can group the tickets into those with a position and those without and then individually drag-and-drop the new tickets into the ordered queue at your leisure. Here's what the report could look like:

SELECT s.value AS __color__,
      (CASE p.value
         WHEN '' THEN 'Triage'
         WHEN NULL THEN 'Triage'
         ELSE '$MILESTONE'
        END) AS __group__,
   p.value AS position, AS ticket, summary,
   t.type AS type, t.severity, t.owner
FROM ticket t
   LEFT JOIN enum s ON = t.severity AND s.type = 'severity'
   LEFT OUTER JOIN ticket_custom p ON p.ticket = AND = 'position'
WHERE t.status <> 'closed' AND t.milestone = '$MILESTONE'
ORDER BY (CASE p.value
          WHEN '' THEN 'Triage'
          WHEN NULL THEN 'Triage'
          ELSE $MILESTONE END = 'Triage') DESC,
   CAST((CASE p.value
         WHEN '' THEN '0'
         ELSE COALESCE(p.value, '0') END) AS UNSIGNED) ASC,
   t.changetime DESC

In addition to updating trac.ini with the new report number, you now also need to describe what operation the plugin should take for each group:

reports = 13,14,15
group.triage = clear

The group.triage = clear tells the plugin that the Triage group shouldn't reorder positions (reordering is the default operation). The group name Triage is just an example - you can use any name as long as you make the config match it. Here's the screenshot of the report:

The tickets are now grouped with the Triage group at the top. You can drag-and-drop tickets from the Triage group to anywhere in the milestone1 group. Furthermore, you can also clear the position from any ticket by dragging-and-dropping it from the milestone1 group to anywhere in the Triage group (hence the full meaning of the clear operation described above). Note that currently a group must have at least one ticket in it to be able to drag-and-drop tickets into it.

The full list of operation directives is:

  • reorder (the default)
  • clear
  • ignore

There must be only one reorder group per report but you can have any number of clear and ignore groups. The ignore operation will simply list the tickets that match your grouping, but tickets can't be moved out of or into it. This is useful, for example, if you want to show work in the queue that has been implemented but still in, say, a verifying state and not yet closed. The SQL syntax is left as an exercise to the reader.

Tip: You can click on any clear or ignore group heading to toggle between hiding and showing its tickets.

Team work queue per custom field

Another use case is when you want to retain the use of milestones as an orthogonal, date-based means to manage work and use a separate custom field to define queues. For example:

position = text
queue = select
queue.options = |Queue 1|Queue 2|Queue 3

You can simply re-write your SQL query to pivot on a $QUEUE dynamic variable, in this example, instead of (or perhaps in addition to) a $MILESTONE dynamic variable. The important thing is that the position custom field must only be used for one and only one queue.

Personal work queue

You can create a queue for any SQL report as long as the position custom field is used for one and only one queue. Another use case is if you want to use queues simply to let users manage their own work load. You can simply create a report that pivots on the special, built-in $USER dynamic variable. Viola! Personal work queues for everyone using a single report.

Team work queue and personal work queue

What if you wanted both a team work queue that pivoted on, say, a custom queue field and personal work queues as described above? We can't reuse the same position field for each queue. The answer is to create a second custom field to manage the personal work queue's position:

position = text
myposition = text
queue = select
queue.options = |Queues 1|Queue 2|Queue 3

Now you can use the position field as before for the team work queues and the myposition field for the personal work queues using all of the techniques described above. So for instance, the personal work queue in this case may define the first column as mp.value as "My Position". Any uppercase letters are converted to lowercase and any spaces are removed in order to determine the correct field name.

Development work queue and Product Management work queue

The same principle described above for simultaneously supporting team and personal work queues can be used to enable work queues for multiple stakeholders by using separate position fields. So for example, Product Management may want to express their preferred order of work (beyond what a priority field permits) while the development team can use a report/queue that shows Product Management's preferred ordering alongside their own ordering.

Tips / Options

Position padding

Whether or not you cast the position field into an integer for report ordering, you still may want to pad your position numbers with leading 0s so that they sort correctly in any report or custom query in which they appear. You set this up globally in trac.ini:

pad_length = 2

A pad_length of 2 is the default. This means that position 1 will become position 01, etc. Position 10 remains 10, and 100 remains 100. Set it to 1 for no padding.

Maximum position

Typically, the further down a queue you go, the less accurate the ordering becomes. This is natural. Which means that after a point, ordering doesn't really matter anymore. One way to help reinforce this is by defining a max_position value:

max_position = 99

A max_position of 99 is the default. This means that positions 100 and beyond will get set to position 99 whenever they appear in a queue. Set it to 0 for no maximum.

"Max items per page"

Trac automatically paginates reports that contain more tickets than the defined "Max items per page". Depending on your usage of queues, you may want to either set this value lower (or higher) globally for all reports in trac.ini:

items_per_page = 100

.. or bookmark the report queue with a max=N argument as desired. For example, seeing a long queue can be overwhelming or intimidating to some, so you may want to encourage the team to only look at the first 10 or 20 tickets using this argument. However, note that queue reordering only works on the first page of a report queue (it's disabled for subsequent pages). So if you need to reorder items on the second or third page, increase the "Max items per page" argument as needed.

Enhanced user experience

Depending on how you use work queues, several complementary plugins may enhance the user experience:

  • DynamicVariablesPlugin - as described above, this converts dynamic variable textboxes into dropdown menus for those fields which are select fields. This can make navigating amongst queues much easier.
  • DynamicFieldsPlugin - allows you to clear the position field when the milestone/queue field changes and hide the myposition field from general view. These are just small examples of how the plugin can enhance the user experience of this queues plugin.
  • HideChangesPlugin - can hide ticket changes that do not have comments thus reducing the noise from queue reordering changes. See the next audit section for other options.
  • QuietPlugin - dynamically disables email sending when using the AnnouncerPlugin, which helps reduce low-value email noise when using the ticket audit option, see below.

Auditing ticket reorderings

Changing the value of custom fields would normally cause a ticket change which would show up on the ticket. This may be just what you want to audit queue reorderings, however it can be quite noisy. So this plugin allows you to select from several different methods to audit queue reorderings in trac.ini:

audit = log

There are three valid values for the audit option:

  • ticket - changes get written normally to tickets
  • log (default) - changes get written to log (if/as enabled in the [logging] section)
  • none - no auditing at all

Please note that the default audit option is log. It is recommended that you use and configure the HideChangesPlugin to hide commentless changes if you opt for the ticket auditing method. Why would anyone use the none option? You may want queue reorderings to be as lightweight as possible to encourage its use. Having no record of changes is the lightest weight option. The ticket option is the heaviest weight which may discourage its use and also may generate many emails depending on the notification system you're using (see QuietPlugin as one means to prevent these emails while using ticket audit mode). The log option is a middle-ground of the three.

Recent Changes

16027 by rjollos on 2016-11-29 01:21:11
Remove eclipse project files
15979 by rjollos on 2016-11-17 08:39:03
1.2.0dev: Replace virtual script by using add_script_data

Fixes #11632.

15978 by rjollos on 2016-11-17 08:18:00
1.2.0dev: Adapt to Trac 1.0+ database API

  • Create a new branch for Trac 1.2 and later.
  • Drop compatibility code for Trac < 1.2

Patch by justinludwig.

Fixes #12934.



Author: robguttman
Maintainer: none (needsadoption)

Last modified 2 years ago Last modified on May 22, 2022, 6:35:12 AM

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