Version 20 (modified by Andrej Tokarčík, 8 years ago) (diff)


Support for pseudo child-tickets and a visual reference to these within a parent ticket.


Some time ago I came across the problem of how to manage child tickets in a meaningful fashion, we were using coderanger's original MasterTicketsPlugin and it was great until we started to allow tickets to be viewed and created by people outside of our immediate development group. We found that people who were not familiar with our processes would simply create child tickets of the wrong 'type' and needed some help in getting it right. In addition, users found that the lack of visual information (ie. what are this tickets child tickets?) was also a hindrance.

Having child-tickets is extremely useful when it comes to managing multiple releases (ie. a single 'bug-report' ticket and a single 'bug-fix' ticket for each milestone/branch of development), for managing sub-tasks of an issue and for managing 'bug-fixes' required when developing a new (larger) enhancement.

This plugin modifies the ticket description box and adds a child ticket listing table and a 'create' button for adding new child tickets. It has the following features:

It is possible to control in trac.ini the following aspects of child-ticket creation/viewing:

  • allow/disallow child-tickets for a certain type of ticket
  • to define the table headers displayed in the parent ticket
  • to define a default for the child type to be created / restrict the type of child-tickets
  • to define which fields are inherited by child-tickets

Under Trac 0.10 I had to modify the ticket.html templates to get this working in any 'pretty' sense so I have not provided support for 0.10. As of 0.11, the ITemplateStreamFilter allows this to be incorporated nicely into a neat plugin.

In order to keep the plugin as compact and simple as possible and to allow future compatibility with different CSS schemes, I have simply 'pinched' the existing CSS classes for generating the table and its components.

NOTE: The configurability of this plugin has been ported to the Subtickets plugin. See the patches in issues 9-12 at github. -- Chris Nelson


The plugin makes use of the 'ticket-custom' field and so requires no extra db tables to be created. The following fields are required in the 'trac.ini' (see table below for a generic description of the options):

childtickets.* = enabled
childtickets.childtickets.tracchildticketsmodule = enabled

parent = text
parent.format = wiki
parent.label = Parent ID


# 'enhancements' : child tickets will typically be bug-fix tickets with the same milestone, component and keywords.
parent.enhancement.allow_child_tickets = true
parent.enhancement.restrict_child_type = bug-fix, task
parent.enhancement.table_headers = type, status, owner, summary
parent.enhancement.inherit = milestone, component, keywords

# 'bug-report' : child tickets will typically be bug-fix
parent.bug-report.allow_child_tickets = true
parent.bug-report.default_child_type = bug-fix
parent.bug-report.table_headers = type, priority, owner, summary, milestone
parent.bug-report.inherit = component, keywords

# 'issue' : child tickets will typically be task tickets with no default milestone.
parent.issue.allow_child_tickets = true
parent.issue.restrict_child_type = task
parent.issue.table_headers = type, status, owner, summary, milestone

# 'bug-fix' : child tickets are not allowed.
parent.bug-fix.allow_child_tickets = false

# 'task' : child tickets are not allowed.
parent.task.allow_child_tickets = false


parent.<parent-type>.allow_child_tickets Define whether child tickets are allowed or not Default: False
parent.<parent-type>.table_headers List of column headers for display in parent ticket Default: summary, owner
parent.<parent-type>.default_child_type Default child type Default: See [ticket] section of trac.ini (default_type)
parent.<parent-type>.restrict_child_type A list of possible child types, trying to create a child of a different 'type' will create an error. As of version 1.1.0, if this option is used, a list of submit buttons will be rendered allowing the user to decide which type of child ticket he/she wants to create. Default: None
parent.<parent-type>.inherit_milestone Define whether the child will adopt the parent ticket's milestone-- THIS OPTION IS NO LONGER AVAILABLE AND HAS BEEN REPLACED WITH THE 'inherit' OPTION BELOW AS OF VERSION 1.1.0
parent.<parent-type>.inherit Define a list of inherited fields. Default: None
default.max_depth Limit the creation of too deep a hierarchy. Default: 5

Issues / Caveats

  • If you change the behaviour of the parent type (using for example allow_child_tickets/restrict_child_type) and tickets already have child tickets assigned to them you will not receive a warning about any possible conflicts until you try and modify any of the child tickets.
  • If a parent ticket is restricted in some way that no further child tickets can be generated for that ticket 'type', you'll continue to see a list of child tickets but the 'Create' button will be missing.
  • The 'parent.<type>.inherit' option ensures fields are inherited by child tickets, However, all child tickets (regardless of type as defined by 'restrict_child_type') will inherit these values.

Bugs/Feature Requests

Existing bugs and feature requests for ChildTicketsPlugin are here.

If you have any issues, create a new ticket.


Download the zipped source from [download:childticketsplugin here].


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

NOTE: New 'look and feel' For 0.12

Since trac 0.12 has the nice looking 'collapsible' areas for 'Attachments' and 'Modify Ticket' sections, I have decided to use these for the child ticket tables. It is now possible (and looks much nicer, I think!) to hide the child tickets as they are incorporated into there own collapsible section.


Handling multiple bug-fixes for single bug-report

In my last job using trac with svn, we had a branch of development for each milestone of development plus a 'special' milestone to assign for hotfix/patches. Rather than creating a single 'bug-fix' ticket and commenting on the ticket that the fix had been applied to milestone X on branch X, milestone Y on branch Y, etc..., we would create a single 'bug-report' ticket (with version info but no milestone) and this ticket would, after assessment from developers/project-mgr, have a bug-fix child-ticket created per milestone - each with its own life-cycle, priority, (sometimes) developer, etc ...

Handling sub-tasks from a single issue

Probably self explanatory: you have something that needs to be done by several different people. Split it up into sub-tasks.

A New Feature generates bugs

When developing a new feature (a single ticket), our developers would 'finish' the feature and pass it to our testing department. The feature, on the whole, might be OK but require several days testing. Within that time several bugs are generated as a direct result of this new feature. It makes no sense to pass the original feature ticket back to the developers (the feature has not been 'rejected' and is still in testing!), so instead, the testing tem can make 'bug-fix' child-tickets for this parent ticket. The feature might even be released with known bugs but at least they're recorded and owned by someone/somewhere!

Using the 'parent.type.restrict_child_type' Option

If you are using the above option, the available child types will be rendered as individual buttons.

Creating a Progress Bar for Child Tickets

If you have a lot of child tickets for one parent, and want an overview of those tickets, you can use the ProgressMeterMacro as provided by [qwp0]. In order to use this, simply provide the 'parent' as the only search query. For example, if you put the following macro definition in your ticket description:


Then the following will appear in the ticket description:

The ProgressMeterMacro also provides some nice features

Recent Changes

17327 by rjollos on 2019-01-04 20:26:42
Tracchildtickets 2.5.6dev: Configure label

The "New Child Ticket" label can be customized
by editing indirectly through the admin panel,
or directly in trac.ini.

Fixes #13513.

17326 by rjollos on 2019-01-04 19:29:34
Tracchildtickets 2.5.6dev: Add file headers
17044 by rjollos on 2018-02-27 00:56:55
Tracchildtickets 2.5.4: Tag 2.5.4
17043 by rjollos on 2018-02-27 00:54:45
Tracchildtickets 2.5.5: Release and bump version on trunk

Refs #13088.

17042 by rjollos on 2018-02-27 00:52:50
Tracchildtickets 2.5.5dev: Fix TypeError on invalid input

Fixes #13361.



Author: walnut
Maintainer: walnut

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