Conditionally display fields based on ticket type
This plugin allows you to hide or show fields when creating or viewing a ticket, depending on the ticket type. Only the presentation changes, not the contents of the ticket.
This plugin is standalone; the patch blackmagic-conditionalfields.patch in #2486 did not match with newer releases of Trac 0.11.
Some problems reported about the more powerful DynamicFieldsPlugin (bad scaling for many fields, malfunction if fields are internally sorted, clearing value of hidden fields) should not occur here.
It should be easy to extend this plugin, eg for dependence on parameters other than ticket type.
The plugin was tested under Trac 0.11 and 0.12.
If you have any issues, create a new ticket.
Download the zipped source from here.
General instructions on installing Trac plugins can be found on the TracPlugins page.
First, configure your trac.ini file as in this example:
[components] condfieldsgenshi.* = enabled ... [condfieldsgenshi] tweaks = field1, field2 default = disable field1.type_cond = defect field2.type_cond = task field3.type_cond = !enhancement, task
Now field1 will be shown only if the ticket type is defect, field2 only if the ticket type is task, and field3 only if the ticket type is neither "task" nor "enhancement".
default = disable
means that the field listed under tweaks are not shown by default.
The default value is default = enable.
To disable/enable a field independent of the ticket type, simply write a line like:
field1.type_cond = None
Supposing there is no None type.
When you change the ticket type, you must type preview respectively submit before you can see the effect of condfieldsgenshi.
Bug fix done for type field
When the ticket type is given as an URL parameter only:
and the ticket type field is disabled, this plugin works nevertheless, in contrast to the CondFieldsPlugin.
The type field label is extended by (Fixed) in this case now.