Changes between Initial Version and Version 1 of TracWorkflow

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01/31/11 22:41:42 (4 years ago)
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trac (IP: 127.0.0.1)
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  • TracWorkflow

    v1 v1  
     1= The Trac Ticket Workflow System = 
     2[[TracGuideToc]] 
     3 
     4The Trac issue database provides a configurable workflow. 
     5 
     6== The Default Ticket Workflow == 
     7=== Environments upgraded from 0.10 === 
     8When you run `trac-admin <env> upgrade`, your `trac.ini` will be modified to include a `[ticket-workflow]` section. 
     9The workflow configured in this case is the original workflow, so that ticket actions will behave like they did in 0.10. 
     10 
     11Graphically, that looks like this: 
     12 
     13[[Image(htdocs:../common/guide/original-workflow.png)]] 
     14 
     15There are some significant "warts" in this; such as accepting a ticket sets it to 'assigned' state, and assigning a ticket sets it to 'new' state.  Perfectly obvious, right? 
     16So you will probably want to migrate to "basic" workflow; `contrib/workflow/migrate_original_to_basic.py` may be helpful. 
     17 
     18=== Environments created with 0.11 === 
     19When a new environment is created, a default workflow is configured in your trac.ini.  This workflow is the basic workflow (described in `basic-workflow.ini`), which is somewhat different from the workflow of the 0.10 releases. 
     20 
     21Graphically, it looks like this: 
     22 
     23[[Image(htdocs:../common/guide/basic-workflow.png)]] 
     24 
     25== Additional Ticket Workflows == 
     26 
     27There are several example workflows provided in the Trac source tree; look in `contrib/workflow` for `.ini` config sections.  One of those may be a good match for what you want. They can be pasted into the `[ticket-workflow]` section of your `trac.ini` file. 
     28 
     29== Basic Ticket Workflow Customization == 
     30 
     31Create a `[ticket-workflow]` section in `trac.ini`. 
     32Within this section, each entry is an action that may be taken on a ticket.  
     33For example, consider the `accept` action from `simple-workflow.ini`: 
     34{{{ 
     35accept = new,accepted -> accepted 
     36accept.permissions = TICKET_MODIFY 
     37accept.operations = set_owner_to_self 
     38}}} 
     39The first line in this example defines the `accept` action, along with the states the action is valid in (`new` and `accepted`), and the new state of the ticket when the action is taken (`accepted`). 
     40The `accept.permissions` line specifies what permissions the user must have to use this action. 
     41The `accept.operations` line specifies changes that will be made to the ticket in addition to the status change when this action is taken.  In this case, when a user clicks on `accept`, the ticket owner field is updated to the logged in user.  Multiple operations may be specified in a comma separated list. 
     42 
     43The available operations are: 
     44 - del_owner -- Clear the owner field. 
     45 - set_owner -- Sets the owner to the selected or entered owner. 
     46   - ''actionname''`.set_owner` may optionally be set to a comma delimited list or a single value. 
     47 - set_owner_to_self -- Sets the owner to the logged in user. 
     48 - del_resolution -- Clears the resolution field 
     49 - set_resolution -- Sets the resolution to the selected value. 
     50   - ''actionname''`.set_resolution` may optionally be set to a comma delimited list or a single value. 
     51{{{ 
     52Example: 
     53 
     54resolve_new = new -> closed 
     55resolve_new.name = resolve 
     56resolve_new.operations = set_resolution 
     57resolve_new.permissions = TICKET_MODIFY 
     58resolve_new.set_resolution = invalid,wontfix 
     59}}} 
     60 - leave_status -- Displays "leave as <current status>" and makes no change to the ticket. 
     61'''Note:''' Specifying conflicting operations (such as `set_owner` and `del_owner`) has unspecified results. 
     62 
     63{{{ 
     64resolve_accepted = accepted -> closed 
     65resolve_accepted.name = resolve 
     66resolve_accepted.permissions = TICKET_MODIFY 
     67resolve_accepted.operations = set_resolution 
     68}}} 
     69 
     70In this example, we see the `.name` attribute used.  The action here is `resolve_accepted`, but it will be presented to the user as `resolve`. 
     71 
     72For actions that should be available in all states, `*` may be used in place of the state.  The obvious example is the `leave` action: 
     73{{{ 
     74leave = * -> * 
     75leave.operations = leave_status 
     76leave.default = 1 
     77}}} 
     78This also shows the use of the `.default` attribute.  This value is expected to be an integer, and the order in which the actions are displayed is determined by this value.  The action with the highest `.default` value is listed first, and is selected by default.  The rest of the actions are listed in order of decreasing `.default` values. 
     79If not specified for an action, `.default` is 0.  The value may be negative. 
     80 
     81There are a couple of hard-coded constraints to the workflow.  In particular, tickets are created with status `new`, and tickets are expected to have a `closed` state.  Further, the default reports/queries treat any state other than `closed` as an open state. 
     82 
     83While creating or modifying a ticket workfow, `contrib/workflow/workflow_parser.py` may be useful.  It can create `.dot` files that [http://www.graphviz.org GraphViz] understands to provide a visual description of the workflow. 
     84 
     85This can be done as follows (your install path may be different). 
     86{{{ 
     87cd /var/local/trac_devel/contrib/workflow/ 
     88sudo ./showworkflow /srv/trac/PlannerSuite/conf/trac.ini 
     89}}} 
     90And then open up the resulting `trac.pdf` file created by the script (it will be in the same directory as the `trac.ini` file). 
     91 
     92After you have changed a workflow, you need to restart apache for the changes to take effect. This is important, because the changes will still show up when you run your script, but all the old workflow steps will still be there until the server is restarted. 
     93 
     94== Example: Adding optional Testing with Workflow == 
     95 
     96By adding the following to your [ticket-workflow] section of trac.ini you get optional testing.  When the ticket is in new, accepted or needs_work status you can choose to submit it for testing.  When it's in the testing status the user gets the option to reject it and send it back to needs_work, or pass the testing and send it along to closed.  If they accept it then it gets automatically marked as closed and the resolution is set to fixed.  Since all the old work flow remains, a ticket can skip this entire section. 
     97 
     98{{{ 
     99testing = new,accepted,needs_work -> testing 
     100testing.name = Submit to reporter for testing 
     101testing.permissions = TICKET_MODIFY 
     102 
     103reject = testing -> needs_work 
     104reject.name = Failed testing, return to developer 
     105 
     106pass = testing -> closed 
     107pass.name = Passes Testing 
     108pass.operations = set_resolution 
     109pass.set_resolution = fixed 
     110}}} 
     111 
     112== Example: Limit the resolution options for a new ticket == 
     113 
     114The above resolve_new operation allows you to set the possible resolutions for a new ticket.  By modifying the existing resolve action and removing the new status from before the `->` we then get two resolve actions.  One with limited resolutions for new tickets, and then the regular one once a ticket is accepted. 
     115 
     116{{{ 
     117resolve_new = new -> closed 
     118resolve_new.name = resolve 
     119resolve_new.operations = set_resolution 
     120resolve_new.permissions = TICKET_MODIFY 
     121resolve_new.set_resolution = invalid,wontfix,duplicate 
     122 
     123resolve = assigned,accepted,reopened -> closed 
     124resolve.operations = set_resolution 
     125resolve.permissions = TICKET_MODIFY 
     126}}} 
     127 
     128== Advanced Ticket Workflow Customization == 
     129 
     130If the customization above is not extensive enough for your needs, you can extend the workflow using plugins.  These plugins can provide additional operations for the workflow (like code_review), or implement side-effects for an action (such as triggering a build) that may not be merely simple state changes.  Look at [trac:source:trunk/sample-plugins/workflow sample-plugins/workflow] for a few simple examples to get started. 
     131 
     132But if even that is not enough, you can disable the !ConfigurableTicketWorkflow component and create a plugin that completely replaces it. 
     133 
     134== some ideas for next steps == 
     135 
     136New enhancement ideas for the workflow system should be filed as enhancement tickets against the `ticket system` component.  If desired, add a single-line link to that ticket here. 
     137 
     138If you have a response to the comments below, create an enhancement ticket, and replace the description below with a link to the ticket. 
     139 
     140 * the "operation" could be on the nodes, possible operations are: 
     141   * '''preops''': automatic, before entering the state/activity 
     142   * '''postops''': automatic, when leaving the state/activity 
     143   * '''actions''': can be chosen by the owner in the list at the bottom, and/or drop-down/pop-up together with the default actions of leaving the node on one of the arrows. 
     144This appears to add complexity without adding functionality; please provide a detailed example where these additions allow something currently impossible to implement. 
     145 
     146 * operations could be anything: sum up the time used for the activity, or just write some statistical fields like  
     147A workflow plugin can add an arbitrary workflow operation, so this is already possible. 
     148 
     149 * set_actor should be an operation allowing to set the owner, e.g. as a "preop": 
     150   * either to a role, a person 
     151   * entered fix at define time, or at run time, e.g. out of a field, or select. 
     152This is either duplicating the existing `set_owner` operation, or needs to be clarified. 
     153 
     154 * Actions should be selectable based on the ticket type (different Workflows for different tickets) 
     155This is becoming a frequent request, with clear usecases.  The closest the current implementation will allow is to have a plugin provide a `triage` action that sets the next state based on the ticket type, so a `new` ticket would move to `new_task`, `new_defect`, etc., and the workflow graph would separate at that point.