Changes between Version 3 and Version 4 of TracWorkflow


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Timestamp:
04/07/2021 11:15:20 PM (6 months ago)
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trac
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  • TracWorkflow

    v3 v4  
    1 = The Trac Ticket Workflow System =
     1= The Trac Ticket Workflow System
     2
     3[[PageOutline(2-5,Contents,pullout)]]
    24[[TracGuideToc]]
    3 
    4 The Trac issue database provides a configurable workflow.
    5 
    6 == The Default Ticket Workflow ==
    7 === Environments upgraded from 0.10 ===
    8 When you run `trac-admin <env> upgrade`, your `trac.ini` will be modified to include a `[ticket-workflow]` section.
    9 The workflow configured in this case is the original workflow, so that ticket actions will behave like they did in 0.10.
    10 
    11 Graphically, that looks like this:
    12 
    13 {{{#!Workflow width=500 height=240
    14 leave = * -> *
    15 leave.operations = leave_status
    16 leave.default = 1
    17 accept = new -> assigned
    18 accept.permissions = TICKET_MODIFY
    19 accept.operations = set_owner_to_self
    20 resolve = new,assigned,reopened -> closed
    21 resolve.permissions = TICKET_MODIFY
    22 resolve.operations = set_resolution
    23 reassign = new,assigned,reopened -> new
    24 reassign.permissions = TICKET_MODIFY
    25 reassign.operations = set_owner
    26 reopen = closed -> reopened
    27 reopen.permissions = TICKET_CREATE
    28 reopen.operations = del_resolution
    29 }}}
    30 
    31 There 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?
    32 So you will probably want to migrate to "basic" workflow; [trac:source:trunk/contrib/workflow/migrate_original_to_basic.py contrib/workflow/migrate_original_to_basic.py] may be helpful.
    33 
    34 === Environments created with 0.11 ===
    35 When 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.
    36 
    37 Graphically, it looks like this:
     5The Trac ticket system provides a configurable workflow.
     6
     7== The Default Ticket Workflow
     8
     9When a new environment is created, a default workflow is configured in your trac.ini. This workflow is the basic workflow, as specified in [trac:source:branches/1.4-stable/trac/ticket/workflows/basic-workflow.ini basic-workflow.ini]:
    3810
    3911{{{#!Workflow width=700 height=300
     
    4113leave.operations = leave_status
    4214leave.default = 1
     15
     16create = <none> -> new
     17create.default = 1
     18
     19create_and_assign = <none> -> assigned
     20create_and_assign.label = assign
     21create_and_assign.permissions = TICKET_MODIFY
     22create_and_assign.operations = may_set_owner
     23
    4324accept = new,assigned,accepted,reopened -> accepted
    4425accept.permissions = TICKET_MODIFY
    4526accept.operations = set_owner_to_self
     27
    4628resolve = new,assigned,accepted,reopened -> closed
    4729resolve.permissions = TICKET_MODIFY
    4830resolve.operations = set_resolution
     31
    4932reassign = new,assigned,accepted,reopened -> assigned
    5033reassign.permissions = TICKET_MODIFY
    5134reassign.operations = set_owner
     35
    5236reopen = closed -> reopened
    5337reopen.permissions = TICKET_CREATE
     
    5539}}}
    5640
    57 == Additional Ticket Workflows ==
    58 
    59 There are several example workflows provided in the Trac source tree; look in [trac:source:trunk/contrib/workflow 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. However if you have existing tickets then there may be issues if those tickets have states that are not in the new workflow.
    60 
    61 Here are some [http://trac.edgewall.org/wiki/WorkFlow/Examples diagrams] of the above examples.
    62 
    63 == Basic Ticket Workflow Customization ==
    64 
    65 Note: Ticket "statuses" or "states" are not separately defined. The states a ticket can be in are automatically generated by the transitions defined in a workflow. Therefore, creating a new ticket state simply requires defining a state transition in the workflow that starts or ends with that state.
    66 
    67 Create a `[ticket-workflow]` section in `trac.ini`.
    68 Within this section, each entry is an action that may be taken on a ticket.
     41== Additional Ticket Workflows
     42
     43There are example workflows provided in the Trac source tree, see [trac:source:branches/1.4-stable/contrib/workflow 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. However, if you have existing tickets then there may be issues if those tickets have states that are not in the new workflow.
     44
     45Here are some [trac:WorkFlow/Examples diagrams] of the above examples.
     46
     47== Basic Ticket Workflow Customization
     48
     49'''Note''': Ticket "statuses" or "states" are not separately defined. The states a ticket can be in are automatically generated by the transitions defined in a workflow. Therefore, creating a new ticket state simply requires defining a state transition in the workflow that starts or ends with that state.
     50
     51In the `[ticket-workflow]` section of `trac.ini`, each entry is an action that may be taken on a ticket.
    6952For example, consider the `accept` action from `simple-workflow.ini`:
    70 {{{
     53
     54{{{#!ini
    7155accept = new,accepted -> accepted
    7256accept.permissions = TICKET_MODIFY
    7357accept.operations = set_owner_to_self
    7458}}}
     59
    7560The 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`).
    76 The `accept.permissions` line specifies what permissions the user must have to use this action.
    77 The `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.
     61
     62The `accept.permissions` line specifies the permissions the user must have to use this action. [trac:ExtraPermissionsProvider] can define new permissions to be used here.
     63
     64The `accept.operations` line specifies changes that will be made to the ticket in addition to the status change when the 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.
    7865
    7966The available operations are:
    80  - del_owner -- Clear the owner field.
    81  - set_owner -- Sets the owner to the selected or entered owner.
    82    - ''actionname''`.set_owner` may optionally be set to a comma delimited list or a single value.
    83  - set_owner_to_self -- Sets the owner to the logged in user.
    84  - del_resolution -- Clears the resolution field
    85  - set_resolution -- Sets the resolution to the selected value.
    86    - ''actionname''`.set_resolution` may optionally be set to a comma delimited list or a single value. Example:
    87      {{{
     67- **del_owner** -- Clears the owner field.
     68- **set_owner** -- Sets the owner to the selected or entered owner. Defaults to the current user. When `[ticket] restrict_owner = true`, the select will be populated with users that have `TICKET_MODIFY` permission and an authenticated session.
     69 - ''actionname''`.set_owner` may optionally specify a comma delimited list of users that will be used to populate the select, or a single user. Groups and permissions may also be included in the list //(Since 1.1.3)//. When groups or permissions are specified the select is populated with all members of the group or all users that possess the permission.
     70- **set_owner_to_self** -- Sets the owner to the logged in user.
     71- **may_set_owner** -- Sets the owner to the selected or entered owner. Defaults to the existing owner. //(Since 1.1.2)//.
     72- **del_resolution** -- Clears the resolution field.
     73- **set_resolution** -- Sets the resolution to the selected value.
     74 - ''actionname''`.set_resolution` may optionally be set to a comma delimited list or a single value. The resolution(s) specified in this attribute must be defined in the database. Example:
     75 {{{#!ini
    8876resolve_new = new -> closed
    89 resolve_new.name = resolve
     77resolve_new.label = resolve
    9078resolve_new.operations = set_resolution
    9179resolve_new.permissions = TICKET_MODIFY
    9280resolve_new.set_resolution = invalid,wontfix
    93      }}}
    94  - leave_status -- Displays "leave as <current status>" and makes no change to the ticket.
    95 '''Note:''' Specifying conflicting operations (such as `set_owner` and `del_owner`) has unspecified results.
    96 
    97 {{{
     81}}}
     82- **leave_status** -- Displays "leave as <current status>" and makes no change to the ticket.
     83- **reset_workflow** -- Resets the status of tickets that are in states no longer defined.
     84'''Note:''' Specifying conflicting operations, such as `set_owner` and `del_owner`, has unspecified results.
     85
     86The example that follows demonstrates the `.label` attribute. The action here is `resolve_accepted`, but it will be presented to the user as `resolve`.
     87
     88{{{#!ini
    9889resolve_accepted = accepted -> closed
    99 resolve_accepted.name = resolve
     90resolve_accepted.label = resolve
    10091resolve_accepted.permissions = TICKET_MODIFY
    10192resolve_accepted.operations = set_resolution
    10293}}}
    10394
    104 In this example, we see the `.name` attribute used.  The action here is `resolve_accepted`, but it will be presented to the user as `resolve`.
    105 
    106 For actions that should be available in all states, `*` may be used in place of the state.  The obvious example is the `leave` action:
    107 {{{
     95The `.label` attribute is new in Trac 1.1.3 and is functionally the same as the `.name` attribute, which is now deprecated. If neither `.label` or `.name` is specified, the action will be presented to the user as //resolve accepted//, the underscores having been replaced by whitespace (//Since 1.1.3//).
     96
     97For actions that should be available in all states, `*` may be used in place of the state. The obvious example is the `leave` action:
     98{{{#!ini
    10899leave = * -> *
    109100leave.operations = leave_status
    110101leave.default = 1
    111102}}}
    112 This 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.
    113 If not specified for an action, `.default` is 0.  The value may be negative.
    114 
    115 There 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.
    116 
    117 While creating or modifying a ticket workflow, `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.
    118 
    119 This can be done as follows (your install path may be different).
    120 {{{
    121 cd /var/local/trac_devel/contrib/workflow/
    122 sudo ./showworkflow /srv/trac/PlannerSuite/conf/trac.ini
    123 }}}
    124 And then open up the resulting `trac.pdf` file created by the script (it will be in the same directory as the `trac.ini` file).
    125 
    126 An online copy of the workflow parser is available at http://foss.wush.net/cgi-bin/visual-workflow.pl
    127 
    128 After 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.
    129 
    130 == Example: Adding optional Testing with Workflow ==
    131 
    132 By 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.
    133 
    134 {{{
     103
     104The transition to `*` (`-> *`) means the workflow operation determines the next status. The only configurable ticket workflow operation that determines the next status is `leave_status`. However, another workflow controller can operate on an action with new status `*` and determine the next status.
     105
     106This 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.
     107If not specified for an action, `.default` is 0. The value may be negative.
     108
     109There is one hard-coded constraint to the workflow: tickets are expected to have a `closed` state. The default reports/queries treat any state other than `closed` as an open state.
     110
     111=== Ticket Create Action
     112
     113The ticket create actions are specified by a transition from the special `<none>` state. At least one create action must be available to the user in order for tickets to be created. The create actions defined in the default workflow are:
     114{{{#!ini
     115create = <none> -> new
     116create.default = 1
     117
     118create_and_assign = <none> -> assigned
     119create_and_assign.label = assign
     120create_and_assign.permissions = TICKET_MODIFY
     121create_and_assign.operations = may_set_owner
     122}}}
     123
     124=== Ticket Reset Action
     125
     126The special `_reset` action is added by default for tickets that are in states that are no longer defined. This allows tickets to be individually "repaired" after the workflow is changed, although it's recommended that the administrator perform the action by batch modifying the affected tickets. By default the `_reset` action is available to users with the `TICKET_ADMIN` permission and reset tickets are put in the //new// state. The default `_reset` action is equivalent to the following `[ticket-workflow]` action definition:
     127
     128{{{#!ini
     129_reset = -> new
     130_reset.label = reset
     131_reset.operations = reset_workflow
     132_reset.permissions = TICKET_ADMIN
     133_reset.default = 0
     134}}}
     135
     136Since [trac:milestone:1.0.3] the `_reset` action can be customized by redefining the implicit action. For example, to allow anyone with `TICKET_MODIFY` to perform the `_reset` action, the workflow action would need to be defined:
     137
     138{{{#!ini
     139_reset = -> new
     140_reset.label = reset
     141_reset.operations = reset_workflow
     142_reset.permissions = TICKET_MODIFY
     143_reset.default = 0
     144}}}
     145
     146== Workflow Visualization
     147
     148Workflows can be visualized by rendering them on the wiki using the [WikiMacros#Workflow-macro Workflow macro].
     149
     150Workflows can also be visualized using the `contrib/workflow/workflow_parser.py` script. The script outputs `.dot` files that [https://www.graphviz.org GraphViz] understands. The script can be used as follows (your install path may be different):
     151
     152{{{#!sh
     153$ cd /var/local/trac_devel/contrib/workflow/
     154$ ./showworkflow /srv/trac/PlannerSuite/conf/trac.ini
     155}}}
     156The script outputs `trac.pdf` in the same directory as the `trac.ini` file.
     157
     158== Example: Adding optional Testing with Workflow
     159
     160The following adds a `testing` action. When the ticket has status `new`, `accepted` or `needs_work`, 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 is 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.
     161
     162{{{#!ini
    135163testing = new,accepted,needs_work,assigned,reopened -> testing
    136 testing.name = Submit to reporter for testing
     164testing.label = Submit to reporter for testing
    137165testing.permissions = TICKET_MODIFY
    138166
    139167reject = testing -> needs_work
    140 reject.name = Failed testing, return to developer
     168reject.label = Failed testing, return to developer
    141169
    142170pass = testing -> closed
    143 pass.name = Passes Testing
     171pass.label = Passes Testing
    144172pass.operations = set_resolution
    145173pass.set_resolution = fixed
    146174}}}
    147175
    148 === How to combine the `tracopt.ticket.commit_updater` with the testing workflow ===
    149 
    150 The [[trac:source:trunk/tracopt/ticket/commit_updater.py|tracopt.ticket.commit_updater]] is the optional component that [[TracRepositoryAdmin#trac-post-commit-hook|replaces the old trac-post-commit-hook]], in Trac 0.12.
    151 
    152 By default it reacts on some keywords found in changeset message logs like ''close'', ''fix'' etc. and performs the corresponding workflow action.
    153 
    154 If you have a more complex workflow, like the testing stage described above and you want the ''closes'' keyword to move the ticket to the ''testing'' status instead of the ''closed'' status, you need to adapt the code a bit.
    155 
    156 Have a look at the [[trac:wiki:0.11/TracWorkflow#How-ToCombineSVNtrac-post-commit-hookWithTestWorkflow|Trac 0.11 recipe]] for the `trac-post-commit-hook`, this will give you some ideas about how to modify the component.
    157 
    158 == Example: Add simple optional generic review state ==
     176== Example: Add simple optional generic review state
    159177
    160178Sometimes Trac is used in situations where "testing" can mean different things to different people so you may want to create an optional workflow state that is between the default workflow's `assigned` and `closed` states, but does not impose implementation-specific details. The only new state you need to add for this is a `reviewing` state. A ticket may then be "submitted for review" from any state that it can be reassigned. If a review passes, you can re-use the `resolve` action to close the ticket, and if it fails you can re-use the `reassign` action to push it back into the normal workflow.
     
    162180The new `reviewing` state along with its associated `review` action looks like this:
    163181
    164 {{{
     182{{{#!ini
    165183review = new,assigned,reopened -> reviewing
    166184review.operations = set_owner
     
    168186}}}
    169187
    170 Then, to integrate this with the default Trac 0.11 workflow, you also need to add the `reviewing` state to the `accept` and `resolve` actions, like so:
    171 
    172 {{{
     188To integrate this with the default workflow, you also need to add the `reviewing` state to the `accept` and `resolve` actions:
     189
     190{{{#!ini
    173191accept = new,reviewing -> assigned
    174192[…]
     
    176194}}}
    177195
    178 Optionally, you can also add a new action that allows you to change the ticket's owner without moving the ticket out of the `reviewing` state. This enables you to reassign review work without pushing the ticket back to the `new` status.
    179 
    180 {{{
     196Optionally, you can also add a new action that allows you to change the ticket's owner without moving the ticket out of the `reviewing` state. This enables you to reassign review work without pushing the ticket back to the `new` status:
     197
     198{{{#!ini
    181199reassign_reviewing = reviewing -> *
    182 reassign_reviewing.name = reassign review
    183 reassign_reviewing.operations = set_owner
     200reassign_reviewing.label = reassign review
     201reassign_reviewing.operations = set_owner, leave_status
    184202reassign_reviewing.permissions = TICKET_MODIFY
    185203}}}
    186204
    187 The full `[ticket-workflow]` configuration will thus look like this:
    188 
    189 {{{
     205The full `[ticket-workflow]` configuration will be:
     206
     207{{{#!ini
    190208[ticket-workflow]
     209create = <none> -> new
     210create.default = 1
     211create_and_assign = <none> -> assigned
     212create_and_assign.label = assign
     213create_and_assign.permissions = TICKET_MODIFY
     214create_and_assign.operations = may_set_owner
    191215accept = new,reviewing -> assigned
    192216accept.operations = set_owner_to_self
     
    208232review.permissions = TICKET_MODIFY
    209233reassign_reviewing = reviewing -> *
    210 reassign_reviewing.operations = set_owner
    211 reassign_reviewing.name = reassign review
     234reassign_reviewing.operations = set_owner, leave_status
     235reassign_reviewing.label = reassign review
    212236reassign_reviewing.permissions = TICKET_MODIFY
    213237}}}
    214238
    215 == Example: Limit the resolution options for a new ticket ==
    216 
    217 The 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.
    218 
    219 {{{
    220 resolve_new = new -> closed
    221 resolve_new.name = resolve
    222 resolve_new.operations = set_resolution
    223 resolve_new.permissions = TICKET_MODIFY
    224 resolve_new.set_resolution = invalid,wontfix,duplicate
    225 
    226 resolve = assigned,accepted,reopened -> closed
    227 resolve.operations = set_resolution
    228 resolve.permissions = TICKET_MODIFY
    229 }}}
    230 
    231 == Advanced Ticket Workflow Customization ==
    232 
    233 If 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.
    234 
    235 But if even that is not enough, you can disable the !ConfigurableTicketWorkflow component and create a plugin that completely replaces it.
    236 
    237 == Adding Workflow States to Milestone Progress Bars ==
    238 
    239 If you add additional states to your workflow, you may want to customize your milestone progress bars as well.  See [TracIni#milestone-groups-section TracIni].
    240 
    241 == some ideas for next steps ==
    242 
    243 New 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.  Also look at the [http://trac-hacks.org/wiki/AdvancedTicketWorkflowPlugin AdvancedTicketWorkflowPlugin] as it provides experimental operations.
    244 
    245 If you have a response to the comments below, create an enhancement ticket, and replace the description below with a link to the ticket.
    246 
    247  * the "operation" could be on the nodes, possible operations are:
    248    * '''preops''': automatic, before entering the state/activity
    249    * '''postops''': automatic, when leaving the state/activity
    250    * '''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.
    251 ''This appears to add complexity without adding functionality; please provide a detailed example where these additions allow something currently impossible to implement.''
    252 
    253  * operations could be anything: sum up the time used for the activity, or just write some statistical fields like
    254 ''A workflow plugin can add an arbitrary workflow operation, so this is already possible.''
    255 
    256  * set_actor should be an operation allowing to set the owner, e.g. as a "preop":
    257    * either to a role, a person
    258    * entered fix at define time, or at run time, e.g. out of a field, or select.
    259 ''This is either duplicating the existing `set_owner` operation, or needs to be clarified.''
    260 
    261  * Actions should be selectable based on the ticket type (different Workflows for different tickets)
    262 ''Look into the [http://trac-hacks.org/wiki/AdvancedTicketWorkflowPlugin AdvancedTicketWorkflowPlugin]'s `triage` operation.''
    263 
    264  * I'd wish to have an option to perform automatic status changes. In my case, I do not want to start with "new", but with "assigned". So tickets in state "new" should automatically go into state "assigned". Or is there already a way to do this and I just missed it?
    265 ''Have a look at [http://trac-hacks.org/wiki/TicketCreationStatusPlugin TicketCreationStatusPlugin] and [http://trac-hacks.org/wiki/TicketConditionalCreationStatusPlugin TicketConditionalCreationStatusPlugin]''
    266 
    267  * I added a 'testing' state. A tester can close the ticket or reject it. I'd like the transition from testing to rejected to set the owner to the person that put the ticket in 'testing'. The [http://trac-hacks.org/wiki/AdvancedTicketWorkflowPlugin AdvancedTicketWorkflowPlugin] is close with set_owner_to_field, but we need something like set_field_to_owner.
    268 
    269  * I'd like to track the time a ticket is in each state, adding up 'disjoints' intervals in the same state.
     239== Advanced Ticket Workflow Customization
     240
     241If the customizations above do not meet your needs, you can extend the workflow with plugins. 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:branches/1.4-stable/sample-plugins/workflow sample-plugins/workflow] for a few examples to get started.
     242
     243But if even that is not enough, you can disable the !ConfigurableTicketWorkflow component and create a plugin that completely replaces it. See also the [https://trac-hacks.org/wiki/AdvancedTicketWorkflowPlugin AdvancedTicketWorkflowPlugin], which provides additional operations.
     244
     245== Adding Workflow States to Milestone Progress Bars
     246
     247If you add additional states to your workflow, you may want to customize your milestone progress bars as well. See the [TracIni#milestone-groups-section "[milestone-groups]"] section.
     248
     249== Ideas for next steps
     250
     251Enhancement ideas for the workflow system should be filed as enhancement tickets against the [trac:query:?status=assigned&status=new&status=reopened&keywords=~workflow&component=ticket+system ticket system] component.  You can also document ideas on the [trac:TracIdeas/TracWorkflow TracIdeas/TracWorkflow] page.