← 1.1.3 | 1.1.5 →

Documenting API changes since 1.1.3

The next stable version of Trac will be named 1.2 and will contain the cumulative changes made in the successive 1.1.x releases.

These notes reflect the current status for 1.1.4, in trunk​.

Proposed changes are prefixed with an OPEN mark and the paragraph is written in italics.

Summary

1. Prerequisites
   1. Modified Dependencies
      1. jQuery and jQuery UI (bundled)
      2. Babel (optional)
      3. Genshi (mandatory)
      4. Databases
      5. Other
   2. Deprecated Modules Removed
   3. New Dependencies
2. Detailed List of Developer Visible Changes
3. Other Modifications made to the 1.0 API
   1. Modified Interfaces
      1. IWikiChangeListener ^{(1.1.3)​ (1.0)​}
      2. IPreferencePanelProvider ^{(1.1.3)​ (1.0)​}
   2. New Interfaces
      1. trac.notification.api.INotificationDistributor ^(1.1.3)​
      2. trac.notification.api.INotificationFormatter ^(1.1.3)​
      3. trac.notification.api.INotificationSubscriber ^(1.1.3)​
      4. trac.notification.api.IEmailAddressResolver ^(1.1.3)​
      5. trac.notification.api.IEmailDecorator ^(1.1.3)​
   3. Notification API Changes
   4. Database API Changes
      1. Environment.get_db_cnx has been removed
      2. db parameters removed from function and method signatures
      3. ConnectionBase class
   5. Template and CSS changes
   6. Uncategorized Changes
4. New in the 1.1.4 API

Prerequisites

Only Python versions 2.6 and 2.7 are supported.

The following language feature introduced in Python 2.6 can now be used and the related clean-ups can be done:

• use string ​format(), print()
• except Cls as val
• class decorators to avoid the implements hack?
• @prop.setter / @prop.deleter
• namedtuples!
• there's no longer need of from __future__ import with_statement
• next(iterator, [default]) to clean-up some unit tests
• timeout in smtplib

Modified Dependencies

See ​gmessage:trac-dev:nkMUY_8ILF0/rg1rsArDIewJ for a discussion about what dependencies we'll support in Trac 1.2.

jQuery and jQuery UI (bundled)

The bundled version of ​jQuery will be 1.9 / 2.0 instead of 1.8.3 in Trac 1.1.1.

See jQuery release notes for the corresponding major updates:

• ​http://blog.jquery.com/2013/01/15/jquery-1-9-final-jquery-2-0-beta-migrate-final-released/

OPEN The bundled version of the full minified ​jQuery UI package will be at least ​1.11.2. See #11019.

Babel (optional)

The internationalization support (i18) for Trac is depending on ​Babel, version 1.0. (#10882) TODO

Babel ≥ 0.9.5 is still supported.

Genshi (mandatory)

OPEN Genshi 0.7

Genshi 0.6.x is still supported.

Databases

Database
SQLite	?
PostgreSQL	?
MySQL / MariaDB	?
Database Bindings
pysqlite	2.4.1 (version provided by Python 2.6)
psycopg2	?
MySQLdb	?

Other

Package	Req or Opt?	Version supported
SetupTools	Required	≥ 0.6, 5.4 - 5.6 are not recommended.
Git	Optional	≥ 1.5.6
Subversion	Optional	≥ 1.6, however let's consider dropping support for 1.6
ConfigObj	Optional	Unspecified. Let's consider enforcing a minimum version, such as ≥ 5.0. ConfigObj 5.0 released on ​2014-02-15
DocUtils	Optional	≥ 0.3.9
Textile	Optional	≥ 2.0
Pygments	Optional	≥ 0.6. Let's consider bumping the requirement to at least 1.0, released in ​2008

… please add any dependencies I've overlooked.

Deprecated Modules Removed

TODO Remove support for mod_python (see TracModPython) … or maybe not. It seems the project is alive (comment:34:ticket:11605).

DONE Removed Enscript, SilverCity and PHP renderers.

New Dependencies

None!

Detailed List of Developer Visible Changes

Component: database backend (3 matches)

Ticket	Summary
#11859	Add get_database_version and set_database_version methods to DatabaseManager class
API Changes	The database version for Trac and plugins can be retrieved using the get_database_version and set_database_version methods of the DatabaseManager class.
#11893	Add reset_tables method to ConnectionBase class
API Changes	Added reset_tables method to the ConnectionBase class and each class implementing the ABC. Added reset_tables and insert_into_tables methods to the DatabaseManager class.
#11894	_parse_db_str should not be a protected member of module
API Changes	Renamed _parse_db_str in the trac.db.api module to parse_connection_uri. The latter is aliased to the former for backwards compatibility.
Component: general (4 matches)
Ticket	Summary
#11648	Model classes should have a resource property
API Changes	Every model class has a resource property and the Resource objects are created on access, replacing several cases in which resource was an attribute and the Resource object was created in the initializer and other class methods.
#11707	Module and other classes should have a realm attribute
API Changes	The IResourceManager implementation defines the realm through a class attribute, which is then assigned to model and module classes (classes implementing IResourceHandler). This allows the singly-defined realm attribute to be used throughout the package and avoids the repeated use of static strings.
#11815	Test failures due to enabled unit test components in functional tests
API Changes	Environment.is_component_enabled returns None if passing a component in the trac.tests package.
#11824	Remove //Since// version information from TracIni documentation
API Changes	Leading and trailing whitespace is stripped from translatable string (plugin developers should use cleandoc from trac.util.text). Previously only uniform indentation was removed.
Component: notification (5 matches)
Ticket	Summary
#3517	Notification plugin
API Changes	Added new API for notification distribution and extension points: INotificationDistributor: For different notification distribution channels INotificationFormatter: For customized notification message formatting IEmailAddressResolver: For finding email addresses IEmailDecorator: For adding email headers independently from message formatting
#4056	Notification Preferences
API Changes	Added new extension point INotificationSubscriber.
#11853	Modular preference pages with child panels
API Changes	IPreferencePanelProvider.get_preference_panels() can now return (panel, label, parent_panel) triples to make child panels appear as part of the indicated parent panel.
#11854	Split up notification module
API Changes	Added mail notification helper functions create_charset, create_mime_text, create_header, create_message_id, and class RecipientMatcher (matches recipients taking into account admit_domains, ignore_domains, use_short_addr and smtp_default_domain config options).
#11869	Add DB table for notification subscribers watching individual resources
API Changes	Added new trac.notification.model.Watch class for managing watch preferences in the new notify_watch DB table.
Component: rendering (1 match)
Ticket	Summary
#11873	Return a NamedTuple from Mimeview.get_supported_conversions
API Changes	Mimeview.get_supported_conversions(...) returns a namedtuple MimeConversion, with the entries retaining the same ordering as the previous tuple.
Component: ticket system (6 matches)
Ticket	Summary
#10833	ConfigurableTicketWorkflow's "Reassign To" ignores fine-grained permissions with restrict_owner=True
API Changes	EnvironmentStub has an insert_known_users method for populating the session table with known users.
#11699	Use Chrome.authorinfo in render_ticket_action_controller
API Changes	The final character in the string returned from separated() in trac.util.presentation can be specified through the last parameter, which defaults to None. Chrome.authorinfo() returns a span with class trac-author-anonymous and trac-author-none when the author input is anonymous and None, respectively. Chrome.format_author() returns (none) for any author input that is falsy.
#11717	Highlight the whole referenced comment
API Changes	On the ticket page the id #comment:%s was moved from the comment span to the enclosing h3.
#11794	Rename 'Comments only' label in #prefs on the ticket page
API Changes	On the ticket prefs form the id of the Show property changes (formerly Comments only) checkbox was renamed from trac-comments-only-toggle to trac-show-property-changes-toggle.
#11839	Allow groups to be specified in the set_owner workflow attribute
API Changes	The PermissionSystem method get_groups_dict returns a dictionary of groups and group members. The method get_users_dict returns a dictionary of users and user permissions.
#11892	Move group_milestones from trac.ticket.model to trac.ticket.roadmap
API Changes	Moved group_milestones function from trac.ticket.model to trac.ticket.roadmap. Compatibility function has been left in trac.ticket.model and will be removed in 1.3.1.
Component: version control (1 match)
Ticket	Summary
#11703	Remove deprecated [trac] repository_dir option for configuring repository
API Changes	Removed deprecated authname parameter from Environment.get_repository().
Component: wiki system (1 match)
Ticket	Summary
#6573	Allow change comment edit after commit.
API Changes	Added new optional method wiki_page_comment_modified() in IWikiChangeListener.

Other Modifications made to the 1.0 API

Take the will be removed in version 1.1.1 comments in the code seriously. The earlier the planned API changes in 1.1.x, the better (gives more time to plugin authors to adapt). TODO

Modified Interfaces

IWikiChangeListener ^{(1.1.3)​ (1.0)​}

Wiki page version comments can now be edited, so wiki_page_comment_modified(page, old_comment) has been added to allow plugins to be notified of this.

IPreferencePanelProvider ^{(1.1.3)​ (1.0)​}

IPreferencePanelProvider implementations can now provide child panels that appear as sections appended to other panels (proposal). This allows plugins to extend existing preference panels.

New Interfaces

trac.notification.api.INotificationDistributor ^(1.1.3)​

A new INotificationDistributor interface was added (proposal). It allows plugins to distribute notifications on different channels (e.g. over XMPP).

trac.notification.api.INotificationFormatter ^(1.1.3)​

A new INotificationFormatter interface was added (proposal). It allows plugins to format notifications (e.g. to HTML).

trac.notification.api.INotificationSubscriber ^(1.1.3)​

A new INotificationSubscriber interface was added (proposal). It allows plugins to provide more subscription preferences (e.g. to send or suppress notifications under special conditions).

trac.notification.api.IEmailAddressResolver ^(1.1.3)​

A new IEmailAddressResolver interface was added (proposal). It allows plugins to retrieve email addresses from users (e.g. from LDAP).

trac.notification.api.IEmailDecorator ^(1.1.3)​

A new IEmailDecorator interface was added (proposal). It allows plugins to add or tweak email headers.

Notification API Changes

To take advantage of the new notification related interfaces, code that sends notifications must use the new Notification API instead of the NotifyEmail class hierarchy. (See proposal)

Database API Changes

Methods have been added to DatabaseManager class for settings and retrieving the database version for Trac and plugins: set_database_version and get_database_version (#11859).

Environment.get_db_cnx has been removed

Following the deprecation made in 0.12, the method Environment.get_db_cnx has been removed.

One should now only use the context managers for retrieving a database Connection in read or write mode.

• a read-only Connection can be used to form queries:

  with env.db_query as db:
      ...
  

  a db instance obtained the above way should only be used for executing SELECT queries
• a writable Connection can be used to modify the database content in a transaction:

  with env.db_transaction as db:
      ...
  

  a db instance obtained the above way can be used to execute INSERT/UPDATE/DELETE queries; they will be committed when the last such automatic transaction in the control flow completes successfully. See DatabaseApi for the full details.

Environment.get_read_db and the decorators @with_transaction(env) and env.with_transaction() have been deprecated since Trac 1.0 and will be removed in Trac 1.3.1.

db parameters removed from function and method signatures

With the introduction of @with_transaction(env) decorators in 0.12 and continuing with the introduction of the database connection context managers in 1.0, the db parameters passed as function and method arguments became deprecated.

The db parameters have been removed from nearly all function and method signatures. The db arguments are still present on methods of IEnvironmentParticipant implementations, but are deprecated and should no longer be used. They will be removed in 1.3.1.

ConnectionBase class

The ConnectionBase class defines an abstract interface that database backends must adhere to when implementing a Connection class.

Template and CSS changes

tt tags are not support in HTML5 and have been replaced with code tags in Trac (#11094). The styling of tt and code tags is the same in Trac , but code tags should be used since the styling for tt tags will be removed in a future version of Trac.

The about.css stylesheet has been removed and the rules contained in that stylesheet have been moved to trac.css. The table of environment information on the Error and About pages have been extracted to a new template environment_info.html and the markup and associated rules in the stylesheet have been significantly changed.

Many more changes to be added, depending on how details we want to get. TracUpgrade#CustomizedTemplates claims that changes to ids and CSS classes will be documented in ApiChanges.

Uncategorized Changes

DONE Remove deprecated compatibility code for InterTrac links: trunk/trac/wiki/formatter.py@13050:703-712#L696​, and remove documentation:

• InterWiki page
• trunk/trac/wiki/intertrac.py@13050:50-60#L30​

DONE Removed the deprecated authname parameter from Environment.get_repository().

TODO Log warnings for deprecated functions and methods (comment:26:ticket:11605)

New in the 1.1.4 API

Be sure to have a look at the new ApiDocs (​for latest trunk).

TODO Remove Since info from docstrings for Trac < 0.12.

This is a work in progress - coverage is still not yet complete.