=================== Customising Roundup =================== :Version: $Revision: 1.62 $ .. This document borrows from the ZopeBook section on ZPT. The original is at: http://www.zope.org/Documentation/Books/ZopeBook/current/ZPT.stx .. contents:: :depth: 1 What You Can Do =============== Before you get too far, it's probably worth having a quick read of the Roundup `design documentation`_. Customisation of Roundup can take one of five forms: 1. `tracker configuration`_ file changes 2. database, or `tracker schema`_ changes 3. "definition" class `database content`_ changes 4. behavioural changes, through detectors_ 5. `access controls`_ 6. change the `web interface`_ The third case is special because it takes two distinctly different forms depending upon whether the tracker has been initialised or not. The other two may be done at any time, before or after tracker initialisation. Yes, this includes adding or removing properties from classes. Trackers in a Nutshell ====================== Trackers have the following structure: =================== ======================================================== Tracker File Description =================== ======================================================== config.py Holds the basic `tracker configuration`_ dbinit.py Holds the `tracker schema`_ interfaces.py Defines the Web and E-Mail interfaces for the tracker select_db.py Selects the database back-end for the tracker db/ Holds the tracker's database db/files/ Holds the tracker's upload files and messages detectors/ Auditors and reactors for this tracker html/ Web interface templates, images and style sheets =================== ======================================================== Tracker Configuration ===================== The config.py located in your tracker home contains the basic configuration for the web and e-mail components of roundup's interfaces. As the name suggests, this file is a Python module. This means that any valid python expression may be used in the file. Mostly though, you'll be setting the configuration variables to string values. Python string values must be quoted with either single or double quotes:: 'this is a string' "this is also a string - use it when you have a 'single quote' in the value" this is not a string - it's not quoted Python strings may use formatting that's almost identical to C string formatting. The ``%`` operator is used to perform the formatting, like so:: 'roundup-admin@%s'%MAIL_DOMAIN this will create a string ``'roundup-admin@tracker.domain.example'`` if MAIL_DOMAIN is set to ``'tracker.domain.example'``. You'll also note some values are set to:: os.path.join(TRACKER_HOME, 'db') or similar. This creates a new string which holds the path to the "db" directory in the TRACKER_HOME directory. This is just a convenience so if the TRACKER_HOME changes you don't have to edit multiple valoues. The configuration variables available are: **TRACKER_HOME** - ``os.path.split(__file__)[0]`` The tracker home directory. The above default code will automatically determine the tracker home for you, so you can just leave it alone. **MAILHOST** - ``'localhost'`` The SMTP mail host that roundup will use to send e-mail. **MAIL_DOMAIN** - ``'tracker.domain.example'`` The domain name used for email addresses. **DATABASE** - ``os.path.join(TRACKER_HOME, 'db')`` This is the directory that the database is going to be stored in. By default it is in the tracker home. **TEMPLATES** - ``os.path.join(TRACKER_HOME, 'html')`` This is the directory that the HTML templates reside in. By default they are in the tracker home. **TRACKER_NAME** - ``'Roundup issue tracker'`` A descriptive name for your roundup tracker. This is sent out in e-mails and appears in the heading of CGI pages. **TRACKER_EMAIL** - ``'issue_tracker@%s'%MAIL_DOMAIN`` The email address that e-mail sent to roundup should go to. Think of it as the tracker's personal e-mail address. **TRACKER_WEB** - ``'http://your.tracker.url.example/'`` The web address that the tracker is viewable at. This will be included in information sent to users of the tracker. **ADMIN_EMAIL** - ``'roundup-admin@%s'%MAIL_DOMAIN`` The email address that roundup will complain to if it runs into trouble. **MESSAGES_TO_AUTHOR** - ``'yes'`` or``'no'`` Send nosy messages to the author of the message. **ADD_AUTHOR_TO_NOSY** - ``'new'``, ``'yes'`` or ``'no'`` Does the author of a message get placed on the nosy list automatically? If ``'new'`` is used, then the author will only be added when a message creates a new issue. If ``'yes'``, then the author will be added on followups too. If ``'no'``, they're never added to the nosy. **ADD_RECIPIENTS_TO_NOSY** - ``'new'``, ``'yes'`` or ``'no'`` Do the recipients (To:, Cc:) of a message get placed on the nosy list? If ``'new'`` is used, then the recipients will only be added when a message creates a new issue. If ``'yes'``, then the recipients will be added on followups too. If ``'no'``, they're never added to the nosy. **EMAIL_SIGNATURE_POSITION** - ``'top'``, ``'bottom'`` or ``'none'`` Where to place the email signature in messages that Roundup generates. **EMAIL_KEEP_QUOTED_TEXT** - ``'yes'`` or ``'no'`` Keep email citations. Citations are the part of e-mail which the sender has quoted in their reply to previous e-mail. **EMAIL_LEAVE_BODY_UNCHANGED** - ``'no'`` Preserve the email body as is. Enabiling this will cause the entire message body to be stored, including all citations and signatures. It should be either ``'yes'`` or ``'no'``. **MAIL_DEFAULT_CLASS** - ``'issue'`` or ``''`` Default class to use in the mailgw if one isn't supplied in email subjects. To disable, comment out the variable below or leave it blank. The default config.py is given below - as you can see, the MAIL_DOMAIN must be edited before any interaction with the tracker is attempted.:: # roundup home is this package's directory TRACKER_HOME=os.path.split(__file__)[0] # The SMTP mail host that roundup will use to send mail MAILHOST = 'localhost' # The domain name used for email addresses. MAIL_DOMAIN = 'your.tracker.email.domain.example' # This is the directory that the database is going to be stored in DATABASE = os.path.join(TRACKER_HOME, 'db') # This is the directory that the HTML templates reside in TEMPLATES = os.path.join(TRACKER_HOME, 'html') # A descriptive name for your roundup tracker TRACKER_NAME = 'Roundup issue tracker' # The email address that mail to roundup should go to TRACKER_EMAIL = 'issue_tracker@%s'%MAIL_DOMAIN # The web address that the tracker is viewable at TRACKER_WEB = 'http://your.tracker.url.example/' # The email address that roundup will complain to if it runs into trouble ADMIN_EMAIL = 'roundup-admin@%s'%MAIL_DOMAIN # Send nosy messages to the author of the message MESSAGES_TO_AUTHOR = 'no' # either 'yes' or 'no' # Does the author of a message get placed on the nosy list automatically? # If 'new' is used, then the author will only be added when a message # creates a new issue. If 'yes', then the author will be added on followups # too. If 'no', they're never added to the nosy. ADD_AUTHOR_TO_NOSY = 'new' # one of 'yes', 'no', 'new' # Do the recipients (To:, Cc:) of a message get placed on the nosy list? # If 'new' is used, then the recipients will only be added when a message # creates a new issue. If 'yes', then the recipients will be added on followups # too. If 'no', they're never added to the nosy. ADD_RECIPIENTS_TO_NOSY = 'new' # either 'yes', 'no', 'new' # Where to place the email signature EMAIL_SIGNATURE_POSITION = 'bottom' # one of 'top', 'bottom', 'none' # Keep email citations EMAIL_KEEP_QUOTED_TEXT = 'no' # either 'yes' or 'no' # Preserve the email body as is EMAIL_LEAVE_BODY_UNCHANGED = 'no' # either 'yes' or 'no' # Default class to use in the mailgw if one isn't supplied in email # subjects. To disable, comment out the variable below or leave it blank. # Examples: MAIL_DEFAULT_CLASS = 'issue' # use "issue" class by default #MAIL_DEFAULT_CLASS = '' # disable (or just comment the var out) Tracker Schema ============== Note: if you modify the schema, you'll most likely need to edit the `web interface`_ HTML template files and `detectors`_ to reflect your changes. A tracker schema defines what data is stored in the tracker's database. Schemas are defined using Python code in the ``dbinit.py`` module of your tracker. The "classic" schema looks like this:: pri = Class(db, "priority", name=String(), order=String()) pri.setkey("name") stat = Class(db, "status", name=String(), order=String()) stat.setkey("name") keyword = Class(db, "keyword", name=String()) keyword.setkey("name") user = Class(db, "user", username=String(), organisation=String(), password=String(), address=String(), realname=String(), phone=String()) user.setkey("username") msg = FileClass(db, "msg", author=Link("user"), summary=String(), date=Date(), recipients=Multilink("user"), files=Multilink("file")) file = FileClass(db, "file", name=String(), type=String()) issue = IssueClass(db, "issue", topic=Multilink("keyword"), status=Link("status"), assignedto=Link("user"), priority=Link("priority")) issue.setkey('title') Classes and Properties - creating a new information store --------------------------------------------------------- In the tracker above, we've defined 7 classes of information: priority Defines the possible levels of urgency for issues. status Defines the possible states of processing the issue may be in. keyword Initially empty, will hold keywords useful for searching issues. user Initially holding the "admin" user, will eventually have an entry for all users using roundup. msg Initially empty, will all e-mail messages sent to or generated by roundup. file Initially empty, will all files attached to issues. issue Initially empty, this is where the issue information is stored. We define the "priority" and "status" classes to allow two things: reduction in the amount of information stored on the issue and more powerful, accurate searching of issues by priority and status. By only requiring a link on the issue (which is stored as a single number) we reduce the chance that someone mis-types a priority or status - or simply makes a new one up. Class and Items ~~~~~~~~~~~~~~~ A Class defines a particular class (or type) of data that will be stored in the database. A class comprises one or more properties, which given the information about the class items. The actual data entered into the database, using class.create() are called items. They have a special immutable property called id. We sometimes refer to this as the itemid. Properties ~~~~~~~~~~ A Class is comprised of one or more properties of the following types: * String properties are for storing arbitrary-length strings. * Password properties are for storing encoded arbitrary-length strings. The default encoding is defined on the roundup.password.Password class. * Date properties store date-and-time stamps. Their values are Timestamp objects. * Number properties store numeric values. * Boolean properties store on/off, yes/no, true/false values. * A Link property refers to a single other item selected from a specified class. The class is part of the property; the value is an integer, the id of the chosen item. * A Multilink property refers to possibly many items in a specified class. The value is a list of integers. FileClass ~~~~~~~~~ FileClasses save their "content" attribute off in a separate file from the rest of the database. This reduces the number of large entries in the database, which generally makes databases more efficient, and also allows us to use command-line tools to operate on the files. They are stored in the files sub- directory of the db directory in your tracker. IssueClass ~~~~~~~~~~ IssueClasses automatically include the "messages", "files", "nosy", and "superseder" properties. The messages and files properties list the links to the messages and files related to the issue. The nosy property is a list of links to users who wish to be informed of changes to the issue - they get "CC'ed" e-mails when messages are sent to or generated by the issue. The nosy reactor (in the detectors directory) handles this action. The superceder link indicates an issue which has superceded this one. They also have the dynamically generated "creation", "activity" and "creator" properties. The value of the "creation" property is the date when an item was created, and the value of the "activity" property is the date when any property on the item was last edited (equivalently, these are the dates on the first and last records in the item's journal). The "creator" property holds a link to the user that created the issue. setkey(property) ~~~~~~~~~~~~~~~~ Select a String property of the class to be the key property. The key property muse be unique, and allows references to the items in the class by the content of the key property. That is, we can refer to users by their username, e.g. let's say that there's an issue in roundup, issue 23. There's also a user, richard who happens to be user 2. To assign an issue to him, we could do either of:: roundup-admin set issue assignedto=2 or:: roundup-admin set issue assignedto=richard Note, the same thing can be done in the web and e-mail interfaces. create(information) ~~~~~~~~~~~~~~~~~~~ Create an item in the database. This is generally used to create items in the "definitional" classes like "priority" and "status". Examples of adding to your schema --------------------------------- TODO Detectors - adding behaviour to your tracker ============================================ .. _detectors: Detectors are initialised every time you open your tracker database, so you're free to add and remove them any time, even after the database is initliased via the "roundup-admin initalise" command. The detectors in your tracker fire before (*auditors*) and after (*reactors*) changes to the contents of your database. They are Python modules that sit in your tracker's ``detectors`` directory. You will have some installed by default - have a look. You can write new detectors or modify the existing ones. The existing detectors installed for you are: **nosyreaction.py** This provides the automatic nosy list maintenance and email sending. The nosy reactor (``nosyreaction``) fires when new messages are added to issues. The nosy auditor (``updatenosy``) fires when issues are changed and figures what changes need to be made to the nosy list (like adding new authors etc) **statusauditor.py** This provides the ``chatty`` auditor which changes the issue status from ``unread`` or ``closed`` to ``chatting`` if new messages appear. It also provides the ``presetunread`` auditor which pre-sets the status to ``unread`` on new items if the status isn't explicitly defined. See the detectors section in the `design document`__ for details of the interface for detectors. __ design.html Sample additional detectors that have been found useful will appear in the ``detectors`` directory of the Roundup distribution: **newissuecopy.py** This detector sends an email to a team address whenever a new issue is created. The address is hard-coded into the detector, so edit it before you use it (look for the text 'team@team.host') or you'll get email errors! The detector code:: from roundup import roundupdb def newissuecopy(db, cl, nodeid, oldvalues): ''' Copy a message about new issues to a team address. ''' # so use all the messages in the create change_note = cl.generateCreateNote(nodeid) # send a copy to the nosy list for msgid in cl.get(nodeid, 'messages'): try: # note: last arg must be a list cl.send_message(nodeid, msgid, change_note, ['team@team.host']) except roundupdb.MessageSendError, message: raise roundupdb.DetectorError, message def init(db): db.issue.react('create', newissuecopy) Database Content ================ Note: if you modify the content of definitional classes, you'll most likely need to edit the tracker `detectors`_ to reflect your changes. Customisation of the special "definitional" classes (eg. status, priority, resolution, ...) may be done either before or after the tracker is initialised. The actual method of doing so is completely different in each case though, so be careful to use the right one. **Changing content before tracker initialisation** Edit the dbinit module in your tracker to alter the items created in using the create() methods. **Changing content after tracker initialisation** Use the roundup-admin interface's create, set and retire methods to add, alter or remove items from the classes in question. See "`adding a new field to the classic schema`_" for an example that requires database content changes. Access Controls =============== A set of Permissions are built in to the security module by default: - Edit (everything) - View (everything) The default interfaces define: - Web Registration - Web Access - Web Roles - Email Registration - Email Access These are hooked into the default Roles: - Admin (Edit everything, View everything, Web Roles) - User (Web Access, Email Access) - Anonymous (Web Registration, Email Registration) And finally, the "admin" user gets the "Admin" Role, and the "anonymous" user gets the "Anonymous" assigned when the database is initialised on installation. The two default schemas then define: - Edit issue, View issue (both) - Edit file, View file (both) - Edit msg, View msg (both) - Edit support, View support (extended only) and assign those Permissions to the "User" Role. Put together, these settings appear in the ``open()`` function of the tracker ``dbinit.py`` (the following is taken from the "minimal" template ``dbinit.py``):: # # SECURITY SETTINGS # # new permissions for this schema for cl in ('user', ): db.security.addPermission(name="Edit", klass=cl, description="User is allowed to edit "+cl) db.security.addPermission(name="View", klass=cl, description="User is allowed to access "+cl) # and give the regular users access to the web and email interface p = db.security.getPermission('Web Access') db.security.addPermissionToRole('User', p) p = db.security.getPermission('Email Access') db.security.addPermissionToRole('User', p) # May users view other user information? Comment these lines out # if you don't want them to p = db.security.getPermission('View', 'user') db.security.addPermissionToRole('User', p) # Assign the appropriate permissions to the anonymous user's Anonymous # Role. Choices here are: # - Allow anonymous users to register through the web p = db.security.getPermission('Web Registration') db.security.addPermissionToRole('Anonymous', p) # - Allow anonymous (new) users to register through the email gateway p = db.security.getPermission('Email Registration') db.security.addPermissionToRole('Anonymous', p) New User Roles -------------- New users are assigned the Roles defined in the config file as: - NEW_WEB_USER_ROLES - NEW_EMAIL_USER_ROLES Changing Access Controls ------------------------ You may alter the configuration variables to change the Role that new web or email users get, for example to not give them access to the web interface if they register through email. You may use the ``roundup-admin`` "``security``" command to display the current Role and Permission configuration in your tracker. Adding a new Permission ~~~~~~~~~~~~~~~~~~~~~~~ When adding a new Permission, you will need to: 1. add it to your tracker's dbinit so it is created 2. enable it for the Roles that should have it (verify with "``roundup-admin security``") 3. add it to the relevant HTML interface templates 4. add it to the appropriate xxxPermission methods on in your tracker interfaces module Example Scenarios ~~~~~~~~~~~~~~~~~ **automatic registration of users in the e-mail gateway** By giving the "anonymous" user the "Email Registration" Role, any unidentified user will automatically be registered with the tracker (with no password, so they won't be able to log in through the web until an admin sets them a password). Note: this is the default behaviour in the tracker templates that ship with Roundup. **anonymous access through the e-mail gateway** Give the "anonymous" user the "Email Access" and ("Edit", "issue") Roles but not giving them the "Email Registration" Role. This means that when an unknown user sends email into the tracker, they're automatically logged in as "anonymous". Since they don't have the "Email Registration" Role, they won't be automatically registered, but since "anonymous" has permission to use the gateway, they'll still be able to submit issues. Note that the Sender information - their email address - will not be available - they're *anonymous*. **only developers may be assigned issues** Create a new Permission called "Fixer" for the "issue" class. Create a new Role "Developer" which has that Permission, and assign that to the appropriate users. Filter the list of users available in the assignedto list to include only those users. Enforce the Permission with an auditor. See the example `restricting the list of users that are assignable to a task`_. **only managers may sign off issues as complete** Create a new Permission called "Closer" for the "issue" class. Create a new Role "Manager" which has that Permission, and assign that to the appropriate users. In your web interface, only display the "resolved" issue state option when the user has the "Closer" Permissions. Enforce the Permission with an auditor. This is very similar to the previous example, except that the web interface check would look like:: **don't give users who register through email web access** Create a new Role called "Email User" which has all the Permissions of the normal "User" Role minus the "Web Access" Permission. This will allow users to send in emails to the tracker, but not access the web interface. Web Interface ============= .. contents:: :local: :depth: 1 The web is provided by the roundup.cgi.client module and is used by roundup.cgi, roundup-server and ZRoundup. In all cases, we determine which tracker is being accessed (the first part of the URL path inside the scope of the CGI handler) and pass control on to the tracker interfaces.Client class - which uses the Client class from roundup.cgi.client - which handles the rest of the access through its main() method. This means that you can do pretty much anything you want as a web interface to your tracker. Repurcussions of changing the tracker schema --------------------------------------------- If you choose to change the `tracker schema`_ you will need to ensure the web interface knows about it: 1. Index, item and search pages for the relevant classes may need to have properties added or removed, 2. The "page" template may require links to be changed, as might the "home" page's content arguments. How requests are processed -------------------------- The basic processing of a web request proceeds as follows: 1. figure out who we are, defaulting to the "anonymous" user 2. figure out what the request is for - we call this the "context" 3. handle any requested action (item edit, search, ...) 4. render the template requested by the context, resulting in HTML output In some situations, exceptions occur: - HTTP Redirect (generally raised by an action) - SendFile (generally raised by determine_context) here we serve up a FileClass "content" property - SendStaticFile (generally raised by determine_context) here we serve up a file from the tracker "html" directory - Unauthorised (generally raised by an action) here the action is cancelled, the request is rendered and an error message is displayed indicating that permission was not granted for the action to take place - NotFound (raised wherever it needs to be) this exception percolates up to the CGI interface that called the client Determining web context ----------------------- To determine the "context" of a request, we look at the URL and the special request variable ``:template``. The URL path after the tracker identifier is examined. Typical URL paths look like: 1. ``/tracker/issue`` 2. ``/tracker/issue1`` 3. ``/tracker/_file/style.css`` 4. ``/cgi-bin/roundup.cgi/tracker/file1`` 5. ``/cgi-bin/roundup.cgi/tracker/file1/kitten.png`` where the "tracker identifier" is "tracker" in the above cases. That means we're looking at "issue", "issue1", "_file/style.css", "file1" and "file1/kitten.png" in the cases above. The path is generally only one entry long - longer paths are handled differently. a. if there is no path, then we are in the "home" context. b. if the path starts with "_file" (as in example 3, "/tracker/_file/style.css"), then the additional path entry, "style.css" specifies the filename of a static file we're to serve up from the tracker "html" directory. Raises a SendStaticFile exception. c. if there is something in the path (as in example 1, "issue"), it identifies the tracker class we're to display. d. if the path is an item designator (as in examples 2 and 4, "issue1" and "file1"), then we're to display a specific item. e. if the path starts with an item designator and is longer than one entry (as in example 5, "file1/kitten.png"), then we're assumed to be handling an item of a FileClass, and the extra path information gives the filename that the client is going to label the download with (ie "file1/kitten.png" is nicer to download than "file1"). This raises a SendFile exception. Both b. and e. stop before we bother to determine the template we're going to use. That's because they don't actually use templates. The template used is specified by the ``:template`` CGI variable, which defaults to: - only classname suplied: "index" - full item designator supplied: "item" Performing actions in web requests ---------------------------------- When a user requests a web page, they may optionally also request for an action to take place. As described in `how requests are processed`_, the action is performed before the requested page is generated. Actions are triggered by using a ``:action`` CGI variable, where the value is one of: **login** Attempt to log a user in. **logout** Log the user out - make them "anonymous". **register** Attempt to create a new user based on the contents of the form and then log them in. **edit** Perform an edit of an item in the database. There are some special form elements you may use: :link=designator:property and :multilink=designator:property The value specifies an item designator and the property on that item to add *this* item to as a link or multilink. :note Create a message and attach it to the current item's "messages" property. :file Create a file and attach it to the current item's "files" property. Attach the file to the message created from the :note if it's supplied. :required=property,property,... The named properties are required to be filled in the form. **new** Add a new item to the database. You may use the same special form elements as in the "edit" action. **retire** Retire the item in the database. **editCSV** Performs an edit of all of a class' items in one go. See also the *class*.csv templating method which generates the CSV data to be edited, and the "_generic.index" template which uses both of these features. **search** Mangle some of the form variables. Set the form ":filter" variable based on the values of the filter variables - if they're set to anything other than "dontcare" then add them to :filter. Also handle the ":queryname" variable and save off the query to the user's query list. Each of the actions is implemented by a corresponding *actionAction* (where "action" is the name of the action) method on the roundup.cgi.Client class, which also happens to be in your tracker as interfaces.Client. So if you need to define new actions, you may add them there (see `defining new web actions`_). Each action also has a corresponding *actionPermission* (where "action" is the name of the action) method which determines whether the action is permissible given the current user. The base permission checks are: **login** Determine whether the user has permission to log in. Base behaviour is to check the user has "Web Access". **logout** No permission checks are made. **register** Determine whether the user has permission to register Base behaviour is to check the user has "Web Registration". **edit** Determine whether the user has permission to edit this item. Base behaviour is to check the user can edit this class. If we're editing the "user" class, users are allowed to edit their own details. Unless it's the "roles" property, which requires the special Permission "Web Roles". **new** Determine whether the user has permission to create (edit) this item. Base behaviour is to check the user can edit this class. No additional property checks are made. Additionally, new user items may be created if the user has the "Web Registration" Permission. **editCSV** Determine whether the user has permission to edit this class. Base behaviour is to check the user can edit this class. **search** Determine whether the user has permission to search this class. Base behaviour is to check the user can view this class. Default templates ----------------- Most customisation of the web view can be done by modifying the templates in the tracker **html** directory. There are several types of files in there: **page** This template usually defines the overall look of your tracker. When you view an issue, it appears inside this template. When you view an index, it also appears inside this template. This template defines a macro called "icing" which is used by almost all other templates as a coating for their content, using its "content" slot. It will also define the "head_title" and "body_title" slots to allow setting of the page title. **home** the default page displayed when no other page is indicated by the user **home.classlist** a special version of the default page that lists the classes in the tracker **classname.item** displays an item of the *classname* class **classname.index** displays a list of *classname* items **classname.search** displays a search page for *classname* items **_generic.index** used to display a list of items where there is no *classname*.index available **_generic.help** used to display a "class help" page where there is no *classname*.help **user.register** a special page just for the user class that renders the registration page **style.css** a static file that is served up as-is Note: Remember that you can create any template extension you want to, so if you just want to play around with the templating for new issues, you can copy the current "issue.item" template to "issue.test", and then access the test template using the ":template" URL argument:: http://your.tracker.example/tracker/issue?:template=test and it won't affect your users using the "issue.item" template. How the templates work ---------------------- Basic Templating Actions ~~~~~~~~~~~~~~~~~~~~~~~~ Roundup's templates consist of special attributes on your template tags. These attributes form the Template Attribute Language, or TAL. The basic tag commands are: **tal:define="variable expression; variable expression; ..."** Define a new variable that is local to this tag and its contents. For example::
Display some issue information.
In the example, thetag and its contents are only displayed if the user has the View permission for issues. We consider the number zero, a blank string, an empty list, and the built-in variable nothing to be false values. Nearly every other value is true, including non-zero numbers, and strings with anything in them (even spaces!). **tal:repeat="variable expression"** Repeat this tag and its contents for each element of the sequence that the expression returns, defining a new local variable and a special "repeat" variable for each element. For example::
Existing Keywords | |||
---|---|---|---|
keyword here |
Title | title | ||
---|---|---|---|
Priority | priority | Status | status |
Superseder |
View: |
Nosy List | |
Assigned To | assignedto menu | ||
Change Note | |||
File | |||
submit button will go here |
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