view doc/FAQ.txt @ 7853:03c1b7ae3a68

issue2551328/issue2551264 unneeded next link and total_count incorrect Fix: issue2551328 - REST results show next link if number of results is a multiple of page size. (Found by members of team 3 in the UMass-Boston CS682 Spring 2024 class.) issue2551264 - REST X-Total-Count header and @total_size count incorrect when paginated These issues arose because we retrieved the exact number of rows from the database as requested by the user using the @page_size parameter. With this changeset, we retrieve up to 10 million + 1 rows from the database. If the total number of rows exceeds 10 million, we set the total_count indicators to -1 as an invalid size. (The max number of requested rows (default 10 million +1) can be modified by the admin through interfaces.py.) By retrieving more data than necessary, we can calculate the total count by adding @page_index*@page_size to the number of rows returned by the query. Furthermore, since we return more than @page_size rows, we can determine the existence of a row at @page_size+1 and use that information to determine if a next link should be provided. Previously, a next link was returned if @page_size rows were retrieved. This change does not guarantee that the user will get @page_size rows returned. Access policy filtering occurs after the rows are returned, and discards rows inaccessible by the user. Using the current @page_index/@page_size it would be difficult to have the roundup code refetch data and make sure that a full @page_size set of rows is returned. E.G. @page_size=100 and 5 of them are dropped due to access restrictions. We then fetch 10 items and add items 1-4 and 6 (5 is inaccessible). There is no way to calculate the new database offset at: @page_index*@page_size + 6 from the URL. We would need to add an @page_offset=6 or something. This could work since the client isn't adding 1 to @page_index to get the next page. Thanks to HATEOAS, the client just uses the 'next' url. But I am not going to cross that bridge without a concrete use case. This can also be handled client side by merging a short response with the next response and re-paginating client side. Also added extra index markers to the docs to highlight use of interfaces.py.
author John Rouillard <rouilj@ieee.org>
date Mon, 01 Apr 2024 09:57:16 -0400
parents 692242b3effd
children
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===========
Roundup FAQ
===========

.. contents::
   :local:


Installation
------------

Living without a mailserver
~~~~~~~~~~~~~~~~~~~~~~~~~~~

Remove the nosy reactor - delete the tracker file
``detectors/nosyreactor.py`` from your tracker home.

You do need to configure the ``[mail]`` section of
config.ini. Specifically the ``domain`` and ``host`` settings have to
have a value. The values don't matter, but the config parser will
complain if they are not set.

The cgi-bin is very slow!
~~~~~~~~~~~~~~~~~~~~~~~~~

Yep, it sure is. It has to start up Python and load all of the support
libraries for *every* request.

The solution is to use the built in server (or possibly mod_wsgi
or other WSGI support).

To make Roundup more seamless with your website, you may place the built
in server behind apache and link it into your web tree (see below).


How do I put Roundup behind Apache
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We have a project (foo) running on ``tracker.example:8080``.
We want ``http://tracker.example/issues`` to use the roundup server, so we 
set that up on port 8080 on ``tracker.example`` with the ``config.ini`` line::

  [tracker]
  ...
  web = 'http://tracker.example/issues/'

We have a "foo_issues" tracker and we run the server with::

  roundup-server -p 8080 issues=/home/roundup/trackers/issues 

Then, on the Apache machine (eg. redhat 7.3 with apache 1.3), in
``/etc/httpd/conf/httpd.conf`` uncomment::

  LoadModule proxy_module       modules/libproxy.so

and::

  AddModule mod_proxy.c

Then add::

  # roundup stuff (added manually)
  <IfModule mod_proxy.c>
  # proxy through one tracker
  ProxyPass /issues/ http://tracker.example:8080/issues/
  # proxy through all tracker(*)
  #ProxyPass /roundup/ http://tracker.example:8080/
  </IfModule>

Then restart Apache. Now Apache will proxy the request on to the
roundup-server.

Note that if you're proxying multiple trackers, you'll need to use the
second ProxyPass rule described above. It will mean that your TRACKER_WEB
will change to::

  TRACKER_WEB = 'http://tracker.example/roundup/issues/'

Once you're done, you can firewall off port 8080 from the rest of the world.

Note that in some situations (eg. virtual hosting) you might need to use a
more complex rewrite rule instead of the simpler ProxyPass above. The
following should be useful as a starting template::

  # roundup stuff (added manually)
  <IfModule mod_proxy.c>

  RewriteEngine on
  
  # General Roundup
  RewriteRule ^/roundup$  roundup/    [R]
  RewriteRule ^/roundup/(.*)$ http://tracker.example:8080/$1   [P,L]
  
  # Handle Foo Issues
  RewriteRule ^/issues$  issues/    [R]
  RewriteRule ^/issues/(.*)$ http://tracker.example:8080/issues/$1 [P,L]
  
  </IfModule>


How do I run Roundup through SSL (HTTPS)?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The preferred way of using SSL is to proxy through apache and use its
SSL service. See the previous question on how to proxy through apache.

The standalone roundup-server now also has SSL support which is still
considered experimental. For details refer to the documentation of
roundup server, in particular to the generated configuration file
generated with ::

    roundup-server --save-config

that describes the needed option in detail. With the standalone server
now XMLRPC over SSL works, too.


Templates
---------

What is that stuff in the tracker html directory?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is the template code that Roundup uses to display the various pages.
This is based upon the template markup language in Zope called, oddly
enough, "Zope Page Templates". There's documentation in the Roundup
reference_ documentation. For more information have a look at:

   https://zope.readthedocs.io/en/latest/zopebook/ZPT.html

specifically the chapter (10) on "Using Zope Page Templates" and the
chapter (13) on "Advanced Page Templates". (Note the link above is for
a newer version of Zope, so some of the info may not apply to version
2 of Zope which is used in roundup. The version 2 docs appear to not
be available anymore.)


But I just want a select/option list for ....
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Really easy... edit ``html/issue.item.html``. For ``nosy``, change the line
(around line 69) from::

  <span tal:replace="structure context/nosy/field" />

to::

  <span tal:replace="structure context/nosy/menu" />

For ``assigned to``, this is already done around line 77::

  <td tal:content="structure context/assignedto/menu">assignedto menu</td>



Great! But now the select/option list is too big
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

That is a little harder (but only a little ;^)

Again, edit ``html/issue.item``. For nosy, change line (around line 69) from::

  <span tal:replace="structure context/nosy/field" />

to::

  <span tal:replace="structure python:context.nosy.menu(height=3)" />

for more information, go and read about Zope Page Templates.

I want to link version identifiers from my messages to svn/mercurial/git
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

See: the LinkFormatingExample at:

https://wiki.roundup-tracker.org/LinkFormattingExample?highlight=%28local%5C_replace%29

There are examples in the devel and responsive templates. Search for
LocalReplace to find the extension file and the change that has to be
made to the item template.

I can see values in a multilink but not display the items
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Make sure that you have allowed the user to view the labelprop for the
multilink class. Look for the setlabelprop explanation in the Roundup
reference_ documentation.

Using Roundup
-------------

I got an error and I cannot reload it!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If you're using Netscape/Mozilla, try holding shift and pressing reload.
If you're using IE then install Mozilla and try again ;^)


I keep getting logged out
~~~~~~~~~~~~~~~~~~~~~~~~~

Make sure that the ``tracker`` -> ``web`` setting in your tracker's
config.ini is set to the URL of the tracker.

I'm getting infinite redirects in the browser
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A wrong value for the ``tracker`` -> ``web`` setting may also result in
infinite redirects, see https://issues.roundup-tracker.org/issue2537286


How is sorting performed, and why does it seem to fail sometimes?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

When we sort items in the hyperdb, we use one of a number of methods,
depending on the properties being sorted on:

1. If it's a String, Integer, Number, Date or Interval property, we
   just sort the scalar value of the property. Strings are sorted
   case-sensitively.
2. If it's a Link property, we sort by either the linked item's "order"
   property (if it has one) or the linked item's "id".
3. Mulitlinks sort similar to #2, but we start with the first
   Multilink list item, and if they're the same, we sort by the second item,
   and so on.

Note that if an "order" property is defined on a Class that is used for
sorting, all items of that Class *must* have a value against the "order"
property, or sorting will result in random ordering.


How do I filter roundup emails?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

When roundup emails users, it provides an email header::

  X-Roundup-(class)-(property): values

for every property that is a link or multilink (usually things
set by a dropdown or selection in the web interface).

For example, assume you have a category field for issues in your tracker.
You respond to issues that fall into the catagories: Network and Security.

You will see headers like:

  X-Roundup-issue-category: Network

or

  X-Roundup-issue-category: Network, Security, Linux

Then you can set up a filter looking for X-Roundup-issue-category
followed by Network or Security in your mail program.

Also for newer (post version 1.6.X) releases there is also a header:

  X-Roundup-issue-Id: 22

for messages from issue22. Directions on using your mail program are
beyond the scope of this FAQ entry.

(If you don't see a header for a multilink or link property, look for
msg_header_property in the roundup docs. In some cases you have to
explicitly enable the header.)


.. _`reference`: reference.html


Roundup Issue Tracker: http://roundup-tracker.org/