Zope products that are now distributed separately¶
During the Zope 4 development, several packages that used to be included have been separated out and ship separately.
On this page the term “add to your application buildout” is used generically.
How you do so depends on your chosen installation method, like adding an egg
name to a requirements file for
pip installs, or adding it to an
ZServer does not support Python 3. The following only applies for Zope 4 under Python 2.
If you want to continue using ZServer instead of moving to WSGI you need to add the ZServer egg to your application buildout.
If you use the recipe
plone.recipe.zope2instance in a buildout, add it to
eggs attribute and also add the flag
wsgi = off.
If you have used (or want to use) the built-in support for sessioning, add the
Products.Sessions to your application buildout, which provides the
basic infrastructure without the actual session data storage.
For non-production environments you can use the old
Products.TemporaryFolder temporary folder solution for storing session
data. But this implementation is known to randomly lose session data, so do not
use it in production. Add the package
Products.TemporaryFolder to your
application buildout and make sure your Zope configuration file contains a ZODB
configuration for a temporary folder like this:
<zodb_db temporary> <mappingstorage> name Temporary database (for sessions) </mappingstorage> mount-point /temp_folder container-class Products.TemporaryFolder.TemporaryContainer </zodb_db>
If sessions are used very sparingly you can even get away with just adding a
Folder object named
temp_folder at the root of the ZODB and restarting
Zope so the necessary ZODB objects for session support are created. This will
not lose session data, but it has a high risk of producing ZODB conflict errors
when storing data unless the session is used very carefully to minimize write
For production deployments see, see the Zope book chapter on sessioning for alternative session storage options.
If you have External Method objects in your ZODB, make sure to add the egg
Products.ExternalMethod to your application buildout.
Site Error Log¶
If you have used the Site Error Log (the
error_logs objects that show
information about errors occurring in your application), add the egg
Products.SiteErrorLog to your application buildout.