Versions

• Version 0.4 is for Plone 6.1 / 6.2 and Python 3.10+

• Version 0.3 is for Plone 5.2 and Python 3

• Versions < 0.3 are compatible with Archetypes (branch 0.2.x)

How it works

This package use marker interfaces and subscribe to IObjectWillBeRemovedEvent and IObjectWillBeMovedEvent events. If a marker interface is find on modified object, a exception will be raised.

You can also set some contents not deletable (for example) like this in your setuphandler :

from collective.preventactions.interfaces import IPreventDelete
from plone import api
from zope.interface import alsoProvides


def post_install(context):
    obj = api.content.get('/Plone/content-not-deleteable')
    alsoProvides(obj, IPreventDelete)
    obj.reindexObject(idxs=["object_provides"])

Reindexing object_provides lets the uninstall profile find and unmark the object.

Installation

To install collective.preventactions you simply add collective.preventactions to the list of eggs in your buildout, run buildout and restart Plone.

Then, install collective.preventactions using the Add-ons control panel.

Development

You only need uv. The Makefile follows the one generated by cookieplone for a backend add-on

make install         # .venv (Python 3.12, Plone 6.2.3) and instance configuration
make create-site     # create a "Plone" site with collective.preventactions installed
make start           # http://localhost:8080/Plone (admin / admin)
make console         # debug console on the instance
make remove-data     # remove all content (and the .venv)

make clean && PLONE_VERSION=6.1-latest make install builds against another Plone release, and DELETE_EXISTING=1 make create-site recreates the site.

Tests and code quality are managed by plone.meta and tox

make test            # tests on Python 3.12 with Plone 6.2.3
make lint            # pre-commit hooks (black, isort, flake8, zpretty, codespell...)
make format          # reformat code
make test-all        # lint, every supported Python / Plone version, dependency checks

Any tox environment can be run directly, e.g. uvx --with tox-uv tox -e py313-plone61. Do not edit the files generated by plone.meta: change .meta.toml and run uvx --from plone.meta config-package --branch current . instead.

License

The project is licensed under the GPLv2.

0.4.0 (2026-11-12)

• Fix: the “Prevent actions” form now reindexes object_provides, so the uninstall profile also unmarks objects protected through the form. [remdub]

• Fix: the uninstall profile now removes the “Prevent actions” object action. [remdub]

• Modernize package (Plone 6.2.3, PEP420, plone.meta, tests, french locales) [remdub]

• Add behavior to choose which content types to prevent. [remdub]

0.3.0 (2019-11-26)

• Remove Archetypes dependency. [bsuttor]

0.2.1 (2018-07-10)

• Typo. [bsuttor]

0.2 (2018-07-09)

• Fix check render of PreventActionForm. [bsuttor]

0.1 (2016-09-20)

• Package created using mr.bob [bsuttor]