Add btrees in annotations
This is a package for integrators.
Add collective.btrees to the eggs in your buildout. Add it to the zcml too, if you are on Plone 3.2 or lower. No need for further installation in the Plone UI.
This makes some small adapters available to store btrees in annotations on an object. There are adapters for all the btrees in the BTrees module. The adapters make the public methods of btrees available in the adapter. Use this when you want this and when you understand what this means. :-)
Usually you will want to create an own adapter to override some settings, at least the key used to store the annotations. Put this in an adapters.py:
from zope.interface import implements from zope.interface import Interface from collective.btrees.interfaces import IOOBTreeContainer from collective.btrees.adapters import OOBTreeContainer class IFormValuesContainer(IOOBTreeContainer): pass class FormValuesContainer(OOBTreeContainer): implements(IFormValuesContainer) ANNO_KEY = 'my.package.formvalues' def _check_key(self, key): if not isinstance(key, basestring): raise TypeError("base string expected as key") def _check_value(self, value): if not isinstance(value, dict): raise TypeError("dictionary expected as value")
Register the adapter in zcml:
<adapter for="zope.interface.Interface" provides=".adapters.IFormValuesContainer" factory=".adapters.FormValuesContainer" />
Use it within for example a browser view to store the request form dictionary in the btree (if this for some reason makes sense for your website):
container = IFormValuesContainer(self.context) key = 'my key' # maybe use the user id as key value = self.request.form container.insert(key, value) container.get(key) # will return value
I have tried this on Plone 3.3 and 4.1. It will likely work on other versions as well.