Application level list life cycle¶
The low-level way to create and delete a mailing list is to use the
IListManager interface. This interface simply adds or removes the
appropriate database entries to record the list’s creation.
There is a higher level interface for creating and deleting mailing lists which performs additional tasks such as:
- validating the list’s posting address (which also serves as the list’s fully qualified name);
- ensuring that the list’s domain is registered;
- applying a list style to the new list;
- creating and assigning list owners;
- notifying watchers of list creation;
- creating ancillary artifacts (such as the list’s on-disk directory)
Creating a list with owners¶
You can also specify a list of owner email addresses. If these addresses are not yet known, they will be registered, and new users will be linked to them.
>>> owners = [ ... 'firstname.lastname@example.org', ... 'email@example.com', ... 'firstname.lastname@example.org', ... 'email@example.com', ... ] >>> ant = create_list('firstname.lastname@example.org', owners) >>> dump_list(address.email for address in ant.owners.addresses) email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org
None of the owner addresses are verified.
>>> any(address.verified_on is not None ... for address in ant.owners.addresses) False
However, all addresses are linked to users.
>>> from mailman.interfaces.usermanager import IUserManager >>> from zope.component import getUtility >>> user_manager = getUtility(IUserManager) >>> for address in owners: ... user = user_manager.get_user(address) ... print(int(user.user_id.int), list(user.addresses)) 1 email@example.com 2 firstname.lastname@example.org 3 email@example.com 4 firstname.lastname@example.org
If you create a mailing list with owner addresses that are already known to the system, they won’t be created again.
>>> bee = create_list('email@example.com', owners) >>> from operator import attrgetter >>> for user in sorted(bee.owners.users, key=attrgetter('user_id')): ... print(int(user.user_id.int), list(user.addresses)) 1 firstname.lastname@example.org 2 email@example.com 3 firstname.lastname@example.org 4 email@example.com
Deleting a list¶
Removing a mailing list deletes the list, all its subscribers, and any related artifacts.
>>> from mailman.app.lifecycle import remove_list >>> remove_list(bee) >>> from mailman.interfaces.listmanager import IListManager >>> print(getUtility(IListManager).get('firstname.lastname@example.org')) None
We should now be able to completely recreate the mailing list.
>>> buzz = create_list('email@example.com', owners) >>> dump_list(address.email for address in bee.owners.addresses) firstname.lastname@example.org email@example.com firstname.lastname@example.org email@example.com