This patch adds the "add-another" button to ManyToMany? fields as well as ManyToOne?.
Makes life a tad easier :)
Index: django/views/admin/main.py
===================================================================
--- django/views/admin/main.py (revision 712)
+++ django/views/admin/main.py (working copy)
@@ -752,7 +752,7 @@
# fields with relationships to editable objects get an "add another" link,
# but only if the field doesn't have raw_admin ('cause in that case they get
# the "add" button in the popup)
- elif field.rel and isinstance(field.rel, meta.ManyToOne) and field.rel.to.admin:
+ elif field.rel and isinstance(field.rel, meta.ManyToOne) or isinstance(field.rel, meta.ManyToMany) and field.rel.to.admin:
t.append('{%% if perms.%s.%s %%}' % (field.rel.to.app_label, field.rel.to.get_add_permission()))
t.append(' <a href="../../../%s/%s/add/" class="add-another" id="add_%s" onclick="return showAddAnotherPopup(this);">' % \
(field.rel.to.app_label, field.rel.to.module_name, field_id))
