dashboard增加删除虚拟机按钮

vim tables.py 新加如下内容

from django.utils.translation import ungettext_lazy
from openstack_dashboard import policy

定义删除动作：

class DeleteSnapshotAction(policy.PolicyTargetMixin, tables.DeleteAction):
    @staticmethod
    def action_present(count):
        return ungettext_lazy(
            u"Delete Snapshot",
            u"Delete Snapshots",
            count
        )

    @staticmethod
    def action_past(count):
        return ungettext_lazy(
            u"Deleted Snapshot",
            u"Deleted Snapshots",
            count

)
    #policy_rules = (("identity", "identity:delete_project"),)
    policy_rules = (("identity", "identity:delete_user"),)

    def allowed(self, request, datum):
#        if not api.keystone.keystone_can_edit_user() or \
#                (datum and datum.id == request.user.id):
#            return False
        return True

    def delete(self, request, obj_id):
        LOG.info("dedebeeeeeeeeeeeeeeeeeeee!")

        api.nova.server_delete(request, obj_id)
        LOG.info("afterrrrrrrrrrrrrrrrrrrr!")

3.注册删除按钮

row_actions = (CreateSnapshotAction,DeleteSnapshotAction,)