Projects management with Proxy ModelsΒΆ
John Boss is the project leader. Marcus Worker and Julius Backend are the django backend guys; Teresa Html is the front-end developer and Jack College is the student that has to learn to write good backends. The Celery pipeline is owned by Marcus, and Jack must see it without intercations. Teresa can’t see the pipeline, but John has full permissions as project leader. As part of the backend group, Julius has the right of viewing and editing, but not to stop (delete) the pipeline.
1) Define models in models.py:
from groups_manager.models import Group, GroupType
class Project(Group):
# objects = ProjectManager()
class Meta:
proxy = True
def save(self, *args, **kwargs):
if not self.group_type:
self.group_type = GroupType.objects.get_or_create(label='Project')[0]
super(Project, self).save(*args, **kwargs)
class WorkGroup(Group):
# objects = WorkGroupManager()
class Meta:
proxy = True
def save(self, *args, **kwargs):
if not self.group_type:
self.group_type = GroupType.objects.get_or_create(label='Workgroup')[0]
super(WorkGroup, self).save(*args, **kwargs)
class Pipeline(models.Model):
name = models.CharField(max_length=100)
class Meta:
permissions = (('view_pipeline', 'View Pipeline'), )
Warning
Remember to define a view_modelname permission.
2) Connect creation and deletion signals to the proxy models (This step is required if you want to sync with django auth models):
from django.db.models.signals import post_save, post_delete
from groups_manager.models import group_save, group_delete
post_save.connect(group_save, sender=Project)
post_delete.connect(group_delete, sender=Project)
post_save.connect(group_save, sender=WorkGroup)
post_delete.connect(group_delete, sender=WorkGroup)
3) Creates groups:
project_main = testproject_models.Project(name='Workgroups Main Project')
project_main.save()
django_backend = testproject_models.WorkGroup(name='WorkGroup Backend', parent=project_main)
django_backend.save()
django_backend_watchers = testproject_models.WorkGroup(name='Backend Watchers',
parent=django_backend)
django_backend_watchers.save()
django_frontend = testproject_models.WorkGroup(name='WorkGroup FrontEnd', parent=project_main)
django_frontend.save()
4) Creates members and assign them to groups:
john = models.Member.objects.create(first_name='John', last_name='Boss')
project_main.add_member(john)
marcus = models.Member.objects.create(first_name='Marcus', last_name='Worker')
julius = models.Member.objects.create(first_name='Julius', last_name='Backend')
django_backend.add_member(marcus)
django_backend.add_member(julius)
teresa = models.Member.objects.create(first_name='Teresa', last_name='Html')
django_frontend.add_member(teresa)
jack = models.Member.objects.create(first_name='Jack', last_name='College')
django_backend_watchers.add_member(jack)
5) Create the pipeline and assign custom permissions:
custom_permissions = {
'owner': ['view', 'change', 'delete'],
'group': ['view', 'change'],
'groups_upstream': ['view', 'change', 'delete'],
'groups_downstream': ['view'],
'groups_siblings': [],
}
pipeline = testproject_models.Pipeline.objects.create(name='Test Runner')
marcus.assing_object(django_backend, pipeline, custom_permissions=custom_permissions)
Note
The full tested example is available in repository source code, testproject‘s tests.py under test_proxy_models method.