def _get_anonymous_workflow_for(workflow: Workflow,
request: HttpRequest) -> Workflow:
"""
If not owner, return a cached duplicate of `workflow`.
The duplicate will be married to `request.session.session_key`, and its
`.is_anonymous` will return `True`.
"""
if not request.session.session_key:
request.session.create()
session_key = request.session.session_key
try:
return Workflow.objects.get(original_workflow_id=workflow.id,
anonymous_owner_session_key=session_key)
except Workflow.DoesNotExist:
try:
new_workflow = workflow.duplicate_anonymous(session_key)
except django.db.IntegrityError:
# Race: the same user just requested a duplicate at the same time,
# and both decided to duplicate simultaneously. A database
# constraint means one will get an IntegrityError ... so at this
# point we can assume our original query will succeed.
return Workflow.objects.get(
original_workflow_id=workflow.id,
anonymous_owner_session_key=session_key)
async_to_sync(rabbitmq.queue_render)(new_workflow.id,
new_workflow.last_delta_id)
if workflow.example:
server.utils.log_user_event_from_request(request,
'Opened Demo Workflow',
{'name': workflow.name})
return new_workflow
def _get_anonymous_workflow_for(workflow: Workflow,
request: HttpRequest) -> Workflow:
"""If not owner, return a cached duplicate of `workflow`.
The duplicate will be married to `request.session.session_key`, and its
`.is_anonymous` will return `True`.
"""
if not request.session.session_key:
request.session.create()
session_key = request.session.session_key
try:
return Workflow.objects.get(original_workflow_id=workflow.id,
anonymous_owner_session_key=session_key)
except Workflow.DoesNotExist:
if workflow.example:
server.utils.log_user_event_from_request(request,
'Opened Demo Workflow',
{'name': workflow.name})
new_workflow = workflow.duplicate_anonymous(session_key)
async_to_sync(rabbitmq.queue_render)(new_workflow.id,
new_workflow.last_delta_id)
return new_workflow