#27886: Django contrib.postgres JSONField adds additonal quotes to a dictionary.
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Reporter: pypetey | Owner: (none)
Type: Uncategorized | Status: new
Component: contrib.postgres | Version: 1.10
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I have installed django-channels and django-cq library for
async/background tasks.
JSONField from django.contrib.postgres.fields is used on the model.
And when I assign to function to do async stuff the django-cq library
would be creating a task in the database.
The code is relatively simple - it creates a Task object in the database
and it uses JSONField from contrib.postgres on signature field.
sig = to_signature(func, args, kwargs)
if parent is None and previous:
parent = previous.parent
task = Task.objects.create(signature={}, parent=parent,
previous=previous, **kw)
When I access task objcect directly then I get
task.__dict__
Out[2]:
{'_parent_cache': None,
'_previous_cache': None,
'_state': <django.db.models.base.ModelState at 0x83fcfd0>,
'_uncommitted_filefields': [],
'at_risk': 'N',
'details': {},
'finished': None,
'force_chain': False,
'id': UUID('40e62169-f743-47a1-95ea-ebe57acc9f38'),
'last_retry': None,
'parent_id': None,
'previous_id': None,
'result_expiry': None,
'result_ttl': 1800,
'retries': 0,
'signature': {'args': (),
'func_name': 'apps.accounts.consumers.send_email',
'kwargs': {}},
'started': None,
'status': 'P',
'submitted': datetime.datetime(2017, 2, 28, 13, 47, 46, 329656,
tzinfo=<UTC>),
'waiting_on_id': None}
However, when I do refresh the instsance from db by doing
task.refresh_from_db() and then task.__dict__
I will receive this variation which has completely different quoting on
JSONField fields (signature and details)
Out[4]:
{'_state': <django.db.models.base.ModelState at 0x83fcfd0>,
'_uncommitted_filefields': [],
'at_risk': 'N',
'details': '{}',
'finished': None,
'force_chain': False,
'id': UUID('40e62169-f743-47a1-95ea-ebe57acc9f38'),
'last_retry': None,
'parent_id': None,
'previous_id': None,
'result_expiry': None,
'result_ttl': 1800,
'retries': 0,
'signature': '{"args": [], "kwargs": {}, "func_name":
"apps.accounts.consumers.send_email"}',
'started': None,
'status': 'P',
'submitted': datetime.datetime(2017, 2, 28, 13, 47, 46, 329656,
tzinfo=<UTC>),
'waiting_on_id': None}
What could be root cause of the problem? Is it a bug in django?
I use windows 10 pro, postgres 95, python 3.5 32bit
This ticket might be related with:
https://code.djangoproject.com/ticket/25532#no2
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Ticket URL: <https://code.djangoproject.com/ticket/27886>
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