#35814: Django migrations & default JSONField
-------------------------------------+-------------------------------------
Reporter: FormindMPO | Type:
| Uncategorized
Status: new | Component:
| Migrations
Version: 4.2 | Severity: Normal
Keywords: JSONField, default | 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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Hello,
I'm working on a dynamic translated field (dynamic means i won't use i18n
to make it)
I want to use a JSONField in my Article model, as so :
{{{
title = models.JSONField(default=defaultTraduction)
description = models.JSONField(default=defaultTraduction)
}}}
Because making usage of models.JSONField(default=dict(fr="",en="",es=""))
raises a warning.
My model is stored in a file named Article.py, inside a models folder.
When loading my migration : python manage.py makemigrations, it tries to
import the default function, as so :
{{{
migrations.AlterField(
model_name="article",
name="title ",
field=models.JSONField(default=recon.models.article.defaultTraduction),
),
}}}
But this is not a function part of the class, it is part of the file, so i
have the following error when migrating / changing migration :
field=models.JSONField(default=recon.models.article.defaultTraduction),
AttributeError: type object 'article' has no attribute 'defaultTraduction'
:(
I tried to override the value, with the actual value ->
dict(fr="",en="",es=""), but it automaticly detects a modification on next
migration
I tried to move the function in another file -> same issue (type object
'**my filename**' has no attribute 'defaultTraduction'
I tried to move the function in another file, and put it in a class ->
Then in my code it gives
{{{
class utils :
def defaultTraduction():
return dict(fr="",en="",es="")
_____
class Article
title = models.JSONField(default=utils.defaultTraduction)
}}}
And now i have a recon.models.utils.utils.defaultTraduction (stacked
utils)
I seems that django doesn't really likes this defaut import, how to deal
with ?
Thank you
--
Ticket URL: <https://code.djangoproject.com/ticket/35814>
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