#24282: Cannot Modify Foreign Keys Within Data Migrations
-------------------------------------+-------------------------------------
Reporter: Jeff Singer | Owner: Markus
| Holtermann
Type: Bug | Status: new
Component: Migrations | Version: 1.8alpha1
Severity: Release blocker | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Ubica):
* status: closed => new
* resolution: fixed =>
Comment:
I am getting this same issue in Django==2.2.10 as well as 2.2.17
When using models obtained from {{{apps.get_model}}} they are returned as
<class '__fake__.ModelName'> and if I try to assign it to a ForeignKey
field that causes a ValueError Exception:
{{{
ValueError: Cannot assign "<ModelName: ModelName object (10232)>":
"ModelName.field_name" must be a "ModelName" instance.
}}}
This can be avoided by using PKs instead, but I am not sure if it's
supposed to work with objects as well.
{{{
instance.foreign_key_field_id = instance.pk
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/24282#comment:15>
Django <https://code.djangoproject.com/>
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