#25559: Conditional admin inline causes ValidationError
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Reporter: zborboa-google | Owner: nobody
Type: Uncategorized | Status: closed
Component: contrib.admin | Version: 1.8
Severity: Normal | Resolution: wontfix
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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Comment (by zborboa-google):
Can we document overriding `change_view` is possible to achieve this?
Here's a solution that works. Use `change_view` to conditionally display
the inline. Replace `myapp/admin.py` above with this:
{{{#!python
# myapp/admin.py
from django.contrib import admin
from models import Student
from models import Team
class CategoryInlineAdmin(admin.TabularInline):
model = Student.categories.through
class StudentAdmin(admin.ModelAdmin):
inlines = []
def change_view(self, request, object_id, form_url='',
extra_context=None):
# Display inline when the object has been saved and a team has
been selected.
self.inlines = []
try:
obj = self.model.objects.get(pk=object_id)
except self.model.DoesNotExist:
pass
else:
if obj.team:
self.inlines = [CategoryInlineAdmin,]
return super(StudentAdmin, self).change_view(request, object_id,
form_url, extra_context)
class TeamAdmin(admin.ModelAdmin):
pass
admin.site.register(Student, StudentAdmin)
admin.site.register(Team, TeamAdmin)
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/25559#comment:3>
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