Opened 7 years ago

Closed 7 years ago

#28057 closed Bug (invalid)

Admin inlines very slow to render

Reported by: Marc DEBUREAUX Owned by: nobody
Component: contrib.admin Version: 1.11
Severity: Normal Keywords: admin inlines
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by Marc DEBUREAUX)

When using inlines in Django admin, it renders very poorly even when creating a new element (so no data to load, database time always the same).

And the higher the number in "extra" parameter, the longer it takes to load the form.

Works well with Django 1.10

class EffectModifierInline(admin.TabularInline):
    model = EffectModifier
    extra = 1

class EffectAdmin(admin.ModelAdmin):
    fieldsets = (
        # Whatever
    inlines = [EffectModifierInline]
    # TODO:
    list_display = ()
    list_editable = ()
    list_filter = ()

    def get_queryset(self, request):
        return super().get_queryset(request).prefetch_related('modifiers')

With 15 inlines

With only 1 inline

With no inline

Change History (4)

comment:1 by Marc DEBUREAUX, 7 years ago

Description: modified (diff)

comment:2 by Marc DEBUREAUX, 7 years ago

UI/UX: unset

comment:3 by sect2k, 7 years ago

I encountered something similar just now, turned out the issue was occurring only when debug-toolbar was enabled.

comment:4 by Tim Graham, 7 years ago

Resolution: invalid
Status: newclosed

Yes, the issue is caused by the django-debug-toolbar I believe. See

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